10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 28, 2012

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to              .

Commission file number: 0-9692

TELLABS, INC.

(Exact name of registrant as specified in its charter)

Delaware	36-3831568
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
One Tellabs Center, 1415 West Diehl Road, Naperville, Illinois (Address of principal executive offices)	60563 (Zip Code)

Registrant’s telephone number, including area code: (630) 798-8800

Securities registered pursuant to Section 12(b) of the Act:

Common stock, $0.01 par value

(Title of Class)

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  þ    No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  þ

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  þ    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (229.405) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    þ

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	þ		Accelerated filer	¨
Non-accelerated filer	¨	(Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  þ

The approximate aggregate market value of voting and non-voting common equity held by non-affiliates of the Registrant computed as of June 29, 2012, was $1,108,958,938. (Solely for the purpose of calculating the preceding amount, all directors and executive officers of the Registrant are deemed to be affiliates.)

As of February 15, 2013, there were 356,185,970 shares of the Registrant’s common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s Proxy Statement for its 2013 Annual Meeting of Stockholders are incorporated by reference into Part III.

TELLABS, INC.

ANNUAL REPORT ON FORM 10-K

FOR THE YEAR ENDED DECEMBER 28, 2012

TABLE OF CONTENTS

		PAGE
PART I
Item 1.	Business		3
Item 1A.	Risk Factors		13
Item 1B.	Unresolved Staff Comments		24
Item 2.	Properties		24
Item 3.	Legal Proceedings		24
Item 4.	Mine Safety Disclosures		24
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities		26
Item 6.	Selected Financial Data		28
Item 7.	Management’s Discussion and Analysis of Results of Operations and Financial Condition		28
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk		42
Item 8.	Financial Statements and Supplementary Data		44
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		82
Item 9A.	Controls and Procedures		82
Item 9B.	Other Information		82
PART III
Item 10.	Directors, Executive Officers and Corporate Governance		83
Item 11.	Executive Compensation		83
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters		83
Item 13.	Certain Relationships and Related Transactions, and Director Independence		84
Item 14.	Principal Accountant Fees and Services		84
PART IV
Item 15.	Exhibits and Financial Statement Schedules		84
	Schedule II – Valuation and Qualifying Accounts and Reserves		88
	Signatures		89
	Exhibit Index		90
	Subsidiaries of the Registrant
	Consent of Independent Registered Public Accounting Firm
	Section 302 Certification of CEO
	Section 302 Certification of CFO
	Section 906 Certification of CEO
	Section 906 Certification of CFO
	XBRL Instance Document
	XBRL Taxonomy Extension Schema Document
	XBRL Taxonomy Calculation Linkbase Document
	XBRL Taxonomy Extension Definition Linkbase Document
	XBRL Taxonomy Extension Label Linkbase Document
	XBRL Taxonomy Extension Presentation Linkbase Document

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PART 1

ITEM 1. BUSINESS

Note: A glossary of industry and technical terms used in this Form 10-K appears at the end of this Item 1.

Tellabs, Inc. was incorporated in 1975 as an Illinois corporation. In 1992, our stockholders approved the formation of a holding company structure. Under that new structure the stockholders of Tellabs, Inc., an Illinois corporation, became the stockholders of a new holding company, Tellabs, Inc., a Delaware corporation. Tellabs’ vision is to enrich people’s lives by innovating the way the world connects. We work toward that vision by designing and marketing equipment and services to communications-services providers worldwide.

Our products and services, in combination with our Tellabs^® 8000 Intelligent Network Manager, enable our customers to deliver wireless and wireline voice, data and video services to business and residential customers. We sell our products domestically and internationally through our field sales force and distributors/partners. Our customers are primarily communication services providers, including wireline and wireless service providers, multiple system operators (MSOs), and competitive service providers (CSPs). Our customer base also includes distributors, original equipment manufacturers (OEMs), system integrators and government agencies.

While we market our products under a variety of solution names, we run our business and report operating results in four segments: Optical, Data, Access and Services.

The Optical segment includes solutions that enable service providers to manage network bandwidth by adding capacity when and where needed. Service providers use these solutions to support metro networks, mobile services, business services for enterprises, and triple-play voice, video and data services for residential consumers. The primary products in this segment include the Tellabs^® 5000 Series of Digital Cross-Connect systems, the Tellabs^® 6300 Managed Transport System, the Tellabs^® 7100 Optical Transport System (OTS) and the Tellabs^® 7300 Metro Ethernet Switching Series.

• The Tellabs 5000 Series of Digital Cross-Connect systems manages and routes voice, data and video traffic and combines, consolidates and segregates signals to maximize efficiency. It also provides a centralized point for network performance monitoring and testing, as well as converting different signal formats. Used by every major service provider in North America (United States and Canada), the Tellabs 5500 Digital Cross-Connect reduces equipment and maintenance costs and maximizes network profitability.

• The Tellabs 6300 Managed Transport System is an SDH (Synchronous Digital Hierarchy) based transport platform that serves wireline and wireless operators outside North America.

• The Tellabs 7100 OTS enables service providers to deliver high-speed wavelength services and alleviate bandwidth bottlenecks. The Tellabs 7100 system integrates optical and electrical transport via wavelength selective switches (WSS), Optical Transport Network (OTN), ROADM (reconfigurable optical add-drop multiplexing), Ethernet switching, next-generation MSPPs (multiservice provisioning platforms) and DWDM (dense wave-division multiplexing) into a single platform. The 7100 system decreases capital and operating expenses by reducing network elements and equipment interconnections.

• The Tellabs 7300 Metro Ethernet Switching Series offers a portfolio of Ethernet switching products that address service management, provisioning, monitoring and troubleshooting.

The Data segment products include next-generation packet-switched products that enable wireless and wireline carriers to deliver mobile voice and Internet services and wireline business services to their customers. Data products include the Tellabs^® 8100 Managed Access System and the Tellabs^® 8600 and 8800 Smart Routers

• The Tellabs 8100 Managed Access System is used outside North America in business-service and wireless applications to deliver integrated 2G voice and data services with an evolutionary path to 3G services.

• The Tellabs 8600 Smart Router provides cost-efficient ways to migrate from 3G to Long Term Evolution (LTE) networks by using pseudo wire technology to manage Time Division Multiplexing (TDM), frame

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relay, Asynchronous Transfer Mode (ATM), Ethernet and Internet Protocol (IP) traffic in a single device. It is ideal for current customers of the Tellabs^® 6300 Managed Transport System and the Tellabs^® 8100 Managed Access systems because it can be fully integrated with those platforms under a common network manager.

• The Tellabs 8800 Smart Router enables service providers to leverage existing infrastructure to cost-effectively integrate all their networks (ATM, Frame Relay, Ethernet and IP) onto a converged MPLS network, while retaining quality of service (QoS). This capability enables users to share information regardless of their access technology. The Tellabs 8800 Smart Router is able to take in traffic of any network type and route it over any other network type.

The Access segment products enable service providers to deliver bundled voice, video and high-speed Internet/data services over the “last mile” of copper or fiber networks. Access products also enable optical local area networking (LAN) using gigabit passive optical network (GPON) technology. Access offerings include the Tellabs^® 1000 Multiservice Access Series, the Tellabs^® 1100 Multiservice Access Series and the Tellabs^® 1600 Optical Network Terminal (ONT) Series.

• The Tellabs 1000 and 1100 Series can be configured as a digital loop carrier (DLC) or a digital subscriber line access multiplexer (DSLAM). In addition, the 1000 series serves as an optical line terminal (OLT) for fiber-to-the-premise (FTTP) network architectures using optical network (BPON) technology and a voice gateway for voice-over-Internet-protocol (VoIP). The 1100 series serves as an OLT for GPON FTTP networks and optical LANs, as well as for fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) network architectures.

• The Tellabs 1600 series of ONTs consist of remote devices installed at user locations for both FTTP networks and optical LANs.

The Services segment delivers deployment, training, support and professional services to Tellabs’ customers. Through these offerings, Tellabs serves its customers through the phases of planning, deploying and operating a network.

• Deployment services include project management, engineering, material furnishing, installation, testing and acceptance to ensure timely implementation of network projects.

• Training services are designed to equip customers with the hands-on skills needed to deploy, provision, operate and maintain Tellabs products.

• Support includes services that Tellabs delivers to help customers quickly and effectively address network issues.

• Professional services include primarily consulting and network design services that enable our customers to operate their network facilities in a more efficient and effective manner.

On December 1, 2009, we acquired WiChorus, Inc. (WiChorus), a supplier of mobile packet core products. The intent of the acquisition was to enable Tellabs to expand into mobile packet core networks. On January 31, 2012, we announced that we would discontinue development of new products for the mobile packet core market, which had not measured up to our expectations during the prior two years. We reduced 2012 operating expenses through the decision to discontinue development of new products for the mobile packet core market, a restructuring action announced on October 24, 2012, and other cost-savings initiatives.

In January 2013, we announced that we would discontinue development of the Tellabs 9200^®, a large-capacity edge router designed primarily for mobile backhaul applications. This decision was based on a return-on-investment analysis, customer needs and market conditions.

As customers migrate to new technologies, revenue from earlier-developed products and services declines and overall corporate profitability suffers. This situation is compounded when customers are slow to adopt newer products and services. In the face of these market conditions, Tellabs is targeting near-term nominal profitability while streamlining its costs and operating expenses with the goal of managing research and development to enhance Tellabs solutions for future revenue growth.

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COMPETITION

We sell our products and services in global markets where competition is intense. Our customers base their purchasing decisions on multiple factors including: product features, performance, price, total cost of ownership, quality, reliability, capacity and customer service. Breadth of product line, customer-oriented planning and delivery, emerging technology, vendor financial stability and relationships, incumbency and responsiveness to their needs also factor into these decisions.

Tellabs’ competition comes primarily from telecommunications and data networking infrastructure vendors. These vendors include large systems integrators and smaller companies whose products and services compete directly or indirectly with our offerings. Some of these companies compete with us across many of our products and services, while others may be a competitor with respect to a specific product.

SALES ORGANIZATION

Our sales organization includes direct sales personnel, sales support personnel and distributors/partners around the world. In North America, the sales organization is structured by customer type, e.g., Wireline and Wireless Service Providers, Multiple Services Operators (MSOs), Competitive Service Providers (CSPs), etc. Outside North America, the sales organization is structured on a regional basis: Latin America (Mexico, Central and South America, and the Caribbean), EMEA (Europe, Middle East and Africa) and Asia Pacific (Australia, the Far East, and the Indian subcontinent).

Our direct sales force accounts for the majority of revenue. In North America, our products and services are also sold through value-added resellers and distributors. Outside North America, we have business relationships with independent sales representatives and distributors, as well as other public and private network providers that distribute products. Some of our distributors provide information on our products through their catalogs and through trade-show demonstrations. Direct sales organizations and selected distributors generated the following 2012 revenue:

	Direct Sales			Distributors
North America		96	%		4	%
Outside North America		67	%		33	%
Consolidated		82	%		18	%

CUSTOMERS

Traditional telecommunications service providers are our historical customer base and continue to represent the largest contributors to revenue. We have relationships with major wireless and wireline carriers and broadband service providers around the world. We deliver the technology that enables our customers to offer new products and services and reduce their operating expenses. We see opportunities in growing markets, including: mobile backhaul, packet optical, residential access and optical LANs, as well as professional services.

Revenue from customers within North America was 50% of consolidated revenue in 2012, compared with 51% in 2011, and 70% in 2010. Revenue from customers outside North America was 50% of consolidated revenue in 2012, compared with 49% in 2011 and 30% in 2010.

Carrier consolidation has reduced the number of customers for our products and services. The remaining carriers are large and can exert considerably more pricing pressure than in years past. These carriers may focus their future purchases with a few large suppliers, which could also adversely affect our revenue. In addition, we face more global competition, especially in the newly emerging growth areas we target.

We had one customer for 2012 that contributed more than ten percent of our revenue. Revenue from Verizon (including Verizon Wireless) was 24% of consolidated revenue for 2012, compared with 22% for 2011 and 20% for 2010. Revenue from AT&T was below 10% in 2012, and 2011. Revenue from AT&T was 35% for 2010. No other customer for 2012, 2011 or 2010 accounted for more than 10% of consolidated revenue.

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We have executed product and service supply agreements (“Supply Agreements”) with several of our large customers that detail the commercial terms and conditions for sales. These Supply Agreements are requirements-based and usually do not obligate the customer to a specific volume of business. The vast majority of our sales, whether to customers with Supply Agreements or otherwise, result from periodic purchase orders. A summary of the status of the Supply Agreements with Verizon and AT&T follows:

Verizon. We supply Verizon and its affiliated companies products and services under several agreements, including agreements with companies acquired by Verizon. We provide the following products from our Optical segment: Tellabs 5500 Digital Cross-Connect products, and Tellabs 7100 Optical Transport Systems. In the Data segment, we provide Verizon with the Tellabs 8800 Multiservice Router products. In the Access segment, we provide Verizon with the Tellabs 1600 Optical Network Terminal Series and Tellabs 1000 Multiservice Access Platform. Verizon also procures engineering, furnishing and installation and support services from our Services segment. These products and services are provided under various supply agreements. These supply agreements are with multiple Verizon entities and may include separate products and services or a combination of products and services. The supply agreements also may relate to products in one segment or across multiple segments of our business. These agreements have different expiration dates. The earliest expiration date is December 15, 2013, and the latest expiration date is January 15, 2016. All of these agreements can be extended by written agreement of the parties.

AT&T. We supply AT&T and its affiliated companies products and services under several agreements, including agreements with companies acquired by AT&T. We provide the following products from our Optical segment: Tellabs 5500 Digital Cross-Connect products and the Tellabs 7100 Optical Transport Systems. In the Data segment, we provide AT&T with the Tellabs 8800 Multiservice Router products. In the Access segment we provide AT&T with the Tellabs 1000 Multiservice Access Platform and the Tellabs 1100 Multiservice Access Platform. AT&T procures engineering, furnishing and installation, support services and professional services from our Services segment. These products and services are provided under various agreements. These supply agreements are with multiple AT&T entities and may include separate products and services or a combination of products and services. The supply agreements also may relate to products in one segment or across multiple segments of our business. These agreements have different expiration dates. The earliest expiration date is April 30, 2013, and the latest expiration date is March 31, 2014. All of these agreements can be extended by written agreement of the parties.

We evaluated the materiality of each of these contracts with AT&T and Verizon and have determined that currently none of these contracts with our principal customers is required to be filed as material contracts pursuant to Items 101(c)(1)(vii) and 601(b)(10) of Regulation S-K.

Major service providers require product approval prior to adopting a vendor’s products for use in their networks. We are involved in a continual process of submitting new and succeeding generations of products for approval and our products are widely deployed in these service provider networks. However, we cannot be certain that we will obtain these approvals in the future, or that revenue from these products will continue to occur.

BACKLOG

Total product and service backlog was $305 million at December 28, 2012, and $299 million at December 30, 2011. Backlog is defined as revenue to be recognized on confirmed product and service orders. Of the total backlog, 65% is related to products and 35% is related to services. We expect to ship approximately 90% of the December 28, 2012, product backlog in 2013. We expect to fulfill approximately 80% of the December 28, 2012, services backlog in 2013. We consider backlog to be an indicator, but not the sole predictor, of future revenue.

RESEARCH AND DEVELOPMENT

Tellabs believes the development of new products and enhancement of existing products is vital to our long-term success. We conduct research and development at several facilities around the world. In addition to our internal efforts to develop new products, we undertake research and development and product-oriented acquisitions and

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alliances, from time to time. These alliances provide us access to technology and innovations that we believe will be important to our customers. Research and development expenses were $238.7 million in 2012, compared with $324.1 million in 2011 and $299.7 million in 2010.

MANUFACTURING

We outsource the manufacturing, configuration and system assembly operations for our products to contract manufacturers. Tellabs’ strategy is to use two primary contract manufacturers, although we do have written agreements with other contract manufacturers.

The current concentration of our contract manufacturers is not dependent upon a limited number of suppliers capable of producing our products, but rather the result of a strategic initiative. Consolidating contract manufacturers is a common business model followed in our industry in order to improve production efficiency and innovation resulting from close working relationships with a few key suppliers. Our primary contract manufacturers are Jabil and Flextronics. The facilities owned and operated by these contract manufacturers for the production of our products are located in Malaysia, Mexico, China and the United States. Tellabs can shift production between contract manufacturers without significant impact on production.

Our agreements with contract manufacturers are evergreen or self-renewing and include at least a six-month termination clause in order to minimize the business impact to either party. Tellabs provides a 12-month non-binding rolling forecast. The contract manufacturers procure parts according to production strategy and piece part lead times. Production strategies range from build to forecast, build to order, and replenish to stated inventory levels. The build strategies expose Tellabs to the risk that our customers will not order those products for which we have forecast sales, or will purchase less than we have forecast. As a result, we may incur carrying charges or obsolete material charges for components purchased by our contract manufacturers. We work closely with our contract manufacturers to manage material, quality, cost and delivery times, and we continually evaluate their services to ensure performance on a reliable and cost-effective basis. Each contract manufacturer provides Tellabs with a minimum six-month product warranty.

We require our contract manufacturers to handle and dispose of any hazardous waste material from our manufacturing activities in compliance with all applicable laws and regulations. We perform periodic audits and inspections of our contract manufacturers to verify compliance. The cost of complying with environmental regulations has not had a material impact on capital expenditures, earnings or our competitive position.

As is common in our industry, our products contain components that generally are available from multiple suppliers, as well as components of Tellabs’ proprietary design that are sourced from a single supplier.

In some cases, long lead times may be required to develop alternative sources for proprietary components. If component supplies become limited, which has occurred on occasion, or if a proprietary component supplier is unable to meet our requirements and we cannot quickly source that component from another supplier, the resulting shortages could result in production delays and/or expedite costs that may affect our business adversely. To limit this risk with respect to our single source suppliers, we frequently negotiate for the right to use their technology or to allow a third party to manufacture their products, or require that they maintain a sufficient inventory of components, in the event the supplier were to go out of business or is otherwise unable to meet our requirements.

We typically enter into written agreements with our principal contract manufacturers and suppliers. Under the terms of our typical manufacturing supply agreements with our principal contract manufacturers and suppliers, we are generally not obligated to use their services or purchase their products unless and until we place a firm order. These agreements generally apply to multiple products and across product segments.

INTELLECTUAL PROPERTY

We maintain an active program to legally protect our investment in technology through intellectual property rights. The nature and extent of legal protection associated with each such intellectual property right depends on,

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among other things, the type of intellectual property right and the given jurisdiction in which such right arises. We believe that our intellectual property rights are valuable and important to our business (including each of our segments).

We have various trade and service marks, both registered and unregistered, in the United States and in many foreign countries (collectively, “Marks”). These Marks are important because they differentiate our products and services within our industry. We are not aware of any factor that would inhibit our ability to use any of our major Marks.

We hold numerous U.S. and foreign patents, and we have numerous applications for patents pending in the United States and abroad. Our patents expire at various dates between February 2014 and October 2030. We are not substantially dependent on any single patent. We maintain an active program that seeks to legally protect, through patents, various developments and innovations. There is no assurance, however, that we will be able to obtain or maintain each patent that we pursue or hold. We also cannot predict whether patents that we obtain will necessarily provide us with any competitive advantage or whether such patents will be challenged by third parties. Beyond patents, we rely on copyright, trade secret and other mechanisms designed to help establish, secure, maintain and protect our intellectual property.

Through various licensing arrangements, we grant certain rights to our intellectual property and receive certain rights to intellectual property of others. We expect to maintain current licensing arrangements, as needed, and to secure licensing arrangements in the future, as needed, and to the extent available on reasonable terms and conditions, to support continued development and marketing of our products and services. Some of these licensing arrangements require or may require royalty payments and other licensing fees. The amount of these payments and fees may depend on various factors, including but not limited to, the structure of royalty payments, offsetting considerations, if any, and the degree of use of the licensed technology. There is no assurance; however, that any such license will not be challenged by a third party. We are not substantially dependent on any single license.

We believe that the duration of legal protection for our intellectual property is adequate relative to the expected lives of our products and services.

BUSINESS SEGMENT AND GEOGRAPHICAL INFORMATION

We report operating results for four segments: Optical, Data, Access and Services. Information on revenue by segment, revenue by country and net long-lived assets by country for the fiscal years ended December 28, 2012, December 30, 2011, and December 31, 2010, is included in Note 12, Segment Information, to the consolidated financial statements included in Item 8 of this Form 10-K and is incorporated herein by reference.

EMPLOYEES

At December 28, 2012, we had 2,525 employees. We employed 1,053 individuals in research and product development; 987 in the sales, sales support, customer service and marketing areas; and 485 in support activities. We expect our headcount to decrease in the near term as part of targeted cost-cutting initiatives, which include the workforce reductions announced in January 2012, October 2012, and January 2013. We consider our employee relations to be good. We are not a party to collective bargaining agreements.

EXECUTIVE OFFICERS

The following sets forth certain information regarding our executive officers as of the filing of this Annual Report on Form 10-K.

Michael J. Birck, 75, chairman and co-founder of Tellabs. Chairman since 2000, chief executive officer 2002-2004, chief executive officer and president 1975-2000. Director, Molex Incorporated. M.S.E.E.; New York University; B.S.E.E., Purdue University. Tellabs director since 1975.

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Daniel P. Kelly, 51, president and chief executive officer since 2012. Executive vice president, global products 2007-2012; executive vice president, transport products 2004-2007; various engineering and management positions 1985-2004. M.B.A., University of Chicago; M.S.E.E. and B.S.E.E., University of Notre Dame.

Kenneth G. Craft, 57, executive vice president, product development since 2013. Vice president of global business operations 2008-2013; vice president of North American business solutions 2008; various leadership positions in strategic planning and portfolio management 1979-2008; various technical service positions at Wescom, Inc. 1975-1978. Diploma, Electronics Technology, Devry University.

John M. Brots, 52, executive vice president, global operations since 2005. Vice president of supply chain management 2004; vice president of North American operations 2000-2003; various operations and management positions 1988-2003. M.B.A., St. Edwards University; B.S., Cameron University.

Roger J. Heinz, 50, executive vice president, global sales and services since 2008. President, IP-NGN core business unit at Alcatel-Lucent 2006-2008; vice president, converged IP core solutions; vice president, Sprint sales and various management positions at Lucent Technologies 1999-2006; senior positions at Astral Point Communications, Lucent Technology and AT&T Bell Laboratories 1986-1999. M.S.E.E., Cornell University; B.S.E.E., University of Illinois.

James M. Sheehan, 49, executive vice president, chief administrative officer since 2005 and general counsel and secretary since 2002. Vice president and deputy general counsel 2000-2002; director and assistant general counsel 1995-2000. J.D., University of Illinois College of Law; B.S., University of Illinois.

Andrew B. Szafran, 46, executive vice president, chief financial officer since 2012. Senior vice president and chief financial officer at APAC Customer Services 2005-2008. Prior to that, vice president and chief financial officer at Communications Supply Corporation; senior vice president- finance at Alliant Foodservice (now US Foods). M.B.A., University of Chicago; B.A., Cornell University.

GLOSSARY OF TECHNICAL TERMS

2G Mobile – Wireless networks using digital signals for voice and to enable mobile data services like text messaging.

3G Mobile – Wireless networks built for digital voice and high-speed data, including video.

4G Mobile – The next generation of wireless networks, designed to offer broadband speeds and integrate different types of mobile technology.

Access – Equipment that provides a connection between service providers’ central offices and homes, businesses and other user locations.

Bandwidth – The carrying capacity of a communications channel.

Broadband – A high-bandwidth fiber optic, coaxial or hybrid line with the capacity to carry numerous voice, data and video channels at once.

BPON (Broadband Passive Optical Network) – Fiber-access systems that deliver high bandwidth to homes and businesses.

Control Plane – The part of the router architecture that draws the network map; where routing information is exchanged.

Data – Any network traffic other than voice phone calls. Increasingly, phone calls and video are encoded and transported as data.

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Data Plane – The part of the router architecture that decides what to do with packets arriving on an inbound interface.

Digital – Systems that transport information in the binary 1s and 0s format, like a computer code, to improve clarity and quality.

Digital Cross-Connect – A specialized high-speed data channel switch that connects transmission paths based on network needs (rather than call by call). Digital cross-connects manage and reroute network traffic, and combine, consolidate and segregate signals to maximize efficiency.

DWDM (Dense Wavelength Division Multiplexing) – A way to increase the capacity of optical fiber by carrying multiple wavelengths or colors of light, rather than only one color.

Ethernet – A data network standard to connect computers, printers, workstations, terminals and servers.

Gateway – A network device that acts as an entrance to another network and performs functions including signaling control, QoS and security.

FTTC (fiber-to-the-curb) – Fiber-optic cable extended to and terminated in a small enclosure or on a pole close to the end-user premises, typically within approximately 1,000 feet.

FTTN (fiber-to-the-node, -neighborhood) – Fiber-optic cable extended to and terminated in a street cabinet, possibly several blocks away or even from the end-user premises.

FTTP (fiber-to-the-premises) – Fiber-optic cable extended to and terminated at the end-user premises, such as a box or the outside wall of a home or small business.

GPON (Gigabit Passive Optical Network) – The next generation of fiber-access systems, which delivers four times more bandwidth than BPON.

IP (Internet Protocol) – Rules that enable cooperating computers to share information across a network.

LAN (Local Area Network) – Networking capabilities among a group of computers in close proximity to each other, such as an office building.

LTE (Long Term Evolution) – The next generation of mobile communications services with improved performance and faster speeds.

Managed Access – An access and transport system that simplifies end-to-end management of mobile transport and business services.

Metro Network – A communication network that covers a metropolitan area and connects subscribers and businesses to a larger service network or the Internet.

Mobile – Wireless communications networks that use radio frequencies rather than cables.

Mobile Backhaul – A process of aggregating and transmitting mobile traffic from cell sites to a main transmission network.

Mobile Packet Core – The signaling and gateway core infrastructure in a mobile network for 3G and 4G networks.

MPLS (Multiprotocol Label Switching) – A packet-switching standard that assigns levels of priority to multiple traffic types within a data stream to assure Quality of Service (QoS).

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MSPP (Multiservice Provisioning Platform) – A system that consolidates the number of separate devices needed to provide transport, switching and routing services.

MSR (Multiservice Router) – A network switch that handles both data and the real-time transmission of video and voice with high reliability and quality.

Network – A system of equipment and connections for the transmission of signals that carry voice, video and data.

Network Management – A set of procedures, software, equipment and operations techniques designed to keep a network operating at maximum efficiency.

OLT (Optical Line Terminal) – A device that terminates fiber-access in a service provider’s network.

Optical Network – A communication system using fiber-optics as the means for carrying information between equipment.

ONT (Optical Network Terminal) – A device that connects a fiber-access network to a home, business, or government facility to deliver voice, data and video services.

Optical LAN – High bandwidth LANs that use lower cost GPON technology instead of active Ethernet.

Optical Transport – A technology that transmits communications traffic in the form of laser light over fiber-optic cable.

OTN (Optical Transport Network) – A transport technology that combines multiple transport formats such as Ethernet, IP, SONET and SDH through its multiprotocol abilities.

Packet Optical – A combination of optical, circuit-based TDM and Ethernet functions.

Professional Services – Services such as network optimization, business case analysis and network performance enhancements.

QoS (Quality of Service) – Measurement of the integrity of traffic moving over a network. QoS is especially important for real-time transmissions such as financial transactions and video.

ROADM (Reconfigurable Optical Add/Drop Multiplexer) – A system that enables the remote configuration of any wavelength on any network element, reducing the need to dispatch technicians.

Router – A device that sends Internet Protocol (IP) traffic, or packets, to specific destinations.

SDH (Synchronous Digital Hierarchy) – Transport format for transmitting high-speed digital information over fiber-optic facilities outside of North America, comparable to SONET.

SDN (Software-Defined Network) – An approach to building computer networks that separates and abstracts elements of these systems. These elements are called the “control plane” and the “data plane”. SDN decouples the system that makes decisions about where traffic is sent (the control plane) from the underlying system that forwards traffic to the selected destination (the data plane).

SON (Self-Organizing Network) – A self-organizing function in a mobile network includes processes which require minimum manual intervention. This includes such functions as the process where mobile devices and cell site performance measurements are used to auto-tune the network. It also includes such concepts as plug-and-play of new network elements.

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SONET (Synchronous Optical Network) – Transport format for sending high-speed digital signals through fiber-optics in North America, comparable to SDH.

TDM (Time Division Multiplexing) – Technology that combines multiple streams of traffic by assigning timeslots, sequentially in turn from each input onto a combined higher speed channel.

Transport – The process of moving voice, data or video across communications networks.

VoIP (Voice over Internet Protocol) – The transmission of phone calls over data or Internet links.

Wireless – Mobile networks that use radio frequency rather than cables.

Wireline – Networks that use cables rather than radio frequency.

HOW TO OBTAIN OUR SEC REPORTS

We file annual, quarterly and other periodic reports, proxy statements and other information with the SEC. These filings are available to the public at the SEC’s website at www.sec.gov.

Copies of our most recent annual stockholder report and proxy statement are available directly on the SEC’s website free of charge, as soon as reasonably practicable, after we furnish the material to the SEC. Our website includes direct links to the SEC’s website for our annual, quarterly and other filings. None of the information on our website is incorporated into this report.

Copies of our annual, quarterly and current reports, proxy statements and certain other information filed with the SEC, as well as amendments thereto, are available on our website free of charge. Our website is located at www.tellabs.com. We will provide this information either electronically or in paper form free of charge upon request.

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ITEM 1A. RISK FACTORS

Our operating results will fluctuate, which may cause volatility in our stock price.

Our operating results have varied significantly from quarter to quarter, and those results may continue to fluctuate due to a variety of factors, many of which are beyond our control. These factors include, but are not limited to:

• changing conditions in the U.S. and global economy generally as well as in the telecommunications market specifically;

• an increase in the percentage of our business outside North America;

• the volume and timing of orders from and shipments to customers;

• the timing of, and our ability to obtain, new customer contracts;

• the ability to attract, retain and motivate qualified personnel;

• the ability to maintain solid and healthy customer and supplier relationships and favorable contract terms;

• the timing of, and our ability to recognize revenue for, product and service sales;

• the potential deferral of customer acceptance of new products compared with our existing products;

• the ability to maintain adequate and effective systems to support business processes and sustain the current and future needs of the business;

• the market acceptance of new and enhanced versions of our products and services;

• variations in the mix of products and services we sell, and the demand and market acceptance of those products and services;

• our utilization of production capacity and employees, and our ability to manufacture and ship products efficiently;

• the availability and cost of key components;

• the ability to obtain reliable and high-quality components for our products;

• introductions or announcements of new products by competitors;

• changes in accounting rules and interpretations;

• changes in tax rates, laws or regulations;

• our ability to integrate and operate acquired businesses and technologies;

• the potential impairment of investments, goodwill and intangible assets;

• the ability to prevail or mitigate liability in legal disputes and resulting litigation;

• seasonality, which has often caused revenue to differ from quarter to quarter; and

• the ability to satisfy and comply with applicable laws, rules and regulations in the various locations where we operate our business and sell our products and services, including locations outside North America.

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Our recent operating results may not be a good predictor of our results in future periods. We base our expense levels in part on expectations of future revenue. If revenue levels in a particular period are lower than expected, our operating results will be adversely affected and could result in further restructurings and asset impairments. The failure to meet the expectations of the investment community may cause our stock price to decline, possibly substantially. A significant stock price decline could result in litigation, which could be costly, lengthy and divert management’s attention and resources from business operations.

Economic conditions and uncertain economic outlook could adversely affect our results of operations and financial condition.

The global economy continues to undergo a period of volatility, which has affected the demand for equipment, services and supplies. A further decline could have a material adverse effect on our results of operations and financial condition and exacerbate the other risk factors related to our business. Possible effects of current and future adverse economic conditions on our business include: decrease in purchases or usage of our products and decreased demand for services and supplies by consumers and business customers if increased unemployment leads to lower utilization of telecommunications and Internet services. Our customers or channel partners may stop or decrease purchasing due to their efforts to reduce inventory and conserve cash and/or their inability to obtain financing. We may also experience disruptions in our business due to our inability to obtain equipment, parts and supplies from our suppliers – and our suppliers from their suppliers – if marginal supply businesses fail; collection delinquencies due to insolvency of our customers or shortage of cash to support their businesses; and decrease in our ability to hedge currency exposures due to higher hedging costs because of extreme volatility of exchange rates. In addition, a prolonged economic downturn could impact the viability of our current vision and strategy. If our strategy is not re-evaluated in a timely fashion our future growth and operating results could be adversely impacted. To the extent we are not able to continue to generate ample cash from operations, it may also adversely impact our ability to invest in the growth of our business, repurchase shares or pay dividends.

The market for communications equipment products and services is rapidly changing, very competitive and can fluctuate unpredictably from quarter to quarter.

The market for communications network equipment products and integration services is rapidly changing. Our success will depend in part on our ability to develop and introduce new products and successfully compete with telecommunications equipment providers, particularly those who are larger than us or are in geographies that have lower cost structures. Such competitors may be able and willing to offer lower product and service prices due to product and service bundling, economies of scale, leveraging their incumbent position with a customer, more favorable economic conditions or a desire to capture market share (whether profitable or not). We cannot predict with certainty technological trends or new products in the market, something that our competitors may be able to do more accurately and rapidly. In addition, we cannot predict whether our products and services will meet with market acceptance or profitability. These factors may lead to an inability to successfully compete, which may adversely affect our business, financial condition, operating results or prospects.

Our revenue and results of operations can fluctuate unpredictably from quarter to quarter. Our budgeted expense levels depend in part on our expectations of long-term future revenue and gross margin and substantial reductions in expense are difficult and can take time to implement. Uncertainty or lack of visibility into customer spending, and changes in economic or market conditions, can make it difficult to prepare reliable estimates of future revenue and corresponding expense levels. Consequently, our level of operating expense or inventory may be high relative to our revenue, which could harm our ability to achieve or maintain profitability. Additional factors that contribute to fluctuations in our revenue and operating results include:

• economic and market conditions affecting us and our customers;

• changes in capital spending by large communications service providers;

• the timing and size of orders, including our ability to recognize revenue under customer contracts; and

• variations in the mix between higher and lower margin products and services and the level of pricing pressure we encounter.

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Many factors affecting results of operations are beyond our control, particularly in the case of large service provider orders and multi-vendor or multi-technology network infrastructure builds where the achievement of certain thresholds for acceptance is subject to the readiness and performance of the customer or other providers, and changes in customer requirements or installation plans. As a consequence, our results for a particular quarter may be difficult to predict, and our prior results are not necessarily indicative of results likely in future periods. Capital spending in the telecommunications industry is cyclical and can be curtailed or deferred on short notice even within a quarter so we may not have visibility to the changed behavior until a quarter is almost concluded. The factors above may cause our operating results to fall below the expectations of securities analysts or investors, which may cause our stock price to decline.

Demand for our products may decrease if we do not anticipate and adapt to changing technology and customer requirements.

Communications companies face evolving industry standards, changing market conditions, and frequent introductions of new or enhanced products and services. The introduction of new products and technologies or the adoption of new industry standards can quickly make existing products or products under development obsolete or unmarketable. To grow and remain competitive, we must adapt to these changing technologies and industry standards, enhance our existing solutions and introduce new solutions to address our customers’ changing demands. If our development strategy does not align with our portfolio vision and customer expectations, it could negatively impact our investment in research and development.

In addition, new product developments often require long-term forecasting of market trends, development and implementation of new technologies and processes, and substantial capital commitment. We have invested, and will continue to invest, substantial resources for new product development. We often must make these investments before knowing if the resulting new product will meet with market acceptance or generate revenue. We currently incur costs and expenses in preparation for the deployment of several new products. These costs will precede revenue generation and profits from those products.

We may experience difficulties that could delay or prevent the successful design, development, introduction or marketing of new products. Also, failure to designate appropriate resources, whether internal or external, to develop new products could negatively impact our time to market. These new products and product enhancements must meet the requirements of current and prospective customers and achieve significant market acceptance. Additionally, our competitors are also investing in their products, often times utilizing more resources and higher spending amounts. Their ability to move faster with more resources may provide them with a competitive advantage. Our ability to compete with and outperform our competition is highly dependent upon our ability to execute our development efforts timely and with high quality.

The success of new products depends on several factors, including proper new product definition, component costs, timely completion and introduction of products, differentiation of new products from those of our competitors and market acceptance. We cannot assure that we will successfully identify new product opportunities, develop and bring new products to market in a timely manner or achieve market acceptance of our products. The products and technologies that we pursue may not have the market success we anticipate, and we may not successfully identify and invest in other advanced technologies. If we fail to anticipate or respond on a cost-effective and timely basis to technological developments, changes in industry standards or customer requirements; if we have any significant delays in product development or introduction; or if our products are not accepted in the marketplace to the extent we expect, our business, financial condition, operating results or prospects could be adversely affected.

Our new products will be early in their life cycles and will face challenges for market acceptance and profitability.

We made and will continue to make significant investments in new products. If we do not achieve a balance between declining sales of mature products and increased sales and margins on new products there could be an adverse impact on our operating results. These new products are early in their life cycles and are subject to

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uncertain market demand. They also may face obstacles in manufacturing, deployment and competitive response. Customers may not invest the additional capital required for initial system deployment. Additionally, as customers complete infrastructure deployments, they may require greater levels of service, support and financing than we provided in the past. We cannot ensure that we can provide products, services, support and financing to effectively compete for these market opportunities. We may also be delayed in recognizing revenue related to our new products and related services and may be required to recognize costs and expenses for such products before we can recognize the related revenue. In addition, new products are less profitable (and currently such products are not profitable on an operating income basis) due to higher research and development expenses. Such uncertainty and delay could have a material adverse effect on our business, financial condition, operating results and prospects.

A limited number of our customers represent a large portion of our revenue.

A large portion of our revenue depends on sales to a limited number of customers in specific geographic areas. Traditional telecommunications service providers are our historical customers and continue to represent the largest contributor to our revenue. We cannot assure that these customers will continue to purchase products from us. If a significant existing customer merges with another company, we cannot assure that it will continue to purchase our products at prior levels or at all. In general, these large customers tend to want to do business with a limited number of large suppliers. The loss of one or more large existing customers or a decrease in the level of purchases from these customers could have a material adverse effect on our business, financial condition, operating results and prospects.

Consolidation among our largest customers may lead those combined customers to limit their communications equipment purchases to several large vendors, rather than the current practice of purchasing from a number of different sized vendors. Since we are not among the largest communications equipment vendors, we may lose our ability to sell our products and services to those customers. The loss of our ability to sell to one or more of our large customers could have a material adverse effect on our business, financial condition, operating results and prospects.

Due to our dependence on a large portion of our revenue from a limited number of customers, our bargaining power with respect to prices and contractual terms is often limited. Therefore, we could be, and in some cases have been, required to grant pricing or other concessions to obtain new business or maintain existing business and the resulting pricing may not be sustainable. Such a situation may negatively affect our operating results.

Our revenue depends on the capital spending programs and financial capabilities of our customers and ultimately on the demand for new telecommunications services from their consumer and business customers.

Our primary customers are communications service providers. Our ability to generate revenue depends on the capital spending patterns and financial capabilities of these customers, which in turn depend on the stage of completion of expanding network infrastructures; the availability of funding; and the extent to which our customers are affected by regulatory, economic, and business conditions in the geographic areas where they operate. Additionally, our larger customers typically have long implementation cycles; and often require acceptance provisions, which can lead to revenue deferrals. These conditions adversely affected our operating results in several prior fiscal years and, if these conditions return, could have a material adverse effect on our business, operating results, and financial condition. Further, we cannot assure that network operators or other customers will pursue infrastructure upgrades that require our products and solutions. Infrastructure improvements may be delayed or prevented by a variety of factors including cost, regulatory obstacles, mergers, lack of consumer demand for advanced telecommunications services and alternative approaches to service delivery. Reductions in capital expenditures by companies in the telecommunications industry could seriously harm our revenue, net earnings and cash flows.

Our business would be adversely affected if we are unable to attract and retain key personnel.

Our success depends largely on our ability to attract, develop and retain highly skilled technical, managerial, administrative, sales and marketing personnel. Competition for these personnel is intense and we may fail to

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retain or attract key personnel if we do not provide them with the proper vision, leadership and growth opportunities. The loss of services of any of our key personnel, the inability to retain and attract qualified personnel in the future, or delays in hiring required personnel, particularly engineering and sales personnel, could make it difficult to meet our strategic goals and remain competitive as a technology company.

We are exposed to fluctuations in the market values of our investments and in interest rates; impairment of our investments could have a material effect on our financial statements.

We maintain an investment portfolio of various holdings, types and maturities. These securities are generally classified as available-for-sale and, consequently, are recorded on our Consolidated Balance Sheets at fair value with unrealized gains or losses reported as a separate component of Accumulated other comprehensive income, net of tax. If the fair value declines, we may recognize the decline in earnings below the cost basis when the decline is judged to be other-than-temporary. In addition, certain of our investments are subject to general credit, liquidity, interest rate and market risks. Fluctuating interest rates can add significant variability to interest income. Market risks associated with our investment portfolio may have an adverse effect on our liquidity, financial condition and results of operations. For information regarding the sensitivity of and risks associated with the market value of investments and interest rates, refer to Item 7A of this Form 10-K.

We may not realize expected benefits from restructuring initiatives.

We have restructured our business and reduced our workforce multiple times in response to industry and market conditions. In light of the rapidly changing market for communications equipment, we may have to restructure in the future to achieve certain cost savings and to strategically realign our resources. As we further restructure our business or reduce our workforce, we may be required to record additional liabilities. We cannot predict whether we will realize expected synergies and improved operating performance as a result of any current or future restructuring and streamlining of operations. We also cannot predict whether any restructuring and streamlining of operations will adversely affect our ability to retain key employees, which, in turn, would adversely affect our operating results. Further, in the event the market fluctuates up or down, we may not have the appropriate level of resources and personnel to appropriately react to the change. If we cannot effectively reduce our cost structure while continuing to invest in growth opportunities, we may fail to meet strategic and market expectations, which could have an adverse effect on our operating results, including profitability, and share price.

We operate in a highly competitive industry.

Our products and services continue to face competitive pressures. Our success in competing with other communications equipment providers will depend primarily on the following:

• the price, quality and reliability of our products;

• our engineering, manufacturing and marketing skills;

• our ability to offer differentiated solutions and compete with end-to-end solutions providers;

• our delivery and service capabilities;

• our control of operating expenses and management of assets;

• our overall financial strength and stability; and

• our ability to integrate acquired businesses effectively.

We also may face more intense competition in certain markets. Pricing pressures could increase from current and future competitors and customers. Many current competitors have, and future competitors also may have,

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more engineering, manufacturing, marketing, financial, and personnel resources available to them. Competitors may have better access to such resources and may be better able to attract and retain highly qualified personnel. Consolidation among communications equipment providers as well as entrants into the communications equipment market also may affect competition. As a result, other providers may respond more quickly to new or emerging technologies and changes in customer requirements and be able to offer a wider range of products and services, separately, bundled together or as end-to-end solutions. In addition, technological change, the increasing addition of Internet, data, video, voice and other services to networks, the possibility of regulatory changes and industry consolidation will likely continue to cause rapid evolution in the competitive environment. The full scope and nature of these changes are difficult to predict. Increased competition, particularly from large scale integrators and Asia-based competitors, could lead to price cuts, reduced gross margins and loss of market share, which may adversely affect our business, operating results and financial condition.

Conditions in markets will affect our operations outside North America.

Sales outside of North America generated 50% of our revenue in 2012 and 49% in 2011. Due to our sales outside North America, operations outside North America and research and development organizations, we are subject to the risks of conducting business outside North America. These risks include:

• local economic and market conditions;

• political and economic instability;

• reliance on third parties, who may be competitors, to sell and service our products in certain applications in certain countries;

• reliance on employees and third parties in various geographies to complete product developments;

• unexpected changes in legislative or regulatory requirements;

• fluctuations in currency exchange rates;

• tariffs and other barriers and restrictions, including established relationships between government-controlled carriers and local equipment vendors;

• longer payment cycles;

• difficulties in enforcing intellectual property and contract rights;

• greater difficulty in accounts receivable collection;

• potentially adverse taxes, including any U.S. or foreign taxes imposed on our actual or deemed repatriation of earnings of foreign subsidiaries;

• natural disasters or other events that may create instability;

• potentially lower margins and less certainty of support for customer relationships where foreign sales are made through local distributors; and

• the burdens of complying with a variety of foreign laws and telecommunications standards.

We also are subject to general geopolitical risks, such as political and economic instability and changes in diplomatic and trade relationships. We maintain business operations and have sales in many markets outside North America. Economic conditions in many of these markets represent significant risks. We cannot predict whether sales and business operations in these markets will be adversely affected by these conditions. Instability

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in foreign markets, particularly in Asia, Latin America and the Middle East, could have a negative impact on our business, financial condition and operating results. In addition to the effect of international economic instability on foreign sales, domestic sales to U.S. customers with significant foreign operations could be adversely impacted by these economic conditions, which may adversely affect our business, financial condition and operating results in the future.

We are exposed to fluctuations in currency exchange rates that could negatively impact our financial results and cash flows.

Because we conduct a portion of our business outside the United States, we face exposure to adverse movements in foreign currency exchange rates. These exposures may change over time as business practices evolve, and they could have a material adverse impact on our financial results and cash flows. Additionally, we have exposures to emerging market currencies, which can have extreme volatility. A weakened U.S. dollar will increase the cost of local operating expenses and procurement of raw materials to the extent that we must purchase components in foreign currencies. An increase in the value of the dollar could increase the real cost to our customers outside the United States where we sell in U.S. dollars. Although we have implemented and will implement actions to attempt to limit the impact of currency fluctuations, including hedges, derivatives and other financial instruments, such currency fluctuations could still negatively impact our financial results and cash flows.

We may encounter difficulties obtaining necessary raw materials and supplies.

Our ability to make and service our products and meet customer demands depends on our ability to obtain timely deliveries of important raw materials and supplies within quality standards. The availability of these raw materials and supplies is subject to market forces beyond our control. From time to time there may not be sufficient quantities of raw materials and supplies in the marketplace to meet the customer demand for our products. In addition, the costs to obtain these raw materials and supplies are subject to price fluctuations. Many companies use the same raw materials and supplies to produce their products that we use to produce our products. Companies with more resources may have a competitive advantage in obtaining raw materials and supplies due to greater buying power; and this risk could increase should any of our competitors expand their operations through vertical integration of our supply base. Reduced supply or higher prices for raw materials and supplies may adversely affect our business, operating results and financial condition. In addition, we currently purchase certain key components from sole or limited-source vendors, and most of our component purchases are on a purchase-order basis without guaranteed supply arrangements. If supply is disrupted, we may be unable to find an alternative source in a timely manner, at favorable prices or of acceptable quality. These circumstances may limit our ability to meet scheduled deliveries to customers and may increase our expenses.

We depend on contract manufacturers and third-party customer service providers.

We have purchase agreements with contract manufacturers that require them to buy the components used to manufacture our products and authorize them to buy components in accordance with agreed-upon lead times. As customers increasingly demand shorter delivery timeframes, the difficulty of accurately forecasting component needs creates additional risk. Failure to estimate requirements accurately can lead to monetary penalties, excess or obsolete inventory, or manufacturing disruptions. Further, since we do not, in every instance, have a contractual relationship with suppliers to our contract manufacturers, we are subject to and dependent on the terms of the agreements between the contract manufacturer and the supplier. As a result, we have limited ability to take legal action against suppliers if a component fails or is outside of the quality standards we set. In addition, the contract manufacturers may not allocate sufficient resources to the timely completion of our orders in accordance with our quality standards, which may result in significant interruptions in the supply of products to our customers. Further, if supply to our contract manufacturers is disrupted, we may be unable to find an alternative source in a timely manner, at favorable prices or of acceptable quality. These circumstances may limit our ability to meet scheduled deliveries to customers and may increase our expenses.

We rely on a small number of contract manufacturers to perform the majority of our product manufacturing. The qualification of these manufacturers is an expensive and time-consuming process, and these manufacturers build

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products for other companies, including our competitors. We constantly review their manufacturing capability to ensure they meet our production requirements in terms of cost, capacity and quality. Periodically, we may decide to transfer the manufacturing of a product from one contract manufacturer to another to better meet our production needs. It is possible that we may not effectively manage this transition or the new contract manufacturer may not perform as well as expected. As a result, we may not be able to fill orders in a timely manner, which could harm our business. These limitations and the failure to deliver products on time may adversely affect our business, operating results and financial condition.

We rely on the use of third-party customer service providers to deliver and install products. We depend on such third-party agents to perform key on-site services for our customers. We cannot control the availability of such resources or the quality of the services provided by such third parties. Scarcity of resources, price fluctuations, and quality or delivery issues may adversely affect our business, operating results and financial condition.

We may be unable to sell certain inventory, which could result in lower gross profit margins and net earnings.

Some customer requirements include specific configurations of our products, for which we procure the related component parts. In many cases, we forecast and purchase components in advance. If customers do not place orders, if their requirements change, or if they cancel orders, we may be unable to cost-effectively rework these components and/or return them to inventory as available-for-sale. Write-downs and accruals for unrealizable inventory will negatively impact our gross profit margins and net earnings.

Intellectual property rights may not be adequate to protect our business.

Our future success depends in part on our intellectual property, including our proprietary technology and innovations. We have attempted to protect our intellectual property through various mechanisms such as patents, copyrights, trademarks, licensing arrangements, contractual obligations and trade secrets. We cannot be assured however, that the patents we obtain and other intellectual property rights that we hold will necessarily provide us with any competitive advantage. Third parties may attempt to use our intellectual property without authorization. It is difficult to police the unauthorized use of our intellectual property, particularly in certain foreign countries, the laws of which may not protect intellectual property rights to the same extent as the laws of the United States. Litigation may be necessary to enforce our intellectual property rights, which could be costly and disruptive; there is no guarantee that we will obtain a successful result, no matter how much time, money and energy we spend on litigation. In addition, competitors and others may develop competitive technology independently without violating our proprietary rights. Some of our products may include open source software, and while we monitor the use of open source software, our ability to commercialize products or technologies incorporating open source software may be restricted because, among other factors, open source license terms may be unclear and may result in unanticipated obligations regarding our product offerings. Any inability to secure, protect or enforce proprietary rights could result in loss of any competitive advantage, loss of customer orders and decreased revenue.

We are and may be subject to additional intellectual property infringement claims that are costly and time-consuming to defend. These claims could limit our ability to use some technologies.

As competition in the communications equipment industry increases and the functionality of the products in this industry converges, companies in the industry increasingly become the target of infringement claims and other intellectual property disputes. Third parties have and may in the future assert infringement claims against us or our customers or partners in connection with our products, services or other aspects of our business. From time to time we receive notices or claims based on third-party patents or other proprietary rights, including notices or claims that may originate from competitors. Any such third parties may choose to litigate their claims, or we may pursue litigation to determine the scope and validity of any such proprietary rights. We may be unsuccessful in any such litigation. We may be unable to secure, on commercially reasonable terms, any licenses that we seek. Third-party claims, whether with or without merit, potentially can result in:

• costly litigation;

• the diversion of management’s time, attention and resources;

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• the delay or cessation of product shipments or services delivery;

• the payment of damages;

• the requirement to enter into royalty-bearing licensing arrangements or to obtain substitute technology of lower quality or higher cost; or

• the requirement to release source code to third parties under open source license terms or otherwise; or

• the imposition of obligations or restrictions that could adversely affect our business, financial condition and operating results.

Product quality or performance problems could impact our business.

The development and production of new products with high technology content often involves problems with components and manufacturing methods. If significant problems in reliability, quality or network monitoring develop, including those due to hardware or software defects in product, a number of negative effects on our business could result, including:

• costs to fix defects;

• high service and warranty expenses;

• payment of liquidated damages for performance failures;

• high inventory obsolescence expense;

• high levels of product returns;

• customers do not accept our products;

• delays or interruptions in product turn-up;

• delays in collecting accounts receivable;

• reduced orders from existing customers; and

• declining interest from potential customers.

We may be unable to identify, complete or benefit from strategic acquisitions, investments and dispositions.

Our long-term growth strategy includes building value for the Company through a variety of methods. These methods may include acquisition of, investment in, or joint ventures in, adjacent or complementary businesses, products, services or technologies and potential divestitures of certain portions of our business.

We cannot assure that we will be able to identify suitable parties for these transactions. If we are unable to identify suitable parties for strategic transactions we may not be able to capitalize on market opportunities with existing and new customers, which could inhibit our ability to gain market share. Even if we identify suitable parties to participate in these transactions, we cannot assure that we will be able to make them on commercially acceptable terms, if at all.

If we acquire a company, it may be difficult to assimilate its businesses, products, services, technologies and personnel into our operations. These difficulties could disrupt our ongoing business, distract our management and workforce, increase our expenses and adversely affect our operating results and ability to compete and gain market share. Mergers and acquisitions of high-technology companies are inherently risky and are subject to

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many factors outside our control. No assurance can be given that our previous or future acquisitions will be successful and will not materially adversely affect our business, operating results, or financial condition. In addition, we may incur debt or be required to issue equity securities to pay for future acquisitions or investments. The issuance of any equity securities could be dilutive to our stockholders. We also may need to make further investments to support the acquired company and may have difficulty identifying and acquiring appropriate resources. If we divest or otherwise exit certain portions of our business, we may be required to record additional expenses, for items such as workforce reduction costs, closure of excess facilities and excess inventory write-offs. Furthermore, estimates with respect to the useful life and ultimate recoverability of our carrying basis of assets, including goodwill and purchased intangible assets, could change as a result of such disposition.

Our reported financial results could suffer if there is an impairment of goodwill or other intangible assets.

We are required to annually test our goodwill to determine if impairment has occurred. For evaluation purposes, each segment with a goodwill balance is reviewed for possible goodwill impairment. Goodwill impairment is reviewed annually and when impairment indicators exist, by comparing the segment’s net carrying value to fair value. If the segment’s fair value is greater than its carrying value and no other impairment indicators exist, further impairment tests are not deemed necessary and no impairment loss is recorded. If intangible assets are deemed to be impaired, an impairment loss equal to the amount by which the carrying amount exceeds the fair value of the assets would be recognized. Events or circumstances could arise in the future that may create a need to record an impairment adjustment relating to our goodwill or other intangible assets that could have a material adverse effect on our financial statements.

We could identify a material weakness in our internal control over financial reporting which could, if not remediated, result in additional material misstatements in our financial reporting.

Our management is responsible for establishing and maintaining adequate internal control over our financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act. A material weakness is defined as a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis. If our internal controls are not adequate a material weakness in our internal controls could result in our consolidated financial statements to be materially misstated and we could be required to restate our financial results.

We are subject to numerous and changing industry regulations and standards.

Our products must comply with a significant number of communications industry technological regulations and standards, which vary between the United States and other markets. Our products also must interoperate with third-party products. Testing to ensure compliance with technological standards and interoperability requires significant time and money. If we fail to ensure compliance with evolving standards and regulations in a timely manner or fail to maintain interoperability with equipment from other companies, we could experience customer contract penalties, delayed or lost customer orders, decreased revenue and reduced net earnings that may adversely affect our business, financial condition and operating results. To remain competitive, and in some cases remain compliant with customer requirements, we also must meet requirements for industry certifications such as ISO (International Organization for Standardization) and TL 9000, a quality management system developed for the telecommunications industry.

We operate in an industry subject to changing government regulations.

The communications equipment industry is subject to government regulation in the United States and other countries. Our business depends on the continued growth of the telecommunications industry worldwide. Federal and state agencies regulate most of our domestic customers, and foreign customers also are subject to regulation. In particular, there may be future changes in U.S. telecommunications regulations that could slow the expansion of service providers’ network infrastructures and adversely affect our business, operating results and financial condition. Future changes in tariffs by regulatory agencies or application of tariff requirements to

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currently untariffed services could adversely affect the sales of our products for certain classes of customers. Moreover, uncertainty regarding future legislation and government policies combined with emerging competition may also affect the demand for our products. Competition could intensify as a result of future regulatory changes or new regulations in the markets where we operate and sell our products and services, which could adversely affect our business, operating results and financial condition.

Changes in effective tax rates or adverse outcomes resulting from examination of our income or other tax returns could adversely affect our results.

Our future effective tax rates could be subject to volatility or adversely affected by: earnings being lower than anticipated in countries where we have lower statutory rates and higher than anticipated earnings in countries where we have higher statutory rates; by changes in the valuation of our deferred tax assets and liabilities; by expiration of or lapses in the R&D tax credit laws; by tax effects of stock-based compensation; by costs related to intercompany restructurings; or by changes in tax laws, regulations, accounting principles, or interpretations thereof. In addition, we are subject to the continuous examination of our income tax returns by the Internal Revenue Service (IRS) and other tax authorities. We regularly assess the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of our provision for income taxes. Although we have accrued tax and related interest for potential adjustments to tax liabilities for prior years, there can be no assurance that the outcomes from these continuous examinations will not have a material effect, either positive or negative, on our business, financial condition and results of operations.

Our failure or the failure of our contract manufacturers to comply with applicable laws and regulations worldwide could adversely impact our business and results of operations.

The manufacture, assembly and testing of our products may require the use of hazardous materials that are subject to a broad array of environmental, health and safety laws and regulations. Our failure or the failure of our contract manufacturers to comply with any applicable laws or regulations could result in:

• regulatory penalties, fines and legal liabilities;

• suspension of production; or

• curtailment of our operations or sales.

In addition, our failure or the failure of our contract manufacturers to properly manage the use, transportation, emission, discharge, storage, recycling or disposal of hazardous materials could subject us to increased costs or future liabilities. Existing and future environmental laws and regulations may restrict our use of certain materials to manufacture, assemble and test products. Any of these consequences could adversely impact our business and results of operations by increasing our expenses and/or requiring us to alter our manufacturing processes.

If we are not able to build, sustain and utilize proper information technology infrastructure effectively, our business could suffer.

We depend on information technology as an enabler to improve the effectiveness of our operations and to interface with our customers, as well as to maintain financial accuracy and efficiency. If we do not allocate and effectively manage the resources (whether internal or external) necessary to build, sustain and utilize the proper technology infrastructure, we could be subject to transaction errors, processing inefficiencies, the loss of customers, inaccurate or incomplete data, business disruptions, or the loss of or damage to intellectual property through security breach.

As our operations grow in both complexity and scope, we will continually need to improve and upgrade our systems and infrastructure while maintaining the reliability and integrity of our systems and infrastructure. The expansion of our systems and infrastructure may require us to commit substantial financial, operational and technical resources before the volume of our business increases, with no assurance that the volume of business will increase. Any other upgrades to our systems and information technology, or new technology, now and in the future,

23

will require that our management and resources be diverted from our core business to assist implementation of such upgrades or new technology. There can be no assurance that the time and resources our management will need to devote to these upgrades, service outages or delays due to the installation of any new or upgraded technology (and customer issues therewith), or the impact on the reliability of our data from any new or upgraded technology will not have a material adverse effect on our business, financial condition or results of operations.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES

Our corporate headquarters is located in Naperville, Illinois, approximately 32 miles west of Chicago. At December 28, 2012, we operated 41 facilities globally, totaling 934,000 square feet to support:

• Corporate and administration: 142,000 square feet.

• Research and development: 431,000 square feet, of which 39% was used by the Optical segment, 52% was used by the Data segment and 9% was used by the Access segment.

• Operations: 147,000 square feet

• Sales and services: 214,000 square feet.

We own 646,000 square feet of the total, which includes our headquarters facility and three facilities in Espoo, Finland. We lease facilities in 28 countries that total 288,000 square feet, including 7 facilities in North America; 14 facilities in Europe, Middle East and Africa; 13 facilities in the Asia Pacific region and 3 facilities in South America.

Our significant leases (greater than 10,000 square feet) included 99,000 square feet in North America; 15,000 square feet in Europe, Middle East and Africa; and 73,000 square feet in Asia Pacific. These leases are non-cancelable and expire on various dates through 2017.

We own substantially all of our equipment used in our business, other than that related to outsourced activities. We believe our facilities are in good condition and are suitable and adequate for our current needs.

ITEM 3. LEGAL PROCEEDINGS

The information set forth under Note 14, Contingencies – Legal Proceedings, to the consolidated financial statements included in Item 8 of this Form 10-K is incorporated herein by reference.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

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FORWARD-LOOKING STATEMENTS

Except for historical information, the matters discussed or incorporated by reference into this report may contain forward-looking statements made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements reflect management’s expectations, estimates and assumptions, based on current and available information at the time the document was prepared. These forward-looking statements include, but are not limited to, statements regarding future events, plans, goals, objectives and expectations. The words “anticipate,” “believe,” “estimate,” “target,” “expect,” “predict,” “plan,” “possible,” “project,” “intend,” “likely,” “will,” “should,” “could,” “may,” “foreseeable,” “would” and similar expressions are intended to identify forward-looking statements. Forward-looking statements are not guarantees of future performance and involve risks, uncertainties and other factors that may cause our actual performance or achievements to be materially different from any future results, performance or achievements expressed or implied by those statements. Important factors that could cause our actual results to differ materially from those in forward-looking statements include, but are not limited to: successful expansion into adjacent markets with new and existing products and platforms; new product acceptance and profitability; our ability to compete with larger suppliers that can provide end to end solutions; customer concentration; the impact of customer and vendor consolidation; overall negative economic conditions generally and disruptions in credit and capital markets, including specific impacts of these conditions on the telecommunications industry; foreign economic conditions, including currency rate fluctuations; financial condition of telecommunications service providers, equipment vendors and contract manufacturers, including the impact of any bankruptcies; availability of components and critical manufacturing equipment and capacity; product demand and industry capacity; competitive products and pricing; competitive pressures from new entrants to the telecommunications industry; initiatives to improve profitability that may have financial consequences, including further restructuring charges and the ability to realize anticipated savings under such cost-reduction initiatives; exiting businesses and product areas; impairment charges and other cost cutting initiatives and related charges and costs; manufacturing efficiencies; research and new product development; protection of and access to intellectual property, patents and technology; ability to attract and retain highly qualified personnel; the regulatory and trade environment; the impact of new or revised accounting rules or interpretations, including revenue recognition requirements; availability and terms of future acquisitions; divestitures and investments; uncertainties relating to synergies; charges and expenses associated with business combinations and other transactions; and other risks and future factors that may be detailed from time to time in the Company’s filings with the SEC. For a further description of such risks and future factors, see Item 1A of this Form 10-K. Our actual future results could differ materially from those predicted in such forward-looking statements. In light of the foregoing risks, uncertainties and other factors, investors are advised not to rely on these forward-looking statements when making investment decisions. These factors are not intended to be an all-encompassing list of risks and uncertainties that may affect the operations, performance, development and results of our business. We undertake no obligation to publicly update or revise any forward-looking statements to reflect changed assumptions, the occurrence of anticipated or unanticipated events or changes to future results over time. The foregoing discussion should be read in conjunction with Item 1A, Risk Factors, Item 7, Management’s Discussion and Analysis of Results of Operations and Financial Condition and Item 8, Financial Statements and Supplementary Data of this Form 10-K.

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Tellabs’ common stock is listed on the NASDAQ Global Select Market under the symbol “TLAB.” As of February 15, 2013, there were approximately 4,712 stockholders of record and 356,185,970 outstanding shares. There are also stockholders holding stock in street name. The following tables set forth the high and low common stock prices on the NASDAQ and dividends declared per common share:

2012
	High		Low		Cash Dividends Per Share
First Quarter	$	4.41	$	3.75	$	0.02
Second Quarter	$	4.10	$	3.19	$	0.02
Third Quarter	$	3.86	$	2.91	$	0.02
Fourth Quarter1	$	3.63	$	2.30	$	1.02

2011
	High		Low		Cash Dividends Per Share
First Quarter	$	7.31	$	4.87	$	0.02
Second Quarter	$	5.47	$	3.98	$	0.02
Third Quarter	$	4.68	$	3.67	$	0.02
Fourth Quarter	$	4.75	$	3.78	$	0.02

¹ Includes a special dividend of $1 per share.

We repurchase outstanding common stock under two plans authorized by our Board of Directors. In addition, we purchase shares to cover withholding taxes on shares issued under employee stock plans.

We intend to continue to use cash generated by employee stock option exercises (other than those of Company officers and board members) to repurchase stock through the use of a 10b5-1 plan. As of December 28, 2012, we have purchased 8.5 million shares of our common stock under this plan since February 2006, at a total cost of $101.4 million, including $0.1 million (27 thousand shares) in 2012, and $0.6 million (0.1 million shares) in 2011. On November 29, 2012, our Board of Directors authorized a one-year extension of this plan.

We intend to continue to make repurchases of our outstanding common stock under a previously authorized $600 million repurchase plan. As of December 28, 2012, we have purchased 56.6 million shares of our common stock under the $600 million repurchase plan at a total cost of $375.4 million, leaving $224.6 million available to be purchased under this plan. We purchased $22 thousand (9 thousand shares) in 2012. We did not purchase any shares under this plan in 2011.

We may change our repurchase activity and we provide no assurance that we will continue our repurchase activity in the future.

In addition, during 2012 we purchased 1.0 million shares for $3.7 million to cover minimum withholding taxes on shares issued under employee stock plans. In 2011, we purchased 0.9 million shares for $4.5 million to cover minimum withholding taxes on shares issued under employee stock plans.

We record repurchased shares as Treasury stock.

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Repurchases of Common Stock:

Period of Purchases	Total Number of Shares Purchased		Average Purchase Price Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		Remaining Dollar Value of Shares Available to be Purchased Under the Programs (In millions) 1
9/29/12 through 11/2/12		—	$	—		—	$	224.6
11/3/12 through 11/30/12		87	$	2.90		87	$	224.6
12/1/12 through 12/28/12		17,821	$	2.81		17,821	$	224.6
Total		17,908	$	2.81		17,908

¹  The amounts in this column represent the remaining amounts under the current $600 million program described above. The Rule 10b5-1 repurchase program described above does not have a repurchase amount limit; therefore, it is not included in the remaining value of shares.

Stock Performance Graph

The following graph shows a five-year comparison of the cumulative total shareholder return on Tellabs common stock with the cumulative total returns of a peer group (the Dow Jones U.S. Telecommunications Index, the Standard and Poor’s (S&P) 400 MidCap Index, the S&P 500 Index and the NASDAQ composite index. For 2012, Tellabs was moved from the S&P 500 Index to the S&P 400 MidCap Index because its market capitalization was more representative of the mid cap market space. The graph tracks the performance of a $100 investment in the Company’s common stock and in each of the indexes (with the reinvestment of all dividends) on January 2, 2008.

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ITEM 6. SELECTED FINANCIAL DATA

5-Year Summary of Selected Financial Data (Unaudited)

In millions, except per-share, employee and stockholder data	2012 1			2011 3			2010			2009			2008 4
Statement of Operations Data
Revenue	$	1,052.6		$	1,285.7		$	1,642.3		$	1,525.7		$	1,729.0
Gross profit	$	406.9		$	508.3		$	789.6		$	665.8		$	660.1
Operating (loss) earnings	$	(156.7	)	$	(202.9	)	$	173.7		$	93.5		$	(970.0	)
(Loss) earnings before income tax	$	(148.6	)	$	(195.0	)	$	191.5		$	113.2		$	(952.5	)
Net (loss) earnings	$	(171.7	)	$	(188.4	)	$	155.6		$	113.6		$	(930.1	)
Net (loss) earnings per share	$	(0.47	)	$	(0.52	)	$	0.41		$	0.29		$	(2.32	)
Net (loss) earnings per share – diluted	$	(0.47	)	$	(0.52	)	$	0.41		$	0.29		$	(2.32	)
Cash dividends per share	$	1.08		$	0.08		$	0.08		$	—		$	—
Weighted average shares outstanding – diluted		367.0			364.5			382.7			394.2			400.1
Balance Sheet Data
Total assets	$	1,638.1		$	2,248.0		$	2,602.9		$	2,622.8		$	2,511.2
Total liabilities	$	536.8		$	603.3		$	741.4		$	707.9		$	664.7
Stockholders’ equity	$	1,101.3		$	1,644.7		$	1,861.5		$	1,914.9		$	1,846.5
Other Information
Net cash provided by (used for) operating activities	$	45.1		$	(49.1	)	$	288.8		$	229.7		$	133.6
Working capital	$	720.1		$	1,166.7		$	1,249.7		$	1,288.7		$	1,376.2
Research and development expense	$	238.7		$	324.1		$	299.7		$	268.7		$	305.2
Return on average stockholders’ equity		(12.5	)%		(10.7	)%		8.2	%		6.0	%		(39.1	)%
Stock price at year-end	$	2.34		$	4.04		$	6.78		$	5.68		$	4.20
Number of employees		2,525			3,246			3,413			3,295			3,228
Number of stockholders 2		4,712			5,723			5,818			6,961			7,088

¹  Includes a special dividend of $1 per share.

²  For 2012, represents the number of stockholders at February 15, 2013. For 2011, represents the number of stockholders at February 17, 2012. For 2010, represents the number of stockholders at February 18, 2011. For 2009, represents the number of stockholders at February 12, 2010. For 2008, represents the number of stockholders at February 20, 2009.

³ Includes non-cash goodwill and in-process research and development (IPR&D) impairment charges of $102.7 million.

⁴ Includes a non-cash goodwill impairment charge of $988.3 million.

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND FINANCIAL CONDITION

Introduction and Overview of Business

Tellabs designs, develops and supports telecommunications networking products. We generate revenue principally through the sale of these products to communications service providers worldwide as both stand-alone network elements and as elements of solutions integrated under a common network management system. We also generate revenue by providing services to our customers.

Prior to the second quarter of 2012, Tellabs reported results of operations for three reporting segments: Broadband, Transport, and Services. As a result of strategy changes and internal reorganizations at the beginning of the second quarter of 2012, Tellabs is focusing on the Packet Optical (primarily our optical portfolio) and Mobile Backhaul (primarily our data portfolio) markets in addition to the on-going Access and Services businesses. With these strategic adjustments, we changed our reporting segments accordingly. Therefore, beginning with the second quarter of 2012, we have reported in the following four segments: Optical, Data, Access and Services (the Services segment was unchanged).

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Optical segment products are primarily used to manage large volumes of telecommunication traffic in metro areas. The Optical segment includes the Tellabs^® 5000 Series of Digital Cross-Connect systems, the Tellabs^® 6300 Managed Transport System, the Tellabs^® 7100 OTS and the Tellabs^® 7300 Metro Ethernet Switching Series.

Data segment products are primarily used in mobile backhaul applications, and for business services and various edge routing applications. The Data segment includes the Tellabs^® 8100 Managed Access Systems and the Tellabs 8600 and 8800 Smart Routers.

Access segment products are primarily used to enable service providers to bundle Internet, video, and voice over high-speed fiber-based networks and in Optical LAN applications. The Access segment includes the Tellabs^® 1000 and 1100 Multi-service Access systems, and the Tellabs^® 1600 Optical Network Terminals.

The Services segment delivers deployment, training, support and professional services to Tellabs’ customers. Through these offerings, Tellabs serves its customers through the phases of planning, deploying and operating a network.

As customers migrate to new technologies, revenue from earlier-developed products and services declines and overall corporate profitability suffers. This situation is compounded when customers are slow to adopt our newer products and services. In the face of these market conditions, Tellabs is targeting near-term nominal profitability while streamlining its costs and operating expenses with the goal of managing research and development to enhance Tellabs solutions for future revenue growth.

Results of Operations

Net loss for the year 2012 was $171.7 million, compared with net loss of $188.4 million in 2011 and net earnings of $155.6 million in 2010.

In 2012, revenue was $1,052.6 million, compared with $1,285.7 million in 2011 and $1,642.3 million in 2010. Revenue decreased across all segments in 2012 and 2011.

In 2012, gross margin was 38.7%, compared with 39.5% in 2011 and 48.1% in 2010. The decline in gross margin in 2012 from 2011 was primarily a result of the lower overall level of revenue. The decline in gross margin in 2011 from 2010 was primarily the result of lower revenue from digital cross-connect systems and data products in North America.

Operating expenses in 2012 were $563.6 million, compared with $711.2 million in 2011 and $615.9 million in 2010. For the year 2012, lower research and development, sales and marketing and general and administrative expenses were partially offset by $119.0 million in restructuring and other charges. For the year 2012, restructuring and other charges are due to facility- and asset-related charges ($38.4 million), severance ($32.9 million) and accelerated amortization for abandoned intangible assets ($47.7 million) related to mobile packet-core technology. For the full-year 2011, lower sales and marketing, general and administrative expenses, and intangible asset amortization were more than offset by increased research and development expenses, restructuring and other charges, and the $102.7 million goodwill and in-process research and development (IPR&D) impairments incurred in the third quarter of 2011.

Segment Revenue

In millions	2012		2011		2010		2012 vs. 2011			2011 vs. 2010
Optical	$	432.0	$	482.1	$	644.2		(10.4	)%		(25.2	)%
Data		265.5		413.9		557.7		(35.9	)%		(25.8	)%
Access		156.5		166.4		198.1		(5.9	)%		(16.0	)%
Services		198.6		223.3		242.3		(11.1	)%		(7.8	)%
Total revenue	$	1,052.6	$	1,285.7	$	1,642.3		(18.1	)%		(21.7	)%

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Segment Revenue

Optical revenue was $432.0 million in 2012, compared with $482.1 million in 2011 and $644.2 million in 2010. In 2012, revenue decreased across all products in the segment. In 2011, increased revenue from optical transport systems was offset by lower revenue from digital cross-connect systems.

Data revenue was $265.5 million in 2012, compared with $413.9 million in 2011 and $557.7 million in 2010. In 2012, revenue decreased across all products in the segment. In 2011, increased revenue from managed edge systems was offset by lower revenue from smart routers.

Access revenue was $156.5 million in 2012, compared with $166.4 million in 2011 and $198.1 million in 2010. In 2012, higher revenue from single-family ONTs was more than offset by lower revenue from access systems. In 2011, access revenue declined primarily due to lower revenue from single-family ONTs.

Revenue from Services was $198.6 million 2012, compared with $223.3 million in 2011 and $242.3 million in 2010. In 2012, the decline in Services segment revenue was driven primarily by lower deployment and professional services revenue and the adjustment for business taxes described below under Services Gross Margin. In 2011, the decline in Services segment revenue was driven primarily by lower deployment services revenue, which was partially offset by higher professional and support services revenue.

Geographic Revenue

In millions	2012		%			2011		%			2010		%
North America	$	522.9		50	%	$	649.4		51	%	$	1,142.6		70	%
Outside North America		529.7		50	%		636.3		49	%		499.7		30	%
Total revenue	$	1,052.6		100	%	$	1,285.7		100	%	$	1,642.3		100	%

Geographic Revenue

In 2012, revenue declined in all geographic regions. In 2011, increased revenue from all geographic regions outside North America was offset by lower revenue from wireline and wireless customers in North America.

Gross Profit and Margin

In millions	2012			2011			2010
Gross profit	$	406.9		$	508.3		$	789.6
Gross margin		38.7	%		39.5	%		48.1	%
Product gross profit	$	338.6		$	435.1		$	710.7
Product margin		39.7	%		41.0	%		50.8	%
Services gross profit	$	68.3		$	73.2		$	78.9
Services margin		34.4	%		32.8	%		32.6	%

Gross Margin

Overall gross margin decreased 0.8 percentage points in 2012 after declining 8.6 percentage points in 2011. Product gross margin declined 1.3 percentage points in 2012 after declining 9.8 percentage points in 2011. Services gross margin increased 1.6 percentage points in 2012 after increasing 0.2 percentage points in 2011.

Product Gross Margin

Product gross margins decreased in 2012 from 2011, driven primarily by the lower overall level of product revenue. In addition, we recorded an $8.1 million charge in the fourth quarter of 2012 for inventory and purchase commitments related to the discontinued 9200 product. The decline in product gross margin in 2011 from 2010 is the result of lower revenue from digital cross-connect systems and data products, which carry gross margins higher than the corporate average. Product gross margin in 2010 also included a $16.5 million charge for excess purchase commitments.

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Services Gross Margin

Services gross margins increased in 2012, compared with 2011, primarily as a result of lower revenue from deployment services, partially offset by an adjustment for business taxes on sales transactions involving deployment services in a foreign jurisdiction in the second quarter of 2012. The increase in services gross margin in 2011 from 2010 was driven primarily by a mix shift from lower-margin deployment services to higher-margin professional services and improved profitability for professional services.

Gross Margin Trend

Gross margin is different for each product and services category and for each product within a category because the actual margin depends on the specific system configuration sold as well as customer and geographic pricing differences. This variability, which tends to affect gross margin on a quarterly basis, is likely to continue.

Operating Expenses

	Expense						Percent of Revenue
In millions	2012		2011		2010		2012			2011			2010
Research and development	$	238.7	$	324.1	$	299.7		22.7	%		25.2	%		18.2	%
Sales and marketing		126.4		163.0		179.3		12.0	%		12.7	%		10.9	%
General and administrative		74.1		80.9		100.4		7.0	%		6.3	%		6.1	%
Subtotal		439.2		568.0		579.4		41.7	%		44.2	%		35.3	%
Intangible asset amortization		5.4		20.2		27.0
Restructuring and other charges		119.0		20.3		9.5
Goodwill and IPR&D impairment		—		102.7		—
Total operating expenses	$	563.6	$	711.2	$	615.9

Operating Expenses

In 2012, lower research and development, sales and marketing, and general and administrative expenses were partially offset by $119.0 million in restructuring and other charges. The increase in operating expenses in 2011 from 2010 was driven by increased research and development expenses, the goodwill and IPR&D impairment incurred in the third quarter of 2011, and increased restructuring and other charges, which were partially offset by lower general and administrative and sales and marketing expenses.

Intangible Asset Amortization

The decline in intangible asset amortization in 2012 from 2011 was due to the write-down of abandoned intangible assets related to the mobile packet-core technology in the first quarter of 2012. The decline in intangible asset amortization in 2011 from 2010 was due to certain intangibles reaching full amortization.

Restructuring and Other Charges

In 2012, restructuring and other charges are due to facility- and asset-related charges ($38.4 million), severance ($32.9 million) and accelerated amortization for abandoned intangible assets ($47.7 million) related to the mobile packet-core technology. In 2011 and 2010, restructuring and other charges consisted primarily of severance and facility- and asset-related charges.

Goodwill Impairment

In the third quarter of 2011, we performed an interim goodwill impairment review on our Data segment (previously Broadband segment) because we continued to experience a significant decline in business volumes from a major customer that had an adverse impact on the results of the Data segment, and our overall market capitalization continued to fall below carrying value. We determined that the fair value of the identifiable net assets, excluding goodwill, was greater than the fair value of the segment, resulting in no value attributable to goodwill. Consequently, the financial results for the third quarter of 2011 included an impairment charge for the full amount of Data segment goodwill, amounting to $82.7 million. The Services segment did not incur an impairment of its goodwill since its fair value was determined to be greater than its carrying value.

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IPR&D Impairment

In conjunction with the interim goodwill impairment review, we assessed the valuation of our indefinite-lived intangible assets, which consisted of IPR&D in the third quarter of 2011. Updated management projections related to the IPR&D from the WiChorus acquisition in 2009 resulted in an impairment charge in the third quarter of 2011 of $20.0 million.

Segment Profit (Loss)*

In millions	2012			2011			2010
Optical	$	89.6		$	93.3		$	218.3
Data		(6.8	)		(6.6	)		168.4
Access		31.9			34.1			34.5
Services		70.0			75.3			81.2
Total segment profit	$	184.7		$	196.1		$	502.4

* We define segment profit (loss) as gross profit less research and development expenses. Segment profit (loss) excludes sales and marketing expenses, general and administrative expenses, the amortization of intangibles, restructuring and other charges, the impact of equity-based compensation, the charge for inventory and purchase commitments related to the discontinued 9200 product, and the goodwill and IPR&D impairment charges.

Segment Profit (Loss)

The decline in Optical segment profitability in 2012 from 2011 was driven primarily by the overall lower level of segment revenue. The decline in Optical segment profit in 2011 from 2010 was driven primarily by lower revenue from digital cross connect systems, which carry gross margins higher than the corporate average.

Increased loss in the Data segment in 2012 from 2011 was driven primarily by the overall lower level of segment revenue, which was partially offset by increased product gross margins. The decline in Data segment profit in 2011 from 2010 was driven primarily by lower revenue from our smart routers and higher research and development expenses.

The decline in Access segment profitability in the three-year period was driven primarily by the lower level of access system revenue.

The decline in Services segment profit in 2012 from 2011 was driven primarily by the overall lower level of segment revenue. The decline in Services segment profit in 2011 from 2010 was driven primarily by lower revenue from deployment services, partially offset by improved profitability from professional services.

Other Income

In millions	2012		2011			2010
Interest income, net	$	7.3	$	12.1		$	12.6
Other income (expense), net		0.8		(4.2	)		5.2
Total other income	$	8.1	$	7.9		$	17.8

Interest income, net, decreased over the three-year period due to lower investment balances and lower yields on investments in marketable securities. In 2012, Other income (expense), net increased due to gains on sales of marketable securities and a $3.0 million gain on the sale of a long-term equity investment, compared with losses on sales of marketable securities and a $1.0 million charge for a write-down of a long-term equity investment in 2011. Other income (expense), net decreased in 2011 as a result of losses on fixed income investments, compared with gains taken on fixed income investments during 2010. Other income (expense), net includes a gain on the sale of a long-term equity investment of $3.0 million in 2012, and charges to write down long-term equity investments of $1.0 million in 2011, and $3.8 million in 2010.

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Income Taxes

In millions	2012			2011			2010
Income tax (expense) benefit	$	(23.1	)	$	6.6		$	(35.9	)
Effective tax rate		(15.6	)%		3.4	%		18.8	%

Income tax expense increased in 2012, reflecting tax expense on income from foreign operations and no tax benefit on domestic losses and tax credits. While we were partially able to recognize tax benefits in 2011, we established a valuation allowance in 2011 for the remaining losses. We did not recognize tax benefits on domestic losses in 2012 as it is more likely than not that such deferred tax assets will not be realized.

Income tax benefit increased in 2011 due to losses from domestic operations and a benefit of $8.6 million from the reversal of accrued taxes due to audit settlements and the expirations of statutes of limitations, partially offset by tax expense of $25.7 million on income from foreign operations. The tax benefit on domestic operations was limited due to the establishment of a full valuation allowance against domestic deferred tax assets.

As a result of domestic losses in 2012 and the net cumulative loss generated in the current and prior two years, sufficient negative evidence exists for the Company to determine that a full valuation allowance be maintained against its domestic deferred tax assets. For a more detailed discussion of the valuation allowance maintained on our deferred tax assets, see Note 10, Income Taxes.

On January 2, 2013 the American Taxpayer Relief Act (ATRA) of 2012 was signed into law. Certain provisions of this Act were made retroactive to January 1, 2012, including the exclusion from U.S. federal taxable income of certain interest, dividends, and other income of foreign affiliates, as well as the U.S. research and development tax credit. Our tax provision for 2012 reflects the tax law that was in place as of December 28, 2012. We will record any tax effects of the ATRA in the first quarter of 2013. We expect such impact to be limited to adjustments to our domestic deferred tax assets and valuation allowance on the balance sheet, with minimal impact to tax expense.

Financial Condition, Liquidity & Capital Resources

Our principal source of liquidity remained cash, cash equivalents and marketable securities of $604.4 million as of December 28, 2012, which decreased by $372.2 million since year-end 2011. Of the total cash, cash equivalents and marketable securities, as of December 28, 2012, $455.1 million was held in subsidiaries outside the United States.

We currently intend to repatriate approximately $367 million of our cash held by non-U.S. subsidiaries during the first quarter of 2013. Except for withholding taxes of approximately $1 million, we expect net operating loss carryforwards and foreign tax credits to offset any remaining cash tax liability. We anticipate that future foreign earnings will be deemed to be permanently reinvested, although we could elect to repatriate funds held in one or more foreign jurisdictions. If applicable, withholding taxes could reduce the net amount repatriated, and we could be required to accrue and remit applicable U.S. income taxes to the extent a tax liability results after utilization of net operating loss carryforwards and available tax credits.

The decrease in cash, cash equivalents and marketable securities for 2012 is primarily the result of distributions of cash dividends, including the special dividend of $1 per share, and capital expenditures offset by cash generated from operations. In 2012, we generated $45.1 million of cash from operating activities, compared with cash used for operating activities of $49.1 million in 2011, and cash generated from operating activities of $288.8 million in 2010.

During 2012, we distributed a combined total of $396.9 million to our stockholders through quarterly cash dividends and a special dividend of $367.6 million. In 2012, we repurchased 36 thousand shares of common stock at a cost of $0.1 million.

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The Tellabs Board of Directors did not authorize a cash dividend for the first quarter of 2013. We provide no assurance as to a future declaration or payment of a cash dividend or do we provide future assurance of a repurchase of common stock.

We believe that our investments are highly liquid instruments. We may rebalance the portfolio from time to time, which may affect the duration, credit structure, liquidity and future income of investments.

Based on historical performance and current forecasts, we believe the company’s cash, cash equivalents and marketable securities will satisfy working capital needs, capital expenditures and other liquidity requirements related to existing operations for the next 12 months. Future available sources of working capital, including cash, cash equivalents, and marketable securities, cash generated from future operations, short-term or long-term financing, equity offerings or any combination of these sources, should allow us to meet our long-term liquidity needs. Current policy is to use cash, cash equivalents and marketable securities to fund business operations, to expand business, potentially through acquisitions, to repurchase common stock and to potentially pay a cash dividend.

Non-GAAP Financial Measures and Comparisons

In addition to reporting financial results in accordance with U.S. generally accepted accounting principles (GAAP), Tellabs, Inc. has provided non-GAAP financial measures as additional information for its operating results. We believe that comparing some non-GAAP financial measures provides important supplemental information to management and investors regarding financial and business trends relating to our financial results. Commonly compared non-GAAP financial data includes gross profit as a percentage of revenue, operating expenses, operating earnings, net earnings and net earnings per share. A complete reconciliation between non-GAAP financial measures and the GAAP financial measures, along with an explanation of why we believe non-GAAP measures to be of value to management and investors, is contained in the Reconciliation of Non-GAAP Adjustments provided following this discussion.

Non-GAAP gross profit margin in 2012 was 39.7%, compared with 39.8% in 2011. Non-GAAP operating expenses in 2012 were $421.9 million, compared with $546.8 million in 2011, driven primarily by lower research and development, sales and marketing, and general and administrative expenses related to stopping new development of mobile packet-core products. Non-GAAP operating loss in 2012 was $4.1 million, compared with an operating loss of $34.8 million in 2011.

Driven primarily by lower operating expenses and stable gross margins, non-GAAP net earnings were $0.6 million or breakeven earnings per share (basic and diluted) in 2012, compared with non-GAAP net loss of $17.6 million or $0.05 per share (basic and diluted) in 2011, despite the $233.1 million decline in overall annual revenue.

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TELLABS, INC.

RECONCILIATION OF NON-GAAP ADJUSTMENTS ⁽¹⁾

(Unaudited)

	Twelve Months Ended
In millions, except per-share data		12/28/12			12/30/11
Gross Profit Reconciliation (GAAP / non-GAAP)
GAAP gross profit	$	406.9		$	508.3
Inventory and purchase commitments adjustment (a)		8.1			—
Equity-based compensation – products (b)		1.1			1.6
Equity-based compensation – services (b)		1.7			2.1
Total adjustments related to gross profit		10.9			3.7
Non-GAAP gross profit	$	417.8		$	512.0
Non-GAAP gross profit percentage		39.7	%		39.8	%
Non-GAAP gross profit percentage – products		40.7	%		41.1	%
Non-GAAP gross profit percentage – services		35.2	%		33.7	%
Operating Expenses Reconciliation (GAAP / non-GAAP)
GAAP operating expenses	$	563.6		$	711.2
Equity-based compensation – research and development (b)		5.6			8.2
Equity-based compensation – sales and marketing (b)		3.0			4.3
Equity-based compensation – general and administrative (b)		8.7			8.7
Intangible asset amortization (c)		5.4			20.2
Restructuring and other charges (d), (e)		119.0			20.3
Goodwill and IPR&D impairment (f)		—			102.7
Total adjustments related to operating expenses		141.7			164.4
Non-GAAP operating expenses	$	421.9		$	546.8
Operating Loss Reconciliation (GAAP / non-GAAP)
GAAP operating loss	$	(156.7	)	$	(202.9	)
Total adjustments related to gross profit		10.9			3.7
Total adjustments related to operating expenses		141.7			164.4
Non-GAAP operating loss	$	(4.1	)	$	(34.8	)
Non-GAAP operating loss as a percentage of revenue		(0.4	)%		(2.7	)%
Net Loss Reconciliation (GAAP / non-GAAP)
GAAP net loss	$	(171.7	)	$	(188.4	)
Total adjustments related to gross profit		10.9			3.7
Total adjustments related to operating expenses		141.7			164.4
(Gains) write-downs of long-term equity investments (g)		(3.0	)		1.0
Income tax effect (h)		22.7			1.7
Non-GAAP net earnings (loss)	$	0.6		$	(17.6	)
Non-GAAP net earnings (loss) per share – basic	$	—		$	(0.05	)
Non-GAAP net earnings (loss) per share – diluted	$	—		$	(0.05	)

⁽¹⁾  Reconciliation of non-GAAP Adjustments

In addition to reporting financial results in accordance with U.S. generally accepted accounting principles (GAAP), Tellabs, Inc. has provided non-GAAP financial measures as additional information to evaluate our operating performance. These operating performance measures have not been prepared in accordance with GAAP and may be different from measures used by other companies. Whenever we use non-GAAP financial performance measures, we provide a reconciliation of non-GAAP financial performance measures to the most closely applicable GAAP financial performance measure. Management believes the non-GAAP financial performance measures are an important measure of operating performance and provides useful information to investors to better evaluate the operating performance of our business as it highlights trends in our business that may not otherwise be apparent when relying solely on GAAP measures and because it facilitates comparisons to historical results of operations. Management uses these non-GAAP financial performance measures as supplements to our GAAP results in order to provide a more complete understanding of the factors and trends affecting our business as well as for business planning and performance management. Management discloses this information publicly along with a reconciliation of the comparable GAAP amounts, to provide access to the detail and general nature of adjustments made to GAAP financial results. While some of these excluded items have been periodically reported in our statements of operations, including significant restructuring and other charges, their occurrence in future periods depends on future business and economic factors, among other evaluation criteria, and the occurrence of such events and factors may frequently be beyond the control of management.

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Footnotes to reconciliation of non-GAAP adjustments:

(a) We excluded $8.1 million from cost of revenue—products in 2012 for a reserve for inventory and purchase commitments related to the decision to discontinue the 9200 product. At the time of the decision we had not sold any 9200 product for commercial installation and we excluded this charge because we believe that it is not related directly to the underlying performance of our ongoing business operations and we excluded this measure when we review financial results and for business planning and performance management. Although this event is reflected in our GAAP financials, this transaction may limit the comparability of our fundamental, ongoing operations with prior and future periods.

(b) The adjustments to cost of revenue, research and development, sales and marketing, and general and administrative expenses reflect equity-based compensation expense. We exclude these measures when reviewing financial results and for business planning and performance management. We believe that the exclusion of equity-based compensation expense allows for more accurate comparisons of operating results to our peer companies. In addition, we believe this non-cash GAAP measure is not indicative of our fundamental operating performance.

(c) We exclude amortization of intangible assets resulting from acquisitions to evaluate our continuing operational performance. The amortization of purchased intangible assets associated with acquisitions results in recording expense in our GAAP financial statements that were already expensed by the acquired company before the acquisition and for which we have not expended cash. We believe this non-cash GAAP measure is not indicative of our core operating performance. Accordingly, we analyze the performance of operations without regard to such expenses.

(d) We exclude restructuring and other charges because we believe they occur outside of the ordinary course of and are not related directly to the underlying performance of our fundamental business operations. We exclude these measures when reviewing financial results and for business planning and performance management. Although these events are reflected in our GAAP financials, these transactions may limit the comparability of our fundamental operations with prior and future periods.

(e) In conjunction with the January 30, 2012 Restructuring Plan, we recorded $47.7 million of accelerated amortization for abandoned intangible assets in the first quarter of 2012 related to the mobile packet core technology. We believe this non-cash GAAP measure is not indicative of our core operating performance.

(f) We recorded a $82.7 million goodwill impairment charge in 2011, which related to the Broadband segment. In addition, we recorded a $20.0 million other-than-temporary impairment for in-process research and development intangible assets in 2011. We believe these non-cash GAAP measures are not indicative of our core operating performance.

(g) The $3.0 million adjustment to other income (expense), net in 2012 reflects a gain on the sale of a long-term equity investment. The $1.0 million adjustment to other income (expense), net in 2011 reflects losses on the write-down of long-term equity investments. We exclude write-downs and gains on sales of long-term equity investments because we believe that they are not related directly to the underlying performance of our working capital assets.

(h) We calculate a separate tax expense and effective tax rate for GAAP and for non-GAAP purposes. For non-GAAP purposes, we use a 32% effective tax rate which represents the projected, long-term effective tax rate on non-GAAP pretax income. Our non-GAAP tax rate assumes full use of loss and credit carryforwards without reduction for valuation allowances.

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Contractual Obligations

The following table sets forth an overview of contractual obligations, as of December 28, 2012, that will affect our liquidity and cash flows in future periods:

	Payments Due by Period
In millions	Total		Less than 1 Year		1-3 Years		3-5 Years		More than 5 Years
Operating lease obligations	$	40.4	$	12.6	$	17.9	$	8.4	$	1.5
Operating lease obligations related to restructuring activities, net		5.5		3.6		1.9		—		—
Purchase commitments to contract manufacturers and suppliers		143.5		143.5		—		—		—
Loan related to other marketable securities 1		195.1		195.1		—		—		—
Borrowing fees on loan related to other marketable securities 2		6.8		1.2		2.5		2.5		0.6
Total contractual obligations	$	391.3	$	356.0	$	22.3	$	10.9	$	2.1

¹ Our agreement with the lender of the stock has no defined date when we must repay the loan; however, the loan is callable at the discretion of the lender. Our investment in Cisco stock is maintained at a value equal to the market value of the loaned securities. See Note 5, Investments, to the consolidated financial statements included in Item 8 of this Form 10-K for a more complete description of this obligation.

² For purposes of contractual obligations disclosure, we used Cisco’s average share price of $18.65 for the quarter ended December 28, 2012, to determine the hypothetical value of the borrowing fees assuming the loans are settled in 2018.

We use several contract manufacturers and suppliers who provide manufacturing services for our products. During the normal course of business, we enter into agreements with certain contract manufacturers and suppliers that enable them to procure inventory based on criteria defined by us to reduce manufacturing lead times and ensure adequate component supply. Under these agreements, the maximum liability for purchase commitments as of December 28, 2012, was $143.5 million, of which $12.5 million for excess purchase commitments was recorded in Other accrued liabilities on the balance sheet.

The borrowing fees on the loan related to other marketable securities that are recorded in the financial statements each period are affected by Cisco’s average share price at the end of each quarter.

As of December 28, 2012, we had unrecognized tax positions of $14.1 million in long-term income tax liabilities. At this time, we are unable to make a reasonable estimate of the timing of payments in individual years beyond 12 months due to uncertainties in the timing of tax audit outcomes.

Off-Balance Sheet Arrangements

None.

Critical Accounting Estimates

The methods, estimates and judgments that we use in applying accounting policies can have a significant impact on the results we report in the consolidated financial statements. Some of these estimates require difficult and subjective judgments, often as a result of the need to estimate matters that are inherently uncertain. For the reasons discussed below, we consider critical accounting estimates to be revenue recognition, the allowance for excess and obsolete inventory and excess purchase commitments (collectively E&O), goodwill, the valuation of amortizable intangible assets, the estimate of the warranty liability, reserve requirements for lease obligations on vacated facilities, income taxes, valuation allowance for deferred tax assets and equity-based compensation.

We have discussed the development and selection of these critical accounting policies and estimates with the Audit and Ethics Committee of Tellabs’ Board of Directors.

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Revenue Recognition

Determining the proper revenue recognition in our financial statements requires us to make judgments about the application of the accounting rules based on the facts and circumstances of each customer arrangement.

When a customer arrangement involves multiple deliverables, we evaluate all deliverables to determine whether they represent separate units of accounting. This approach involves a determination about:

• whether the delivered item has value to the customer on a stand-alone basis; and

• whether delivery or performance of the undelivered item is considered probable and is substantially in our control where an arrangement contains a general right of return relative to the delivered item.

We account for the delivered item as a separate unit of accounting if we satisfy both points identified above.

Arrangement consideration is allocated to all deliverables based on the relative selling price. We determine selling price using one of three methods: vendor-specific objective evidence, third-party evidence or estimated selling price. We use vendor-specific objective evidence if available, third-party evidence if vendor-specific objective evidence is not available or estimated selling price if neither vendor-specific objective evidence nor third-party evidence is available. The factors mentioned above involve estimates and judgments that can impact the pattern and timing of revenue recognition.

The determination of whether software products bundled with tangible products where the software components and non-software components function together to deliver the product’s essential functionality can impact whether revenue is recognized under software revenue recognition guidance or under general revenue recognition guidance. This assessment could impact the amount and timing of revenue recognition.

Many of our contracts contain customer acceptance provisions. In cases involving sales of new products, for example, we defer revenue until we receive formal customer acceptance. In cases where we can demonstrate that the product or service has met all acceptance criteria prior to formal customer acceptance, or where we have sufficient historical evidence of customer acceptance, we consider acceptance to be perfunctory; and therefore, formal customer acceptance is not required. Judgment about whether acceptance is perfunctory can impact the timing of revenue for contracts containing acceptance provisions.

Excess & Obsolete Inventory and Excess Purchase Commitments

We determine inventory cost using the first-in, first-out method, and we value inventory at the lower of cost or market, with market determined by reference to current replacement cost or net realizable selling price. We determine the amount of inventory that is excess and obsolete (E&O) and purchase commitments in excess of requirements using estimates of future demand for individual components of raw materials and finished goods.

To determine E&O and liabilities related to purchase commitments, we compare piece parts and finished goods on hand and on order to forecasted product demand and usage requirements. We record a valuation allowance for inventory quantities on hand and excess purchase commitments on order in excess of two years’ expected usage. For inventory quantities that fall between one and two years’ demand, we use management’s judgment to determine the appropriate E&O amount. We do not record an allowance if the quantity is less than one year’s forecasted demand.

We believe the accounting estimate related to E&O is a critical accounting estimate because it requires us to make assumptions about future sales volumes and product mix, both of which can be highly uncertain. Changes in these estimates can have a material effect on our financial statements.

Goodwill

Goodwill impairment is reviewed annually and when impairment indicators exist by comparing the segment’s net carrying value to its fair value. If the segment’s fair value is greater than its net carrying value, then further impairment tests are not deemed necessary. If the segment’s fair value is less than its net carrying value, then further tests are performed to determine the segment’s implied fair value of goodwill. The implied fair value is then compared against the carrying value of goodwill to determine the amount of the goodwill impairment.

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The process of evaluating the potential impairment of goodwill is subjective because it requires the use of estimates and assumptions in determining a segment’s fair value. We estimate the fair value using the best information available to us, including discounted cash flow forecasts and market information. The discounted cash flow method requires us to use estimates and judgments about the future cash flows of the operating segments. Although we base cash flow forecasts on assumptions that are consistent with plans and estimates we use to manage the underlying operating segments, there is significant judgment in determining the cash flows attributable to these operating segments, including markets and market share, sales volumes and mix, research and development expenses, tax rates, capital spending, discount rate and working capital changes. Cash flow forecasts are based on segment operating plans for the early years and business projections in later years. The market approach is based on a comparison of the Company to comparable publicly traded firms in similar lines of business. The estimates and judgments used to determine comparable companies include such factors as size, growth, profitability, risk and return on investment.

We believe the accounting estimate related to the valuation of goodwill is a critical accounting estimate because it requires us to make assumptions that are highly uncertain about the future cash flows of our segments. Changes in these estimates can have a material impact on our financial statements.

As of December 28, 2012, the goodwill balance was $122.1 million, all in the Services segment. There was no impairment of the Services segment goodwill from our annual reviews in 2012, 2011, or 2010. For the annual impairment review in 2012, the excess of the fair value over the carrying value for the Services segment was over 85%.

Intangible Assets

Intangible assets consist of customer relationships, which arose from an acquisition of a business in 2004.

We evaluate the carrying value of intangible assets and other long-lived assets for impairment whenever indicators of impairment exist. We test finite-lived intangible assets for recoverability using pretax undiscounted cash flows. Although we base cash flow forecasts on assumptions that are consistent with plans and estimates we use to manage the underlying operating segments, there is significant judgment in determining the cash flows attributable to these operating segments, including markets and market share, sales volumes and mix, research and development expenses, capital spending and working capital changes. Cash flow forecasts are based on segment operating plans for the early years and business projections in later years. We compare the pretax undiscounted cash flows to the carrying value of the asset group. If the carrying value exceeds the sum of the undiscounted cash flows of the asset group, an impairment charge must be recognized in the financial statements.

We believe the accounting estimate related to the valuation of intangible assets is a critical accounting estimate because it requires us to make assumptions about future sales prices and volumes for products that involve new technologies and applications where customer acceptance of new products or timely introduction of new technologies into their networks are uncertain. The recognition of an impairment could be material to our financial statements.

Warranty Costs

We provide warranties for all of our products, with terms and conditions that vary depending on the product sold. We provide a basic limited warranty for periods that range from 90 days to six years. We record warranty expense in cost of revenue on the Consolidated Statements of Operations. We estimate warranty liability by applying historical warranty return rates and costs per claim to the number of units shipped that are still within their warranty period. In addition, when we judge that a particular warranty claim will involve costs that are out of the ordinary, we separately estimate the costs for that claim and record the amount as an additional warranty expense for the period in which we determine we have a liability.

We believe that the accounting estimate related to warranty costs is a critical accounting estimate because it requires us to make assumptions about matters that are highly uncertain, including: future rates of product failure; repair costs, including availability of materials; shipping and handling; and de-installation and re-

39

installation costs at customers’ sites, among others. Consequently, the changes in warranty reserves could be material to our financial statements.

Restructuring Reserves – Leases

Restructuring reserves consist of amounts we owe on leases for facilities we vacated, reduced by an estimate of sublease rental income. We determined the amount of the reserve for each facility by estimating the amount of time it will be vacant before it is sublet and the terms of the sublease agreement compared with our obligation, then reducing the reserve by an estimate of potential sublease income. We examine real estate market conditions in each location where we have a vacated facility.

We believe the accounting estimate of restructuring lease obligations is a critical accounting estimate because it requires us to make assumptions about real estate rental markets and conditions that are highly uncertain, and changes in our estimates could have a material impact on our financial statements.

Income Taxes

We conduct business and file income tax returns in numerous tax jurisdictions around the world. This requires us to interpret tax laws that are often vague and uncertain, and to make judgments about the application of those laws when we prepare tax returns. When we calculate income tax expense and the related tax liabilities and assets for the consolidated financial statements, we use estimates of the amount of income, deductions and credits that we believe are allowable under local tax laws and that should be allowed by tax authorities if the tax returns are audited. However, tax authorities may disagree on the amounts of income, deductions and credits that are allowed to be included in those tax returns. This could result in paying additional taxes or receiving a refund of previously paid taxes.

Because we are a large multi-national corporation, the United States Internal Revenue Service (IRS) generally audits each of our federal income tax returns. We are currently under audit by the State of Illinois for the 2007 and 2008 periods; in India for the 2009 period; and in the Philippines for the 2010 period. We are not currently under audit in the United States or in any of our other major jurisdictions for tax periods through 2012. During 2013 we expect the IRS to begin an audit of our 2010 and 2011 tax periods. Although we have recorded tax reserves for potential adjustments to tax liabilities for prior years, we cannot provide assurance that a material adjustment to our financial statements, either positive or negative, will not result when audits are concluded. We adjust tax reserves in light of changing facts and circumstances, such as the closing of a tax audit or refinement of an estimate. To the extent that the final tax outcome of these matters is different than the amounts recorded, such differences will impact income tax expense in the period in which such determination is made.

Valuation Allowance for Deferred Tax Assets

Deferred tax assets arise when we recognize charges or expenses in our financial statements that will not be allowed as income tax deductions until future periods. The term deferred tax asset also includes unused tax net operating losses and tax credits that we are allowed to carry forward to future years. Accounting rules permit us to carry deferred tax assets on the balance sheet at full value as long as it is “more likely than not” the deductions, losses, or credits will be used in the future. A valuation allowance must be recorded against a deferred tax asset if this test cannot be met. The accounting rules state that a company with a recent history of losses would have a difficult, perhaps impossible, time supporting a position that utilization of its deferred tax assets was more likely than not to occur.

Significant judgment is required in determining any valuation allowance against deferred tax assets. In assessing the need for a valuation allowance, we consider all available evidence, including past operating results, estimates of future taxable income and the feasibility of tax planning strategies. We currently believe that the cumulative loss incurred by the Company in the 2010 through 2012 period represents sufficient negative evidence to determine that the establishment of a valuation allowance against domestic deferred tax assets is appropriate. Until an appropriate level of profitability is attained, we expect to maintain a valuation allowance on net deferred tax assets related to future U.S. and certain non-U.S. tax benefits. In the event that we change our determination as to the amount of deferred tax assets that can be realized, we will adjust our valuation allowance with a corresponding impact to the provision for income taxes in the period in which such determination is made.

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Equity-Based Compensation

We account for equity-based compensation in accordance with the Financial Accounting Standards Board (FASB) authoritative guidance related to accounting for share-based payments. Under the fair value recognition provisions of this guidance, we measure equity-based compensation cost, at the grant date, based on the fair value of the award, which is recognized as expense over the vesting period. Determining the fair value of equity-based awards at the grant date requires several assumptions, and a change in these assumptions could materially impact equity-based compensation expense and results of operations. These assumptions include our stock’s expected volatility, the risk-free interest rate, expected option term and expected dividend yield. In addition, we estimate the amount of equity-based awards that are expected to be forfeited.

Strategy and Outlook

Over the past few years, wireless service providers, under competitive pressure, have aggressively invested in network infrastructure to deliver 3G and 4G services. As consumers continue to embrace smartphones and tablets for high-bandwidth mobile Internet applications, wireless carriers need to expand the capacity of their networks to keep up with increasing traffic. As the average revenue per mobile user remains relatively flat, the need to invest in additional capacity has constrained the profitability of wireless carriers and limited their willingness to make future investment in products from Tellabs and its competitors.

In the wireline sector, service providers have transformed their access networks with fiber-optic technology to deliver a bundle of voice, data and video services to their residential customers. On the enterprise side, wireline providers also need to invest in next-generation technology to deliver voice, data and video services to their corporate customers. These programs are capital-intensive, and it is unclear if wireline carriers will achieve sufficient return on investment within an acceptable time-frame, thus limiting carriers’ willingness to invest in new technology from Tellabs and its competitors.

To achieve the advantages of scale needed to sustain such major network build-outs, many carriers have consolidated or begun to share network assets. Customer consolidation and shared networks have reduced overall capital spending. In addition, large consolidated carriers have gained increased pricing power over equipment suppliers such as Tellabs. While some equipment suppliers have also consolidated to achieve the scale advantages needed to better address the larger customer base, the overall market is characterized as one in which a relatively small number of customers exerts significant pricing power over a larger number of suppliers. Heightened competition by suppliers has resulted in increased pricing pressure for suppliers on a global basis.

In recent years, Tellabs has acquired technology and invested in research and development for new products to drive profitable, sustainable revenue growth. Despite these efforts, total revenue has not grown since 2010, resulting in losses in each of the last two years. Since July 2011, Tellabs has restructured its operations four times to bring expenses in line with expected revenue and discontinued development of the Tellabs 9100 and 9200 products. Return-on-investment analysis, customer response and overall market conditions indicated that Tellabs would not be able to achieve sufficient returns from the Tellabs 9100 and 9200 products, given the required investment, within an acceptable time-frame.

In 2013, Tellabs will continue to streamline its costs and operating expenses by reducing research and development expenses for Data segment products and modestly increasing spending to enhance products in the Optical and Access segments. At the same time, Tellabs will begin investment in Software-Defined Networking (SDN) and Self-Organizing Networks (SON) enhancements to its existing hardware platforms and network management solutions.

Within the Data segment, Tellabs will continue to evolve and extend the IP and Ethernet capabilities of the Tellabs 8600 and 8800 Smart Routers, while also pursuing enhancements to speed small cell and macro cell deployment. At the same time, stopping development of the Tellabs 9200 product will reduce overall research and development expenses for the segment.

In the Optical segment, Tellabs will modestly increase research and development in the Tellabs 7100 Optical Transport System (OTS) and 7300 Metro Ethernet Switching Series. These enhancements will enable customers

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to reduce transmission costs, improve the ability of mesh networks to recover from failures and speed up the time needed to deploy new services, while developing a path toward future 100G and 400G services on the 7100 OTS.

In the Access segment, Tellabs will modestly increase research and development in the Tellabs 1100 Multiservice Access Platform and ship the new Tellabs Mini-ONT. These enhancements will increase functionality for delivering residential triple-play services, providing small cell mobile backhaul, and enabling optical LANs for enterprises.

In the Services segment, Tellabs will focus on expanding the customers for its Insight Analytics Services for mobile network analytics. Tellabs will continue emphasis on improving overall customer experience while growing overall Services revenue and profitability.

Tellabs’ goal is to target near-term nominal profitability while managing research and development to enhance Tellabs solutions for future revenue growth. The goal is for operating expenses to decrease and quarterly revenue to improve through the course of 2013.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

During the normal course of business, we invest a portion of our cash and cash equivalents in marketable securities. These investments are sensitive to interest rate movements and their fair value will decline as interest rates rise and increase as interest rates decline. For a discussion of our investments in marketable securities for the fiscal years ended December 28, 2012, and December 30, 2011, see Note 5, Investments, to the consolidated financial statements included in Item 8 of this Form 10-K and is incorporated herein by reference.

Foreign Currency Exchange Risk

We conduct business on a global basis in U.S. and foreign currencies subjecting us to risks associated with fluctuating foreign exchange rates. To mitigate these risks, we use derivative foreign exchange contracts to address nonfunctional exposures that are expected to be settled in one year or less. The derivative foreign exchange contracts consist of foreign currency forward and option contracts.

Derivative financial contracts involve elements of market and credit risk. The market risk that results from these contracts relates to changes in foreign currency exchange rates, which generally are offset by changes in the value of the underlying assets or liabilities being held. Credit risk relates to the risk of nonperformance by a counterparty to one of our derivative contracts. We do not believe there is a significant credit risk associated with our hedging activities. We monitor the counterparties’ credit ratings and other market data to minimize credit risk. In addition, we also limit the aggregate contract amount entered into with any one financial institution to mitigate credit risk.

Balance Sheet Hedges (Non-designated Hedges)

Short-term monetary assets and liabilities denominated in currencies other than the functional currency of the Tellabs entity entering into the transaction are remeasured through income as foreign currency rates fluctuate. Changes in the value of derivative contracts intended to offset these fluctuations are also recorded in income. The gain or loss from changes in the fair value of the derivative contracts are generally offset by gains or losses of the underlying transactions being hedged. These derivative contracts are not designated as hedges. At December 28, 2012, we held non-designated foreign currency forward contracts in 10 currencies, with a gross notional equivalent of $125.5 million. The maturities of the foreign currency forward contracts held at year-end range from one to six months.

42

Our net foreign currency exposure is diversified among a broad number of currencies. The notional amounts reflected in the following table represent the U.S. dollar values of the agreed-upon amounts that will be delivered to a third party on the agreed-upon date:

	December 28, 2012
In millions	Notional Amount		Fair Value
Forward Contracts
Purchased	$	38.4	$	(0.1	)
Sold		87.1		—
Total	$	125.5	$	(0.1	)

43

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Consolidated Financial Statements

	Page
Management’s Report on Internal Control over Financial Reporting		45
Report of Independent Registered Public Accounting Firm		46
Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting		47
Consolidated Statements of Operations		48
Consolidated Statements of Comprehensive (Loss) Income		49
Consolidated Balance Sheets		50
Consolidated Statements of Stockholders’ Equity		51
Consolidated Statements of Cash Flows		52
Notes to Consolidated Financial Statements		53
Note 1: Summary of Significant Accounting Policies		53
Note 2: Restructuring and Other Charges		56
Note 3: Goodwill and Intangible Assets		59
Note 4: Fair Value Measurements		60
Note 5: Investments		63
Note 6: Derivative Financial Instruments		65
Note 7: Product Warranties		66
Note 8: Equity-Based Compensation		67
Note 9: Employee Benefit and Retirement Plans		70
Note 10: Income Taxes		73
Note 11: Accumulated Other Comprehensive Income		76
Note 12: Segment Information		76
Note 13: Operating Lease Commitments		78
Note 14: Contingencies		78
Note 15: Stock Repurchase Programs		80
Note 16: Net (Loss) Earnings Per Share		81
Note 17: Quarterly Financial Data (Unaudited)		82
Note 18: Subsequent Event		82

44

Management’s Report on Internal Control over Financial Reporting

The management of Tellabs, Inc., and subsidiaries (the “Company”) is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rules 13a-15(f) of the Securities Exchange Act of 1934, as amended. Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the Company’s internal control over financial reporting as of December 28, 2012, as required by Rule 13a-15(c) of the Securities Exchange Act of 1934, as amended. In making this assessment, we used the criteria set forth in the Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under this framework, our management concluded that internal control over financial reporting was effective as of December 28, 2012. Our internal control over financial reporting as of December 28, 2012 has been audited by Ernst & Young, LLP, an independent registered public accounting firm, as stated in their report, which is included herein.

Daniel P. Kelly

President and Chief Executive Officer

Andrew B. Szafran

Executive Vice President and Chief Financial Officer

February 22, 2013

45

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Tellabs, Inc.

We have audited the accompanying consolidated balance sheets of Tellabs, Inc. and subsidiaries (the “Company”) as of December 28, 2012, and December 30, 2011, and the related consolidated statements of operations and comprehensive income (loss), stockholders’ equity, and cash flows for each of the three years in the period ended December 28, 2012. Our audits also included the financial statement schedule listed in the Index of Item 15(a). These consolidated financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of the Company at December 28, 2012, and December 30, 2011, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 28, 2012, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’s internal control over financial reporting as of December 28, 2012, based on criteria established in Internal Control -Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 22, 2013, expressed an unqualified opinion thereon.

Chicago, Illinois

February 22, 2013

46

Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting

To the Board of Directors and Stockholders of Tellabs, Inc.

We have audited Tellabs, Inc. and subsidiaries’ (the “Company”) internal control over financial reporting as of December 28, 2012, based on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). The Company’s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 28, 2012, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of the Company as of December 28, 2012, and December 30, 2011, and the related consolidated statements of operations and comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended December 28, 2012, and our report dated February 22, 2013, expressed an unqualified opinion thereon.

Chicago, Illinois

February 22, 2013

47

Consolidated Statements of Operations

In millions, except per-share data	Year Ended 12/28/12			Year Ended 12/30/11			Year Ended 12/31/10
Revenue
Products	$	854.0		$	1,062.4		$	1,400.0
Services		198.6			223.3			242.3
Total revenue		1,052.6			1,285.7			1,642.3
Cost of Revenue
Products		515.4			627.3			689.3
Services		130.3			150.1			163.4
Total cost of revenue		645.7			777.4			852.7
Gross Profit		406.9			508.3			789.6
Operating Expenses
Research and development		238.7			324.1			299.7
Sales and marketing		126.4			163.0			179.3
General and administrative		74.1			80.9			100.4
Intangible asset amortization		5.4			20.2			27.0
Restructuring and other charges		119.0			20.3			9.5
Goodwill and IPR&D impairment		—			102.7			—
Total operating expenses		563.6			711.2			615.9
Operating (Loss) Earnings		(156.7	)		(202.9	)		173.7
Other Income
Interest income, net		7.3			12.1			12.6
Other income (expense), net		0.8			(4.2	)		5.2
Total other income		8.1			7.9			17.8
(Loss) Earnings Before Income Tax		(148.6	)		(195.0	)		191.5
Income tax (expense) benefit		(23.1	)		6.6			(35.9	)
Net (Loss) Earnings	$	(171.7	)	$	(188.4	)	$	155.6
Weighted Average Shares Outstanding
Basic		367.0			364.5			378.1
Diluted		367.0			364.5			382.7
Net (Loss) Earnings Per Share
Basic	$	(0.47	)	$	(0.52	)	$	0.41
Diluted	$	(0.47	)	$	(0.52	)	$	0.41

The accompanying notes are an integral part of these statements.

48

Consolidated Statements of Comprehensive (Loss) Income

In millions	Year Ended 12/28/12			Year Ended 12/30/11			Year Ended 12/31/10
Net (Loss) Earnings	$	(171.7	)	$	(188.4	)	$	155.6
Reclassification adjustment for net gain included in net (loss) earnings, net of tax of $0.5, $0.1, $1.8		(1.1	)		(0.6	)		(2.4	)
Unrealized net gain (loss) on available-for-sale securities, net of tax of $(0.6), $(0.5), $0.2		1.6			2.0			(0.4	)
Unrealized net (loss) gain on net investment hedges, net of tax of $0.4, $(0.7), $(3.7)		(2.5	)		1.9			6.4
Foreign currency translation adjustment, net of tax of $(2.9), $0.0, $0.0		11.3			(20.5	)		(35.4	)
Unrecognized prior service cost, net of tax of $0.0, $0.0, $0.0		0.1			0.1			0.1
Unrecognized net (loss) gain on retiree medical plan, net of tax of $0.1, $0.8, $(0.2)		(0.2	)		(1.7	)		0.5
Comprehensive (Loss) Income	$	(162.5	)	$	(207.2	)	$	124.4

The accompanying notes are an integral part of these statements.

49

Consolidated Balance Sheets

In millions, except share data	12/28/12			12/30/11
ASSETS
Current Assets
Cash and cash equivalents	$	223.7		$	132.7
Investments in marketable securities		380.7			843.9
Total cash, cash equivalents and marketable securities		604.4			976.6
Other marketable securities		195.1			190.9
Accounts receivable, net of allowances of $1.3 and $1.3		246.8			317.6
Inventories
Raw materials		30.2			33.7
Finished goods		70.8			110.3
Total Inventories		101.0			144.0
Income taxes		7.3			27.9
Miscellaneous receivables and other current assets		35.1			39.8
Total Current Assets		1,189.7			1,696.8
Property, Plant and Equipment
Land		20.1			20.0
Buildings and improvements		193.5			197.4
Equipment		406.4			446.9
Total property, plant & equipment		620.0			664.3
Accumulated depreciation		(389.6	)		(390.8	)
Property, plant and equipment, net		230.4			273.5
Goodwill		122.1			122.0
Intangible Assets, Net of Amortization		4.4			57.1
Other Assets		91.5			98.6
Total Assets	$	1,638.1		$	2,248.0
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities
Accounts payable	$	57.4		$	97.1
Accrued compensation		37.7			46.3
Restructuring and other charges		19.1			13.0
Income taxes		61.5			63.5
Loan related to other marketable securities		195.1			190.9
Deferred revenue		20.3			40.8
Other accrued liabilites		78.5			78.4
Total Current Liabilities		469.6			530.0
Long-Term Restructuring Liabilities		2.8			4.7
Income Taxes		21.9			21.2
Other Long-Term Liabilities		42.5			47.4
Stockholders’ Equity
Preferred stock: authorized 5,000,000 shares of $0.01 par value; no shares issued and outstanding		—			—
Common stock: authorized 1,000,000,000 shares of $0.01 par value; 508,846,484 and 505,238,503 shares issued		5.1			5.1
Additional paid-in capital		1,592.2			1,572.4
Treasury stock, at cost: 141,284,352 and 140,250,476 shares		(1,231.0	)		(1,227.2	)
Retained earnings		636.0			1,204.6
Accumulated other comprehensive income		99.0			89.8
Total Stockholders’ Equity		1,101.3			1,644.7
Total Liabilities and Stockholders’ Equity	$	1,638.1		$	2,248.0

The accompanying notes are an integral part of these statements.

50

Consolidated Statements of Stockholders’ Equity

In millions	Shares			Common Stock		Additional Paid-In Capital			Treasury Stock			Retained Earnings			Accumulated Other Comprehensive Income			Total Stockholders’ Equity
Balance, January 1, 2010		384.3		$	5.0	$	1,511.2		$	(1,037.9	)	$	1,296.8		$	139.8		$	1,914.9
Net earnings		—			—		—			—			155.6			—			155.6
Other comprehensive loss		—			—		—			—						(31.2	)		(31.2	)
Stock issued for employee stock programs		4.0			—		8.0			—			—			—			8.0
Equity-based compensation expense		—			—		26.8			—			—			—			26.8
Tax effect from equity-based compensation expense		—			—		1.9			—			—			—			1.9
Purchase of treasury stock		(25.8	)		—		—			(184.2	)		—			—			(184.2	)
Cash dividends paid		—			—		—			—			(30.3	)		—			(30.3	)
Balance, December 31, 2010		362.5		$	5.0	$	1,547.9		$	(1,222.1	)	$	1,422.1		$	108.6		$	1,861.5
Net loss		—			—		—			—			(188.4	)		—			(188.4	)
Other comprehensive loss		—			—		—			—			—			(18.8	)		(18.8	)
Stock issued for employee stock programs		3.5			0.1		0.5			—			—			—			0.6
Equity-based compensation expense		—			—		24.9			—			—			—			24.9
Tax effect from equity-based compensation expense		—			—		(0.9	)		—			—			—			(0.9	)
Purchase of treasury stock		(1.0	)		—		—			(5.1	)		—			—			(5.1	)
Cash dividends paid		—			—		—			—			(29.1	)		—			(29.1	)
Balance, December 30, 2011		365.0		$	5.1	$	1,572.4		$	(1,227.2	)	$	1,204.6		$	89.8		$	1,644.7
Net loss		—			—		—			—			(171.7	)		—			(171.7	)
Other comprehensive income		—			—		—			—			—			9.2			9.2
Stock issued for employee stock programs		3.6			—		—			—			—			—			—
Equity-based compensation expense		—			—		19.8			—			—			—			19.8
Purchase of treasury stock		(1.0	)		—		—			(3.8	)					—			(3.8	)
Cash dividends paid		—			—		—			—			(396.9	)		—			(396.9	)
Balance, December 28, 2012		367.6		$	5.1	$	1,592.2		$	(1,231.0	)	$	636.0		$	99.0		$	1,101.3

The accompanying notes are an integral part of these statements.

51

Consolidated Statements of Cash Flows

In millions	Year Ended 12/28/12			Year Ended 12/30/11			Year Ended 12/31/10
Operating Activities
Net (loss) earnings	$	(171.7	)	$	(188.4	)	$	155.6
Adjustments to reconcile net (loss) earnings to net cash provided by (used for) operating activities:
Depreciation and amortization		50.0			76.2			77.3
Loss on disposal of property, plant and equipment		1.5			0.7			0.3
Equity-based compensation		19.8			24.6			27.0
Deferred income taxes		5.5			(0.8	)		18.1
Restructuring and other charges		119.0			20.3			9.5
Net gain on investments in marketable securities		(3.1	)		—			(12.2	)
Goodwill and IPR&D impairment		—			102.7			—
Other-than-temporary impairment charges on investments		—			2.2			3.8
Excess tax benefits from equity-based compensation		—			(0.2	)		(1.6	)
Net changes in assets and liabilities:
Accounts receivable		72.9			15.9			(17.9	)
Inventories		41.6			16.9			(35.5	)
Miscellaneous receivables and other current assets		19.6			(7.6	)		10.6
Other assets		4.8			(4.6	)		(4.1	)
Accounts payable		(40.5	)		(23.1	)		52.7
Restructuring and other charges		(36.3	)		(11.7	)		(13.0	)
Deferred revenue		(20.2	)		(2.1	)		11.9
Other accrued liabilities		(9.9	)		(59.6	)		25.6
Income taxes		(3.7	)		(7.4	)		(16.8	)
Other long-term liabilities		(4.2	)		(3.1	)		(2.5	)
Net Cash Provided by (Used for) Operating Activities		45.1			(49.1	)		288.8
Investing Activities
Capital expenditures		(31.4	)		(65.2	)		(55.6	)
Proceeds on disposals of property, plant and equipment		—			0.3			0.1
Payments for purchases of investments		(475.6	)		(811.5	)		(2,217.7	)
Proceeds from sales and maturities of investments		950.0			888.2			2,245.1
Net Cash Provided by (Used for) Investing Activities		443.0			11.8			(28.1	)
Financing Activities
Proceeds from short-term borrowings		—			1.3			—
Payments of short-term borrowings		—			(1.3	)		—
Proceeds from issuance of common stock under stock plans		0.1			0.6			8.0
Repurchase of common stock		(3.8	)		(5.1	)		(184.2	)
Excess tax benefits from equity-based compensation		—			0.2			1.6
Dividends paid		(396.9	)		(29.1	)		(30.3	)
Net Cash Used for Financing Activities		(400.6	)		(33.4	)		(204.9	)
Effect of Exchange Rate Changes on Cash		3.5			(5.4	)		(1.0	)
Net Increase (Decrease) in Cash and Cash Equivalents		91.0			(76.1	)		54.8
Cash and Cash Equivalents—Beginning of Year		132.7			208.8			154.0
Cash and Cash Equivalents—End of Year	$	223.7		$	132.7		$	208.8
Other Information
Interest paid	$	1.2		$	1.3		$	1.7
Income taxes paid	$	4.3		$	6.1		$	23.3

The accompanying notes are an integral part of these statements.

52

Notes to Consolidated Financial Statements

In millions, except per-share data

1. Summary of Significant Accounting Policies

Nature of Business

We design, develop and support telecommunications networking products. We generate revenue principally through the sale of these products to communications service providers worldwide as both stand-alone network elements and as elements of integrated solutions. We also generate revenue by providing services to our customers.

Principles of Consolidation

Our consolidated financial statements include the accounts of Tellabs and its subsidiaries. We eliminate all intercompany accounts and transactions.

Use of Estimates

The preparation of the financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Cash Equivalents

We consider all highly liquid debt instruments purchased with original maturities of three months or less to be cash equivalents.

Investments in marketable securities

We account for investments in marketable securities at fair value, with the unrealized gain or loss, less deferred income taxes, included in Other Comprehensive (loss) income and shown as a separate component of stockholders’ equity. We base realized gains and losses on specific identification of the security sold. We review investments held with unrealized losses to determine if the loss is other-than-temporary. We evaluate near-term prospects of the security in relation to the severity and duration of the unrealized loss. We also assess our intent to sell the security, whether it is more likely than not that the security will be required to be sold before recovery, or the security is not expected to recover its entire amortized cost basis.

Fair Value of Financial Instruments

Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash and cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly. See discussion in Notes 5 and 6 regarding investments and derivatives, respectively.

Accounts Receivable Allowances

We base the reserve for allowances on an assessment of aged receivables and the collectability of customers’ accounts. We regularly review the allowance by considering factors such as customer financial strength, the age of accounts receivable balances, current economic conditions that may affect a customer’s ability to pay and historical experience. As specific balances are determined to be ultimately uncollectible, they are removed from accounts receivable.

Inventories and Suppliers

We determine inventory cost using the first-in, first-out method. We value inventory at the lower of cost or market, with market determined at the lower of current replacement cost or net realizable selling price. We determine the amount of inventory that is excess and obsolete and purchase commitments in excess of requirements using estimates of future demand for individual components of raw materials and finished goods.

We outsource the manufacturing of products to third-party suppliers. Although a limited number of suppliers are used to manufacture our products, we believe other suppliers could provide similar products on comparable

53

terms. An inability of a supplier to provide product could cause a near-term reduction of revenue, which would affect operating results adversely.

Property, Plant and Equipment

We record property, plant and equipment at cost or fair value if acquired in a business combination, less accumulated depreciation and amortization. We compute depreciation using the straight-line method. Buildings are depreciated over 25 to 40 years; building improvements over 7 years; leasehold improvements over the lesser of the life of the lease or the useful life of the asset, currently 3 to 10 years; and equipment over 3 to 10 years. We evaluate property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be fully recoverable.

Equity-Based Compensation

We recognize compensation expense for employee services received in exchange for awards of equity instruments based upon the grant date fair value of those awards over the requisite service period for the respective award.

Income Taxes

Income tax expense is based on pretax financial income and the tax rates applicable to that income in the various jurisdictions in which we operate. Deferred tax liabilities and assets are recognized for the expected future tax consequences of events that have been reflected in the consolidated financial statements. Deferred tax liabilities and assets are determined based on the differences between the book and tax bases of particular assets and liabilities as well as tax credit and operating loss carry forwards using tax rates in effect for the years in which the differences are expected to reverse. A valuation allowance is provided to offset deferred tax assets if, based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Significant judgment is required in determining and evaluating our tax positions. We establish reserves when it is more likely than not that we will not realize the full benefit of such positions. We adjust these reserves in light of changing facts and circumstances.

Goodwill

Goodwill impairment is reviewed annually and when impairment indicators exist. Goodwill impairment reviews are conducted in two steps, the first of which is by comparing the segment’s net carrying value to its estimated fair value. The process of evaluating the potential impairment of goodwill is subjective because it requires the use of estimates and assumptions. We calculate the fair value of the segment using the discounted cash flow method and the market approach of valuation. The discounted cash flow method requires us to use estimates and judgments about the amounts and timing of future cash flows of the segment. Although we base cash flow forecasts on assumptions that are consistent with plans and estimates we use to manage the underlying operating segments, there is significant judgment in determining the cash flows attributable to these operating segments, including markets and market share, sales volumes and mix, research and development expenses, tax rates, capital spending, discount rate and working capital changes. The market approach is based on a comparison of the Company to comparable publicly traded firms in similar lines of business. The estimates and judgments used to determine comparable companies include such factors as size, growth, profitability, risk and return on investment.

Intangible Assets

Intangible assets are made up of customer relationships from an acquisition. These assets are amortized over their estimated useful lives and reviewed for impairment when indicators of impairment exist, such as loss of customer relationships, customer non-acceptance of products and underlying technology, and reduced product margins indicating declining operating performance or cash flows. The estimated useful lives of these assets are evaluated to determine if a change in an estimate is required. The remaining carrying value of the asset is amortized prospectively over the remaining adjusted useful life of the asset. The review for potential impairment and change in estimated useful lives requires us to use estimates and judgments of future cash flows, consistent with plans and estimates we use to manage related product cash flows.

Revenue Recognition

Determining the proper revenue recognition in our financial statements requires us to make judgments about the application of the accounting rules based on the facts and circumstances of each customer arrangement.

54

We recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price or fee is fixed or determinable, and collectability is reasonably assured.

Contracts and customer purchase orders are generally used to determine the existence of an arrangement. Shipping terms and related documents are used to verify delivery or performance.

The Company assesses whether the sales price is fixed or determinable based on payment terms and whether the sales price is subject to refund or adjustment. If the price is not fixed or determinable, revenue is recognized as payments become due from the customer.

Collectability is assessed based on the creditworthiness of the customer as determined by credit checks and the customer’s payment history to the Company. If collectability is not considered probable, revenue is not recognized until the payment is made.

The majority of revenue comes from product sales. We generally recognize revenue either upon shipment or upon delivery to the customer, depending on the contractual delivery terms.

Some customer agreements contain acceptance clauses that grant the customer the right to return or exchange products that do not conform to specifications. If we do not have sufficient historical evidence of customer acceptance, we recognize revenue when we receive written evidence of customer acceptance or the acceptance provisions lapse. When we have sufficient historical evidence that products meet the specifications, we recognize revenue upon shipment or delivery provided title and risk of loss have transferred at that time.

Some customer agreements grant the right to return or exchange product. We accrue for returns based on historical evidence of rates of return. We recognize revenue, net of potential returns, upon shipment or upon delivery of the product to the customer provided title and risk of loss have transferred at that time.

Some customer arrangements are in the form of distribution agreements, with contractual rights of return, promotional rebates, and other incentives and credits allowances. We recognize revenue net of estimated returns and rebates, which are calculated based on contractual provisions and historical evidence of returns activity.

We also recognize revenue from deployment services, support agreements, training and professional services. Deployment services revenue results from installation of products at customer sites. Installation services, which generally occur over a short time period, are not services required for the functionality of products, as customers do not have to purchase installation services from us, and may install products themselves, or hire third parties to perform the installation services. We recognize revenue for deployment services upon completion. We recognize revenue from support agreements ratably over the service period. We recognize training and professional services revenue upon completion.

Many customer arrangements include the right to invoice the customer for costs of shipping product to the customer’s location. In these cases, we record the amount included on the customer’s invoice for shipping costs as revenue. The cost of shipping products to customers is recorded as cost of revenue.

We record revenue net of any sales-related taxes that are imposed on a sale to our customers regardless of whether or not we bill the customer for such tax. We believe this approach results in financial statements that are more easily understood by investors.

Accounting for multiple element arrangements

When a sales arrangement contains multiple deliverables, such as product sales that include services to be performed after delivery of the product, or where we sell multiple products to a customer, we account for a deliverable (or a group of deliverables) separately if (1) the delivered item(s) has stand-alone value to the customer, and (2) if we have given the customer a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) or service(s) is probable and substantially in our control.

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Arrangement consideration is allocated to all deliverables based on the relative selling price using one of three methods: vendor–specific objective evidence, third-party evidence or estimated selling price. We use vendor-specific objective evidence if available, third-party evidence if vendor-specific objective evidence is not available or estimated selling price if neither vendor-specific objective evidence or third-party evidence is available.

Revenue recognition for elements delivered will be limited to the amount that is not contingent on the future delivery of products and/or services, future performance obligations or subject to customer-specified return or refund privileges.

We determine vendor-specific objective evidence of an item based on our selling price for a deliverable when sold on a stand-alone basis. Third-party evidence is determined based on a vendor’s selling price for a comparable product or service on a stand-alone basis, if available. The best estimate of selling price is established based on internal factors including pricing practices, market conditions and product lifecycles.

If we determine that the software products bundled with tangible products function together to deliver the product’s essential functionality, we exclude them from the scope of software revenue recognition guidance.

Legal Costs

We expense legal costs associated with litigation defense as incurred.

Net Earnings per Share

We base net earnings per share on the weighted average number of issued and outstanding common shares (basic) and the weighted average issued and outstanding common shares adjusted for assumed exercises of dilutive stock options, unvested restricted stock and unvested performance stock units (diluted). We base net earnings per share in periods of a net loss solely on basic weighted average number of common shares outstanding.

Foreign Currency Translation

We generally measure the financial statements of foreign subsidiaries using the local currency as the functional currency. In such cases, we translate assets and liabilities at exchange rates in effect at the balance sheet date, and we translate revenue and expenses at weighted average exchange rates during the year. We record the gain or loss from translating a subsidiary’s stockholders’ equity into U.S. dollars as foreign currency translation adjustments in Accumulated other comprehensive income.

Foreign Currency Transactions

We recognize foreign currency transaction gains and losses resulting from changes in exchange rates due to the settlement of monetary assets and liabilities in a currency other than the subsidiary’s functional currency in Other income (expense), net.

2. Restructuring and Other Charges

On October 24, 2012, management initiated a restructuring plan that is designed to further align expenses with revenue and current market conditions. In order to reduce costs and operating expenses, this plan includes moving certain functions to lower cost geographies. The pretax charges will consist of approximately $9 million for severance-related charges that will affect approximately 200 employees, and $2 million for facility- and asset-related charges. Restructuring expense for this plan for 2012 was $9.4 million, which consists of expense of $9.2 million for severance-related charges and a $0.2 million charge for facility- and asset-related charges. By segment, total charges to date under this plan are $2.6 million for Optical, $3.1 million for Data, $0.9 million for Access, and $2.8 million for Services. Estimated cash payments under this plan are expected to be $9.7 million, of which $0.8 million has been paid through 2012. Other than the cash payments, actions under this plan are expected to be substantially completed by the end of the fourth quarter of 2013.

On January 30, 2012, management initiated a restructuring plan that aligns expenses with revenue. Tellabs stopped new development on the Tellabs^® SMARTCORE 9100 series for mobile packet core and consolidated

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research and development into fewer locations. The pretax charges for this plan will consist of approximately $23 million for severance-related charges of approximately 500 employees, $38 million for facility- and asset-related charges and $48 million for the accelerated amortization for abandoned intangible assets. Restructuring expense for this plan in 2012 was $108.8 million, which consists of expense of $23.2 million for severance-related charges, $36.7 million for facility- and asset-related charges, $47.7 million for the accelerated amortization of abandoned intangible assets, and $1.2 million for other obligations. By segment, total charges to date under this plan are $4.4 million for Optical, $100.7 million for Data, $1.5 million for Access, and $2.2 million for Services. Estimated cash payments under this plan are expected to be $30.6 million, of which $22.9 million has been paid through 2012. Other than the cash payments, actions under this plan are expected to be substantially completed by the end of the first quarter of 2013.

On July 25, 2011, management initiated a restructuring plan to align our cost structure to business conditions at that time. Net restructuring expense for this plan in 2012 was $1.5 million, which consists of a $0.9 million charge for facility- and asset-related charges and $0.6 million for severance-related charges. Cumulative restructuring charges for this plan are $21.3 million, which consists of $15.2 million for severance-related charges, $5.5 million for facility- and asset-related charges, and $0.6 million for other obligations. By segment, total charges to date under this plan are $8.6 million for Optical, $7.2 million for Data, $1.8 million for Access and $3.7 million for Services. Estimated cash payments under this plan are expected to be $18.9 million, of which $16.3 million has been paid through 2012. Other than the cash payments, restructuring actions under this plan were substantially completed in the second quarter of 2012.

On January 25, 2010, management initiated a restructuring plan to enable us to shift investment from TDM (Time Division Multiplexing) to Ethernet and IP products, move our supply chain closer to suppliers, and reduce general and administrative expenses. A restructuring credit for 2012 was $0.1 million for severance-related charges. The cumulative pretax restructuring charges for this plan are $9.7 million, which consists of $7.0 million for workforce reductions and $2.7 million for facility- and asset-related charges. By segment, total charges to date under this plan are $3.6 million for Optical, $5.3 million for Data, $0.5 million for Access and $0.3 million for Services. Total cash payments under this plan are $7.2 million which have been paid through 2012. Other than the cash payments, restructuring actions under this plan were completed in the first quarter of 2011.

Restructuring credit for previous restructuring plans for 2012 was $0.6 million for facility- and asset-related charges. These expenses are due to changes in previous estimates related to certain lease obligations.

The balance for restructuring plans relates to net lease obligations that expire through 2017 and cash severance that we expect to pay through the first quarter of 2015.

The following table summarizes restructuring and other charges recorded for the plans mentioned above, as well as adjustments for prior restructurings:

	2012		2011		2010
Severance and other termination benefits	$	32.9	$	15.9	$	6.9
Facility and other exit costs		37.3		3.8		2.6
Accelerated amortization of intangible assets		47.7		—		—
Other obligations		1.1		0.6		—
Total restructuring and other charges	$	119.0	$	20.3	$	9.5

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The following table summarizes our restructuring and other charges activity by segment during 2012 and 2011 and the status at year-end:

	Balance at 12/30/11		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/28/12
2012 Restructuring Plans
Optical	$	—	$	7.0		$	(2.2	)	$	(0.9	)	$	3.9
Data		—		103.8			(18.6	)		(76.6	)		8.6
Access		—		2.4			(0.7	)		(0.2	)		1.5
Services		—		5.0			(2.2	)		—			2.8
Subtotal 2012 Restructuring Plans		—		118.2			(23.7	)		(77.7	)		16.8
2011 Restructuring Plan
Optical		4.4		1.7			(5.1	)		(0.6	)		0.4
Data		5.5		—			(3.4	)		(0.2	)		1.9
Access		1.1		0.1			(0.9	)		—			0.3
Services		1.6		(0.3	)		(1.3	)		—			—
Subtotal 2011 Restructuring Plan		12.6		1.5			(10.7	)		(0.8	)		2.6
Previous Restructuring Plans
Optical		0.4		(0.1	)		(0.1	)		—			0.2
Data		1.9		—			(0.7	)		—			1.2
Access		2.6		(0.6	)		(0.9	)		—			1.1
Services		0.2		—			(0.2	)		—			—
Subtotal Previous Restructuring Plans		5.1		(0.7	)		(1.9	)		—			2.5
Total All Restructuring Plans	$	17.7	$	119.0		$	(36.3	)	$	(78.5	)	$	21.9

	Balance at 12/31/10		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/30/11
2011 Restructuring Plan
Optical	$	—	$	6.8		$	(1.5	)	$	(0.9	)	$	4.4
Data		—		7.2			(1.3	)		(0.4	)		5.5
Access		—		1.7			(0.5	)		(0.1	)		1.1
Services		—		4.0			(2.3	)		(0.1	)		1.6
Subtotal 2011 Restructuring Plan		—		19.7			(5.6	)		(1.5	)		12.6
2010 Restructuring Plans
Optical		1.1		0.2			(1.2	)		—			0.1
Data		0.8		0.4			(1.1	)		—			0.1
Access		0.5		—			(0.4	)		—			0.1
Services		—		0.2			(0.2	)		—			—
Subtotal 2010 Restructuring Plans		2.4		0.8			(2.9	)		—			0.3
Previous Restructuring Plans
Optical		1.8		(1.1	)		(0.4	)		—			0.3
Data		2.9		(0.4	)		(0.6	)		(0.1	)		1.8
Access		3.2		0.8			(1.4	)		(0.1	)		2.5
Services		0.5		0.5			(0.8	)		—			0.2
Subtotal Previous Restructuring Plans		8.4		(0.2	)		(3.2	)		(0.2	)		4.8
Total All Restructuring Plans	$	10.8	$	20.3		$	(11.7	)	$	(1.7	)	$	17.7

¹ Other activities include accelerated amortization related to abandoned intangible assets, accelerated depreciation of property, plant and equipment to be disposed, the effects of currency translation as well as other changes that do not flow through restructuring expense.

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3. Goodwill and Intangible Assets

Goodwill

Prior to the second quarter of 2012, we reported results of operations for three reporting segments: Broadband, Transport, and Services. As a result of strategy changes and internal reorganizations at the beginning of the second quarter of 2012, we are focusing on the Packet Optical (primarily our optical portfolio) and Mobile Backhaul (primarily our data portfolio) markets in addition to the on-going Access and Services businesses. With these strategic adjustments, we changed our reporting segments accordingly. Therefore, beginning with the second quarter of 2012, we have reported in the following four segments: Optical, Data, Access and Services (the Services segment was unchanged).

As of December 28, 2012, only the Services segment had goodwill totaling $122.1 million.

During the fourth quarter of 2012, we tested the Services segment for possible goodwill impairment as part of our annual review. As the Services segment’s estimated fair value was greater than its carrying value and no impairment indicators existed, further impairment tests were not deemed necessary and no impairment loss was recorded.

In the third quarter of 2011, we performed an interim review for the Broadband segment since we continued to experience a significant decline in business volume from a major customer that had an adverse impact on the results of the Broadband segment, and our overall market capitalization continued to fall below carrying value. As a result of our interim review, we recorded a goodwill impairment charge of $82.7 million, the full amount of Broadband segment goodwill. The Services segment did not incur an impairment of its goodwill since the fair value of the segment was determined to be greater than the carrying value.

	12/30/11
	Broadband			Services			Total
Beginning balance	$	82.7		$	122.2		$	204.9
Reductions		(82.7	)		—			(82.7	)
Currency translation adjustments		—			(0.2	)		(0.2	)
Ending balance	$	—		$	122.0		$	122.0

Intangible Assets

We amortize intangible assets with finite lives on a straight-line basis over their estimated useful lives. Trade names/trademarks were amortized over 4 to 12 months; customer relationships/backlog over 6 months to 9 years; non-compete agreements from 1.5 to 3 years; and developed technology over 2 to 7.5 years.

We evaluate the carrying value of intangible assets and other long-lived assets for impairment whenever indicators of impairment exist.

In conjunction with the January 30, 2012, restructuring plan, we recorded $47.7 million of accelerated amortization to Restructuring and other charges for abandoned intangible assets in the first quarter of 2012 related to the mobile packet core technology. As a result of the abandonment, we wrote these assets down to zero in the first quarter of 2012. In addition, the decrease in gross assets and accumulated amortization for certain assets in 2012 from 2011 was attributable to the removal of fully amortized and utilized assets.

Intangible assets with indefinite lives, which included IPR&D, were reviewed for impairment annually unless potential interim indicators existed that could have resulted in impairment. In conjunction with the interim goodwill impairment review, we assessed the valuation of the IPR&D in the third quarter of 2011. Updated management projections, related to the IPR&D which reflected a significant decline in anticipated business volumes, resulted in an impairment charge in the third quarter of 2011 of $20.0 million.

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The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows:

	12/28/12
	Gross Assets		Accumulated Amortization			Net
Developed technology	$	126.1	$	(125.8	)	$	0.3
Customer relationships		30.9		(26.8	)		4.1
Total	$	157.0	$	(152.6	)	$	4.4

	12/30/11
	Gross Assets			Accumulated Amortization			Net
Developed technology	$	212.8		$	(169.1	)	$	43.7
Customer relationships/backlog		35.2			(23.7	)		11.5
Trade names/trademarks		0.2			(0.2	)		—
Leasehold improvements 1		(2.7	)		2.3			(0.4	)
Non-compete arrangements		13.1			(10.8	)		2.3
Total	$	258.6		$	(201.5	)	$	57.1

¹  Leasehold improvements as of December 30, 2011, reflects a net reclass of $0.5 million to Restructuring and other charges due to the reduction of a facility.

Our intangible assets will be fully amortized by the end of 2015. The estimated amortization expense of intangible assets is $4.2 million for 2013, $0.1 million for 2014, and $0.1 million for 2015.

4. Fair Value Measurements

Our financial instruments consist of cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly.

Fair value is measured as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, a three-tier fair value hierarchy has been established, which prioritizes the inputs used in measuring fair value as follows:

• Level 1 – Observable inputs, such as quoted prices in active markets;

• Level 2 – Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and

• Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. In determining fair value for recurring financial assets and liabilities, we separate our financial instruments into three categories: marketable securities, other marketable securities and loan related to other marketable securities, and derivative financial instruments. These assets and liabilities are all valued based on the market approach that uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

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Marketable Securities

We use a third-party provider to determine fair values of marketable securities. The third-party provider receives market prices for each marketable security from a variety of industry-standard data providers, security master files from large financial institutions and other third-party sources with reasonable levels of price transparency. The third-party provider uses these multiple prices as inputs into a pricing model to determine a weighted average price for each security. Tellabs management compares the third-party pricing with pricing from outside investment managers and other market sources to ensure the third-party pricing is reasonable. We classify U.S. Treasury bills and bonds as Level 1 based upon quoted prices in active markets. All other marketable securities are classified as Level 2 based upon the other than quoted prices with observable market data. The type of instruments valued based upon the observable market data include U.S. government sponsored enterprise (agency) debt obligations, Federal Deposit Insurance Corporation (FDIC)-backed corporate debt obligations, investment grade corporate bonds, state and municipal debt obligations, mortgaged backed debt obligations guaranteed by the Government National Mortgage Association (GNMA), certain FDIC-backed bank certificates of deposit, foreign government debt obligations and foreign corporate debt obligations guaranteed by foreign governments.

Other Marketable Securities and Loan Related to Other Marketable Securities

We classify holdings in other marketable securities (Cisco common stock) and the related loan as Level 1 in the fair value hierarchy. We classify these as Level 1 since they are actively traded through a governed exchange.

Derivative Financial Instruments

Our foreign currency forward contracts are executed as exchange-traded. Market participants can be described as large money center or regional banks. Exchange-traded derivatives typically fall within Level 1 or Level 2 in the fair value hierarchy depending on whether they are deemed to be actively traded or not.

We have elected to value derivatives as Level 2, using observable market data at the measurement date and standard valuation techniques to convert future amounts to a single present amount (discounted). Key inputs for currency derivatives are the spot rate, interest rates and credit derivative swap spreads. The spot rate for each currency is the same spot rate used for all balance sheet translations at the measurement date. The following values are calculated from commonly quoted intervals available from a third-party financial information provider. Forward points and LIBOR rates are used to calculate a discount rate to apply to assets and liabilities. One-year credit default swap spreads are used to discount derivative assets, all of which have final maturities of less than 12 months. We calculate the discount to the derivative liabilities to reflect the potential credit risk to lenders and have used the spread over LIBOR based on the credit risk of our counterparties. Each asset is individually discounted to reflect our potential credit risk and we have used the spread over LIBOR based on similar credit risk. We do not adjust the fair value for immaterial credit risk.

We have applied a valuation method for financial assets and liabilities consistently during this period and prior periods. The following table sets forth by level within the fair value hierarchy “Financial instruments owned at fair value.” Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

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Assets and liabilities measured at fair value on a recurring basis are:

	Fair Value Measurements at December 28, 2012
	Balance at 12/28/12		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	31.1	$	31.1	$	—	$	—
Corporate debt obligations		9.6		—		9.6		—
Mortgaged backed debt obligations guaranteed by GNMA		55.5		—		55.5		—
Certificates of deposit guaranteed by FDIC		1.2		—		1.2		—
Foreign government debt obligations		161.1		—		161.1		—
Foreign corporate debt obligations guaranteed by foreign governments		122.2		—		122.2		—
Subtotal		380.7		31.1		349.6		—
Other marketable securities		195.1		195.1		—		—
Total assets	$	575.8	$	226.2	$	349.6	$	—
Liabilities
Loan related to other marketable securities	$	195.1	$	195.1	$	—	$	—
Derivative financial instruments		0.1		—		0.1		—
Total liabilities	$	195.2	$	195.1	$	0.1	$	—

	Fair Value Measurements at December 30, 2011
	Balance at 12/30/11		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	195.7	$	195.7	$	—	$	—
Corporate debt obligations guaranteed by FDIC		66.8		—		66.8		—
Corporate debt obligations		201.5		—		201.5		—
Mortgaged backed debt obligations guaranteed by GNMA		91.2		—		91.2		—
Certificates of deposit guaranteed by FDIC		1.5		—		1.5		—
Foreign government debt obligations		223.0		—		223.0		—
Foreign corporate debt obligations guaranteed by foreign governments		64.2		—		64.2		—
Subtotal		843.9		195.7		648.2		—
Other marketable securities		190.9		190.9		—		—
Derivative financial instruments		0.2		—		0.2		—
Total assets	$	1,035.0	$	386.6	$	648.4	$	—
Liabilities
Loan related to other marketable securities	$	190.9	$	190.9	$	—	$	—
Derivative financial instruments		0.2		—		0.2		—
Total liabilities	$	191.1	$	190.9	$	0.2	$	—

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5. Investments

Investments in marketable securities

At December 28, 2012, and December 30, 2011, available-for-sale marketable securities consisted of the following:

	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
December 28, 2012
U.S. government debt obligations	$	31.1	$	—	$	—		$	31.1
Corporate debt obligations		9.5		0.1		—			9.6
Mortgaged backed debt obligations guaranteed by GNMA		54.9		0.6		—			55.5
Certificates of deposit guaranteed by FDIC		1.2		—		—			1.2
Foreign government debt obligations		159.3		1.8		—			161.1
Foreign corporate debt obligations guaranteed by foreign governments		121.5		0.7		—			122.2
Total	$	377.5	$	3.2	$	—		$	380.7
December 30, 2011
U.S. government debt obligations	$	195.2	$	0.5	$	—		$	195.7
Corporate debt obligations guaranteed by FDIC		66.6		0.2		—			66.8
Corporate debt obligations		201.4		0.8		(0.7	)		201.5
Mortgaged backed debt obligations guaranteed by GNMA		90.9		0.4		(0.1	)		91.2
Certificates of deposit guaranteed by FDIC		1.5		—		—			1.5
Foreign government debt obligations		221.5		1.5		—			223.0
Foreign corporate debt obligations guaranteed by foreign governments		64.1		0.2		(0.1	)		64.2
Total	$	841.2	$	3.6	$	(0.9	)	$	843.9

The following table summarizes the maturities of our available-for-sale marketable securities at December 28, 2012:

	Amortized Cost		Fair Value
Less than 12 months	$	117.1	$	117.4
Due in 1 to 5 years		205.5		207.8
Due after 5 years		54.9		55.5
Total	$	377.5	$	380.7

Gross unrealized gains and losses related to fixed-income securities were caused by interest rate fluctuations. No other-than-temporary impairments were recorded in 2012. We recognized other-than-temporary impairments of $1.2 million in 2011. No other-than-temporary impairments were recorded in 2010.

Investments in marketable securities with unrealized losses at December 28, 2012, were negligible. Investments in marketable securities with unrealized losses at December 30, 2011, were as follows:

	Unrealized Loss					Unrealized Loss				Fair Value		Total Unrealized Loss
	Less than 12 months					Greater than 12 months
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
December 30, 2011
Corporate debt obligations	$	81.0	$	(0.7	)	$	—	$	—	$	81.0	$	(0.7	)
Mortgaged backed debt obligations guaranteed by GNMA		31.4		(0.1	)		—		—		31.4		(0.1	)
Foreign government debt obligations guaranteed by foreign governments		24.1		(0.1	)		—		—		24.1		(0.1	)
Total	$	136.5	$	(0.9	)	$	—	$	—	$	136.5	$	(0.9	)

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The following table presents gross realized gains and losses related to fixed income investments:

	2012			2011			2010
Gross realized gains	$	4.4		$	3.8		$	14.9
Gross realized losses 1		(1.3	)		(4.9	)		(2.7	)
Total	$	3.1		$	(1.1	)	$	12.2

¹  Includes other-than-temporary impairments of $1.2 million for the year ended December 30, 2011.

Other marketable securities and Loan related to other marketable securities

With the acquisition of Advanced Fibre Communications, Inc. (AFC) in 2004, we acquired 10.6 million shares of Cisco common stock, shown as Other marketable securities in Current Assets in our Consolidated Balance Sheets. Our Cisco common stock is classified as a trading security. In addition, we have a share loan arrangement with a financial institution for the same number of shares of Cisco common stock shown as Loan related to other marketable securities in Current Liabilities in our Consolidated Balance Sheets, which is due on demand.

As a result, we own the same number of Cisco shares as we have borrowed under the share loan arrangement; thereby, eliminating any market risk exposure associated with the share loan arrangement as increases (or decreases) in the value of Cisco stock are off-set equally by increases (or decreases) in the value of the shares of Cisco stock we own. In the event the counter-party financial institution to the share loan arrangement demands return of the borrowed Cisco shares, we will settle the obligation with our Cisco shares or with shares borrowed from another lender.

Other marketable securities and Loan related to other marketable securities was $195.1 million at a market price of $19.45 per share at December 28, 2012, and $190.9 million at a market price of $18.08 per share at December 30, 2011. The fees associated with the stock loan agreement were $1.2 million in 2012, $1.1 million in 2011 and $1.5 million in 2010, included in Interest income, net in the Consolidated Statements of Operations.

Additionally, in connection with our acquisition of AFC, we recorded a tax liability associated with a deferred gain relating to a settled hedging arrangement on the acquired Cisco shares. The deferred tax liability was $184.0 million as of December 28, 2012, and $195.2 million as of December 30, 2011.

The Cisco shares and related loan discussed above are maintained by us in order to defer recognition of the tax gain for income tax purposes. In the fourth quarter of 2012, we settled 0.6 million shares, reducing the number of borrowed shares to 10.0 million. In the future we may settle all or a portion of the remaining borrowed shares to the extent we are able to offset the gain by utilizing net operating loss or tax credit carryforwards. To the extent we cannot offset all or a portion of the gain, we may incur cash tax payments that could significantly reduce our cash and cash equivalents.

Long-term equity investments

In addition to the above investments, we maintain investments in partnerships and start-up technology companies. We include these investments in Other Assets, at cost. These investments totaled $1.8 million at December 28, 2012, and $3.2 million at December 30, 2011. We review each investment quarterly, including historical and projected financial performance, expected cash needs and recent funding events. We recognize other-than-temporary impairments if the market value of the investment is below its cost basis for an extended period of time or if the issuer has experienced significant financial declines or difficulties in raising capital to continue operations. We did not record other–than-temporary impairments for the year ended December 28, 2012. We recognized a gain of $3.0 million on the sale of a long-term equity investment for the year ended December 28, 2012. Other-than-temporary impairments were $1.0 million for the year ended December 30, 2011, and $3.8 million for the year ended December 31, 2010. Gains on the sale of long-term equity investments and other-than-temporary impairments are included in Other income (expense), net in the Consolidated Statements of Operations.

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6. Derivative Financial Instruments

Financial Contracts and Market Risk

We conduct business on a global basis in U.S. and foreign currencies, subjecting us to risks associated with fluctuating foreign exchange rates. To mitigate these risks, we use derivative foreign exchange contracts to address nonfunctional exposures that are expected to be settled in one year or less. The derivative foreign exchange contracts consist of foreign currency forward and option contracts.

Derivative financial contracts involve elements of market and credit risk. The market risk that results from these contracts relates to changes in foreign currency exchange rates, which generally are offset by changes in the value of the underlying assets or liabilities being held. Credit risk relates to the risk of nonperformance by a counterparty to one of the derivative contracts. We do not believe there is a significant credit risk associated with our hedging activities. We monitor the counterparties’ credit ratings and other market data to minimize credit risk. In addition, we also limit the aggregate contract amount entered into with any one financial institution to mitigate credit risk.

Cash Flow Hedges

We use foreign currency forward and option contracts, designated as cash flow hedges, to mitigate currency risk related to an imbalance of nonfunctional currency denominated costs and related revenue. We conduct monthly effectiveness tests of these hedging relationships on a spot-to-spot basis, excluding forward points. Effective gains and losses from derivative contracts are recorded in Accumulated other comprehensive income until the underlying transactions occur, at which time they are reclassified to Total cost of revenue. Ineffectiveness is recorded to Other income (expense), net. If it becomes probable that an anticipated transaction that is hedged will not occur, we immediately reclassify the gains or losses related to that hedge from Accumulated other comprehensive income to Other income (expense), net. At December 28, 2012, we did not have any cash flow hedges outstanding. We continue to monitor the Company’s overall currency exposure and may elect to add additional cash flow hedges in the future if deemed necessary.

Balance Sheet Hedges (Non-designated Hedges)

Short-term monetary assets and liabilities denominated in currencies other than the functional currency are remeasured through income as foreign currency rates fluctuate. Changes in the value of derivative contracts intended to offset these fluctuations are also recorded in income. These derivative contracts are not designated as hedges. At December 28, 2012, we held non-designated foreign currency forward contracts in 10 currencies, with a gross notional equivalent of $125.5 million. At December 31, 2011, we held non-designated foreign currency forward contracts in 11 currencies, with a gross notional equivalent of $151.9 million.

Net Investment Hedges

We entered into three-month foreign currency forward contracts and a three-month foreign currency collar contract, designated as net investment hedges, to hedge a portion of our net investment in one of our foreign subsidiaries to preserve the U.S. dollar value of our Euro cash. Effective changes in the fair value of these contracts, less applicable deferred income taxes are recorded within Accumulated other comprehensive income. Those amounts will be reflected in income only when we dispose of the investment in the foreign subsidiary. We conduct monthly effectiveness tests of net investment hedges on a spot-to-spot basis, excluding forward points, and any measurement of ineffectiveness is recorded in income. As of December 28, 2012, we had a net unrealized gain of $16.1 million in Accumulated other comprehensive income related to settled contracts. At December 28, 2012, we did not have any net investments hedges outstanding. As of December 30, 2011, we had a net unrealized gain of $18.6 million in Accumulated other comprehensive income, which includes a net gain of $18.5 million related to settled contracts and a net gain of $0.1 million related to unsettled contracts.

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The fair value of derivative instruments in the Consolidated Balance Sheet as of December 28, 2012, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Balance sheet hedges (Non-designated hedges)	$	—	$	0.1

The fair value of derivative instruments in the Consolidated Balance Sheet as of December 30, 2011, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Net investment hedges	$	0.1	$	—
Balance sheet hedges (Non-designated hedges)		0.1		0.2
Total derivatives	$	0.2	$	0.2

The effect of derivative instruments designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	(Loss) Gain Recognized in Accumulated OCI, net (Effective Portion)
	2012			2011		2010
Cash flow hedges	$	—		$	—	$	1.8
Net investment hedges	$	(2.5	)	$	1.9	$	6.5

	Gain Reclassified from Accumulated OCI into Total Cost of Revenue (Effective Portion)
	2012		2011		2010
Cash flow hedges	$	—	$	—	$	0.6

	Gain (Loss) Recognized in Other Income (Expense), net: Excluded from Effectiveness Testing Gain (Loss)
	2012		2011			2010
Net investment hedges	$	0.3	$	(0.6	)	$	—

The effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	Gain (Loss) Recognized in Other Income (Expense), net 1
	2012		2011		2010
Foreign currency forward and option contracts	$	1.9	$	1.0	$	(8.7	)

¹ The gains or losses from changes in the fair value of the derivative contracts are generally offset by gains or losses of the underlying transactions being hedged.

7. Product Warranties

We provide warranties for all of our products. The specific terms and conditions of those warranties vary depending on the product. We provide a basic limited warranty for periods ranging from 90 days to 6 years.

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The estimate of warranty liability involves many factors, including the number of units shipped, historical and anticipated rates of warranty claims, and cost per claim. We periodically assess the adequacy of the recorded warranty liability and adjust the amounts as necessary. Other adjustments to accruals for product warranties represent reductions due to favorable experience to previous estimates.

We classify the portion of warranty liability that we expect to incur in the next 12 months as a current liability. We classify the portion of warranty liability that we expect to incur more than 12 months in the future as a long-term liability. Product warranty liabilities are as follows:

Product warranty liabilities are as follows:

	12/28/12			12/30/11			12/31/10
Balance – beginning of year	$	17.0		$	19.4		$	31.4
Accruals for product warranties		6.1			7.8			6.1
Settlements		(4.2	)		(4.6	)		(4.6	)
Other adjustments to accruals for product warranties		(3.1	)		(5.6	)		(13.5	)
Balance – end of year	$	15.8		$	17.0		$	19.4
Balance sheet classification at end of year
Other accrued liabilities	$	6.8		$	7.9		$	7.5
Other long-term liabilities		9.0			9.1			11.9
Total product warranty liabilities	$	15.8		$	17.0		$	19.4

8. Equity-Based Compensation

The Tellabs, Inc. Amended and Restated 2004 Incentive Compensation Plan (2004 Plan) provides for the grant of short-term and long-term incentives, including stock options, stock appreciation rights (SARs), restricted stock and performance stock units (PSUs). Equity-based grants vest over one to three years, with the majority vesting over a three-year period. We recognize compensation expense for stock options, restricted stock and PSUs over the service period based on the fair value on the grant date. Stock options and SARs granted but unexercised expire 10 years from the grant date. Stockholders previously approved 53,889,977 shares for grant under the 2004 Plan, of which 19,207,529 remain available for grant at December 28, 2012.

Stock Options

We estimate the fair value of stock options using the Black-Scholes option-pricing model. This model requires the use of assumptions that will have a significant impact on the fair value estimate. The following table summarizes the assumptions used to compute the weighted average fair value of stock option grants:

	2012			2011			2010
Expected volatility		43.3	%		46.5	%		42.0	%
Risk-free interest rate		0.9	%		2.0	%		2.1	%
Expected term (in years)		5.3			5.3			5.3
Expected dividend yield		2.0	%		1.5	%		1.0	%

We based our calculation of expected volatility on a combination of historical and implied volatility for options granted. We based the risk-free interest rate on the U.S. Treasury yield curve in effect at the date of grant. We estimated the expected term of the options using their vesting period, post-vesting employment termination behavior and historical exercise patterns. We based the expected dividend yield on the option’s exercise price and annualized dividend rate at the date of grant.

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The following is a summary of stock option activity during 2012, and status at December 28, 2012:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in millions)
Outstanding – beginning of year		20,719,482		$	7.68
Granted		2,102,207		$	3.95
Exercised		(150,593	)	$	0.63
Forfeited/expired		(5,957,941	)	$	7.05
Outstanding – end of year		16,713,155		$	7.50		3.6	$	—
Exercisable – end of year		14,282,666		$	7.96		2.7	$	—
Options vested or expected to vest		16,566,555		$	7.53		3.6	$	—

The aggregate intrinsic value in the preceding table represents the total pretax intrinsic value, based on our closing stock price as of December 28, 2012, that the option holders would have received had all holders exercised their options as of that date. The aggregate intrinsic value of exercised stock options was $0.5 million in 2012, $1.5 million in 2011 and $4.5 million in 2010.

The weighted average fair value of stock options granted was $1.29 in 2012, $2.00 in 2011 and $2.97 in 2010.

Cash-Settled Stock Appreciation Rights

The 2004 Plan provides for the granting of cash-settled SARs in conjunction with, or independent of, the stock options under the 2004 Plan. These SARs allow the holder to receive in cash the difference between the cash-settled SARs’ grant price (the market value of our stock on the grant date) and the market value of our stock on the date the holder exercises the SAR. There were no cash payments in 2012 and the cash payments were negligible in 2011 and 2010. The following is a summary of cash-settled SARs activity in 2012:

	Shares			Weighted Average Exercise Price
Outstanding – beginning of year		492,131		$	6.81
Granted		16,200		$	3.98
Forfeited/expired		(52,136	)	$	7.15
Outstanding – end of year		456,195		$	6.67

Restricted Stock

The fair market value of restricted stock vested was $9.2 million in 2012, $11.4 million in 2011 and $16.9 million in 2010. The weighted average grant date fair value of restricted stock was $3.83 per share in 2012, $5.29 per share in 2011 and $8.68 per share in 2010. Restricted stock activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		4,854,587		$	6.29
Granted		2,810,166		$	3.83
Vested		(2,432,556	)	$	6.07
Forfeited		(1,332,332	)	$	6.21
Non-vested – end of year		3,899,865		$	4.68

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Performance Stock Units

The 2004 Plan provides for the granting of PSUs. We granted 1,963,478 PSUs in 2012, 1,660,290 PSUs in 2011 and 1,145,723 PSUs in 2010. The PSUs granted in 2012 entitle the recipients to receive shares of our common stock commencing in the first quarter of 2013, contingent on the achievement of operating earnings targets and strategic goals for the 2012 fiscal year. Following achievement of these measures and subject to continued employment, one-third of such shares will be issued in annual installments beginning in the first quarter of 2013. At maximum target performance, we will issue two shares for each PSU granted. The weighted average fair value of PSUs granted in 2012 was $3.98 per share. The number of PSUs to be issued in the first quarter of fiscal 2013 for the 2012 fiscal year is anticipated to be 1.0 share for each PSU granted, subject to continued employment.

The PSUs granted in 2011 entitle the recipients to receive shares of our common stock commencing in the first quarter of 2012, contingent on the achievement of strategic goals for 2011. Performance was based upon achieving market share and market penetration gains, product development achievement, and a customer service objective with respect to strategic goals. Under the executive plan, 50% of the PSUs were earned and 0.50 shares for each PSU will be paid out, subject to continued employment. We issued one-third (99,420 shares) of the total shares in the first quarter of 2012 and generally, one-third of such shares will be issued in annual installments in the first quarter of 2013 and the first quarter of 2014. Since 2011 minimum strategic goals were not met for the mobile internet plan, none of the PSUs were earned, no expense was incurred, and no amounts will be paid out with respect to them. The weighted average fair value of PSUs granted in 2011 was $5.39 per share.

The PSUs granted in 2010 entitle the recipients to receive shares of our common stock contingent on the achievement of operating earnings targets and strategic goals or on the achievement of revenue targets and strategic goals for 2010. Based on 2010 operating earnings of $237.0 million and market share and market penetration gains in some of the identified product areas, 125% of the PSUs were earned and 1.25 shares for each PSU (183,737 additional shares) granted will be paid out, subject to continued employment. We issued one-third of the total shares (306,155 shares) in the first quarter of 2011, issued 293,236 shares in 2012 and the remainder will be issued in the first quarter of 2013, subject to continued employment. The weighted average price of PSUs granted in 2010 was $7.72 per share. PSU activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		2,269,410		$	5.51
Granted		1,963,478		$	3.98
Vested		(847,680	)	$	5.27
Forfeited		(1,751,342	)	$	4.94
Non-vested – end of year		1,633,866		$	4.40

Equity-Based Compensation Expense

The following table sets forth the total equity-based compensation expense resulting from stock options, SARs, restricted stock, and PSUs by line item on the income statement:

	2012			2011			2010
Cost of revenue – products	$	1.1		$	1.6		$	2.0
Cost of revenue – services		1.7			2.1			2.3
Research and development		5.5			7.9			8.4
Sales and marketing		2.9			4.3			5.2
General and administrative		8.6			8.7			9.1
Equity-based compensation expense before income taxes		19.8			24.6			27.0
Income tax benefit		(0.4	)		(2.8	)		(8.6	)
Total equity-based compensation expense after income taxes	$	19.4		$	21.8		$	18.4

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The following table sets forth the total equity-based compensation expense by type:

	2012			2011			2010
Stock options	$	4.1		$	4.8		$	5.1
Cash-settled SARs		(0.1	)		(0.3	)		0.2
Restricted stock		11.4			16.9			17.0
Performance stock units		4.4			3.2			4.7
Total	$	19.8		$	24.6		$	27.0

As of December 28, 2012, we had $14.9 million of unrecognized equity-based compensation cost that we expect to recognize over a weighted average period of 1.7 years.

9. Employee Benefit and Retirement Plans

401(k) Plans

Our U.S. based employees may participate in the Tellabs 401(k) Plan. Upon meeting eligibility requirements, we match (dollar-for-dollar) up to the first 4% of the employee’s contribution. Both employee and employer contributions are vested immediately. The plan provides for a discretionary Company contribution, which is subject to Board of Directors approval and is funded entirely by the Company. The amount of the contribution, if approved, is based on a percent of pay for a specific period. All 401(k) eligible employees actively employed on the last business day of the declared period are immediately eligible to receive this fully vested contribution. The investment of these funds follows the participants’ elections on file for the program. The Board of Directors approved a 2% contribution for 2012, 2011 and 2010. We maintain similar plans for the benefit of eligible employees at most subsidiaries outside North America.

Contributions to these programs were $24.0 million in 2012, $27.6 million in 2011 and $27.5 million in 2010.

Deferred Income Plan

We provide a Deferred Income Plan that permits certain officers and management employees to defer portions of their compensation. As of December 28, 2012, the $16.7 million long-term portion of the deferred income obligation is included in Other Long-Term Liabilities and the $2.0 million current portion is included in Other accrued liabilities. Adjustments to reflect changes in the fair value of the amount owed to the employee are made to the applicable liability account with a corresponding charge (or credit) to compensation expense.

Retiree Medical Plan

We maintain a defined-benefit Retiree Medical Plan. Under the plan, we provide qualified retirees with a subsidy to offset their insurance premiums and allow the retirees to participate in the Company-sponsored healthcare plan. We made no contributions in 2012 or 2011. We currently do not anticipate making a contribution to the plan in 2013.

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The following table summarizes benefit obligations, plan assets and funded status of the Retiree Medical Plan:

	12/28/12			12/30/11
Change in benefit obligation
Accumulated postretirement benefit obligation – beginning of year	$	12.0		$	10.3
Service cost		0.7			0.7
Interest cost		0.6			0.6
Actuarial loss		0.5			1.4
Benefits paid		(0.3	)		(0.2	)
Curtailment		(0.4	)		(0.8	)
Accumulated postretirement benefit obligation – end of year	$	13.1		$	12.0
Change in plan assets
Assets at fair value – beginning of year	$	9.8		$	10.1
Return on plan assets		0.8			(0.1	)
Benefits paid		(0.2	)		(0.2	)
Assets at fair value – end of year	$	10.4		$	9.8
Funded status (included in Other Long-Term Liabilities)	$	(2.7	)	$	(2.2	)

Our investment strategy for the plan’s assets focuses on asset allocation and diversification. As a result, the assets are diversified across asset classes to achieve a conservative risk profile. The plan’s assets were 60% invested in fixed income securities and 40% invested in equity securities at December 28, 2012. The plan’s assets were 37% invested in a guaranteed income fund, 37% invested in equity securities and 26% invested in fixed income securities at December 30, 2011. The actuarial losses in 2012 and 2011 were caused primarily by the changes in the discount rate.

We use the three-tier fair value hierarchy to measure the fair value of these investments. We classify the guaranteed fund as a Level 2 asset because the fund’s value is based on the contract value as determined by the custodian. The other assets are classified as Level 1 because they are invested in highly liquid, publicly traded securities which are valued daily using quoted prices in active markets.

The following table presents by level, within the fair value hierarchy, the value of assets of the Retiree Medical Plan at December 28, 2012, and December 30, 2011:

	Fair Value Measurements at December 28, 2012
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	4.2	$	—	$	—	$	4.2
Fixed income securities		6.2		—		—		6.2
Total assets	$	10.4	$	—	$	—	$	10.4

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	Fair Value Measurements at December 30, 2011
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	3.6	$	—	$	—	$	3.6
Fixed income securities		2.6		—		—		2.6
Guaranteed income fund		—		3.6		—		3.6
Total assets	$	6.2	$	3.6	$	—	$	9.8

The following table summarizes components of net periodic benefit cost (credit) of the Retiree Medical Plan:

	2012			2011			2010
Components of net periodic postretirement benefit cost
Service cost	$	0.7		$	0.7		$	0.7
Interest cost		0.6			0.6			0.5
Expected return on assets		(0.6	)		(0.6	)		(0.6	)
Amortization of actuarial gain		(0.2	)		(0.3	)		(0.3	)
Amortization of unrecognized prior service cost		0.1			0.1			0.1
Net periodic postretirement benefit cost	$	0.6		$	0.5		$	0.4
Curtailment		(0.3	)		(0.7	)		—
Total cost (credit) for the year	$	0.3		$	(0.2	)	$	0.4

The curtailments of $0.3 million in 2012 and $0.7 million in 2011 were primarily due to the reduction of employees during 2012 and 2011. We amortize the prior service cost using a straight-line method over the average remaining years of service to full eligibility for benefits of the active Retiree Medical Plan participants. We expect to amortize $0.1 million of unrecognized prior service cost and $0.1 million of actuarial gain in 2013.

The following table summarizes the weighted average assumptions used to determine benefit costs and benefit obligations:

	2012			2011			2010
Discount rate used to determine benefit costs		5.00	%		5.75	%		6.00	%
Discount rate used to determine benefit obligation		4.50	%		5.00	%		5.75	%
Expected long-term rate of return on assets		6.50	%		6.50	%		6.50	%

There is no trend rate assumption required for this plan because all liabilities are related to a fixed-dollar subsidy and are not related to medical claims. Therefore, any change in future medical inflation trends or assumptions will not affect the liabilities of this plan.

The discount rates used to determine benefit costs and benefit obligations were based on hypothetical zero coupon corporate bond yield curves that replicate the cash flows of the plan. The discount rate used decreased in 2012 and 2011 due to the decrease in the hypothetical zero coupon corporate bond yield curve.

The long-term historical relationships between equities and fixed-income securities consistent with the widely accepted capital market principle that assets with higher volatility generate a greater return over the long run. The long-term portfolio return takes into consideration the diversification of our assets. We evaluate current market factors, such as inflation and interest rates, before determining long-term capital return. We also consider the evaluation of external investment advisors.

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The following table presents estimated future benefit payments for the Retiree Medical Plan as of December 28, 2012:

2013	$	0.3
2014	$	0.4
2015	$	0.4
2016	$	0.5
2017	$	0.5
2018 – 2022	$	3.8

There is $0.1 million of unrecognized prior service cost, net of tax, and $1.8 million of unrecognized net gain, net of tax, in Accumulated other comprehensive income at December 28, 2012.

10. Income Taxes

Components of (loss) earnings before income taxes are as follows:

	2012			2011			2010
Domestic source	$	(209.2	)	$	(264.3	)	$	134.9
Foreign source		60.6			69.3			56.6
(Loss) earnings before income tax	$	(148.6	)	$	(195.0	)	$	191.5

The provision for income tax (expense) benefit consists of the following:

	2012			2011			2010
Current
Federal	$	(2.9	)	$	12.9		$	(3.4	)
State		(0.7	)		(0.1	)		(2.9	)
Foreign		(13.8	)		(20.9	)		(13.1	)
Subtotal		(17.4	)		(8.1	)		(19.4	)
Deferred
Federal and state		(4.8	)		19.5			(10.2	)
Foreign		(0.9	)		(4.8	)		(6.3	)
Subtotal		(5.7	)		14.7			(16.5	)
Total income tax (expense) benefit	$	(23.1	)	$	6.6		$	(35.9	)

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Deferred tax (liabilities) assets for 2012 and 2011 consist of the following:

	12/28/12			12/30/11
Deferred tax assets
Net operating loss and tax credit carryforwards	$	229.6		$	179.5
Amortizable intangibles		41.8			34.8
Inventory reserves		29.8			30.6
Deferred employee benefit expenses		17.2			22.8
Accrued liabilities		15.3			14.7
Deferred compensation plan		6.1			13.7
Restructuring accruals		5.7			5.7
Deferred revenue and advance payments		5.2			4.8
Fixed assets and depreciation		4.6			—
Other		13.1			11.3
Deferred tax assets	$	368.4		$	317.9
Deferred tax liabilities
Unrealized gain on marketable securities	$	(184.8	)	$	(196.0	)
Unremitted earnings of non-U.S. subsidiaries		(48.0	)		—
Fixed assets and depreciation		—			(0.5	)
Other		(6.7	)		(5.1	)
Deferred tax liabilities		(239.5	)		(201.6	)
Valuation allowance		(134.3	)		(113.8	)
Net deferred tax (liabilities) assets	$	(5.4	)	$	2.5

The net deferred income tax asset decreased from $2.5 million at December 30, 2011, to a net deferred income tax liability of $5.4 million at December 28, 2012. The $7.9 million change is attributable to an increase in the domestic valuation allowance and in the deferred tax liabilities offset by an increase in the carryforward of net operating losses and credits. The deferred tax liability includes $184.0 million representing taxes that will be due on certain hedge contract gains upon termination of our Loan related to other marketable securities.

A reconciliation of the reported effective income tax rates to the domestic federal income tax rate is as follows:

In percentages	2012			2011			2010
Statutory Federal income tax rate		35.0	%		35.0	%		35.0	%
Valuation allowance on net domestic deferred tax assets		(46.1	)		(20.4	)		(11.6	)
State income tax, net of federal benefits1		(0.8	)		3.0			(4.9	)
Foreign earnings taxed at different rates		2.6			(2.2	)		1.8
Research and development credits		0.1			4.2			(1.4	)
Nondeductible equity-based compensation expense		(0.4	)		(0.4	)		0.3
Interest related to prior year tax matters		(0.2	)		(0.2	)		0.3
Tax exempt interest		—			—			(0.1	)
Goodwill impairment		—			(14.8	)		—
Other, net		(5.8	)		(0.8	)		(0.6	)
Effective income tax rate		(15.6	)%		3.4	%		18.8	%

¹  In 2010, state income tax, net of federal benefits, reflects a benefit of $9.4 million, including interest, related to the reversal of reserves no longer required due to a lapse in the statute of limitations.

Deferred Tax Valuation Allowance

A valuation allowance is established when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The net cumulative loss for the current and prior two years represents sufficient negative evidence for the Company to determine that a full valuation allowance be established against its domestic deferred tax assets. This valuation allowance will offset assets associated with future tax deductions and carryforward items. We continue to maintain a valuation allowance against deferred tax assets related to tax

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benefits from certain non-U.S. net operating losses and tax credit carryforwards. Until an appropriate level of profitability is attained, we expect to maintain a valuation allowance on our net U.S. and certain non-U.S. deferred tax assets.

During 2012, our valuation allowance increased by $20.5 million. Our domestic valuation allowance reflects an increase in deferred tax assets of $23.0 million as a result of our cumulative loss position. The valuation allowance against our foreign deferred tax assets decreased by $2.5 million as the result of a decrease in deferred tax assets.

Summary of Carryforwards

We had the following tax net operating loss (tax effected) and credit carryforwards as of December 28, 2012:

			Years of expiration
	12/28/12		Beginning	Ending
U.S. net operating loss and credit carryforwards	$	179.1	2016		2032
U.S. capital loss carryforwards		0.4	2016		2016
State net operating loss and credit carryforwards		20.1	2013		2032
State credit carryforwards		13.8	no expiration
Foreign net operating loss and credit carryforwards		13.2	2013		2031
Foreign net operating loss carryforwards		3.0	no expiration
Total	$	229.6

Accounting for Uncertainty in Income Taxes

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	12/28/12			12/30/11
Balance – beginning of year	$	11.4		$	17.2
Additions based on tax positions related to the current year		1.9			2.8
Additions for tax positions of prior years		0.6			—
Reductions for tax positions of prior years as a result of a lapse in the statute of limitations		(0.7	)		(4.1	)
Reductions for tax positions of prior years relating to settlements with taxing authorities		—			(4.5	)
Balance – end of year	$	13.2		$	11.4

The ending balance at December 28, 2012, includes an accrual of $7.2 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. We continue to recognize interest and penalties related to income tax matters as part of income tax expense. Our tax provision included $0.3 million of interest and penalties for 2012, $0.4 million for 2011, and $0.6 million for 2010. The balance of interest and penalties accrued was $0.9 million as of December 28, 2012, and $0.7 million as of December 30, 2011. At December 28, 2012, the noncurrent accrual for taxes and interest was $14.1 million.

It is reasonably possible that unrecognized benefits related to domestic income taxes will decrease up to approximately $1.0 million as a result of the settlement of audits or the expiration of the statute of limitations within the next 12 months.

It is reasonably possible that unrecognized benefits related to foreign income taxes will decrease by approximately $1.0 million to $2.0 million as a result of the settlement of audits or the expiration of the statute of limitations within the next 12 months.

Investment in Foreign Operations

During 2012, we determined that a dividend of approximately $367.0 million would be remitted from our foreign subsidiaries. We recorded deferred U.S. income tax of $48.0 million and foreign withholding taxes of $1.0 million on this dividend. We have not provided deferred U.S. income taxes and foreign withholding taxes

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on the remaining undistributed cumulative earnings of foreign subsidiaries because we consider such earnings to be permanently reinvested in those operations. The undistributed cumulative earnings of foreign subsidiaries that are considered permanently reinvested outside the United States were $259.3 million at December 28, 2012. Upon repatriation of these earnings, we would be subject to U.S. income tax, net of available foreign tax credits. At December 28, 2012, the estimated amount of this unrecognized deferred tax liability on permanently reinvested foreign earnings, based on current exchange rates and assuming we are able to use foreign tax credits, was $32.5 million.

Audits

We file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. We are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities in our major jurisdictions for years before 2007. Our major jurisdictions currently include the United States, California, Illinois, Finland, Mexico, the United Kingdom, Brazil, Argentina, China, India, Japan, Malaysia and the Philippines. We are currently under audit by the State of Illinois for the 2007 and 2008 tax periods, in India for the 2009 tax period and in the Philippines for the 2010 tax period. During 2013, we expect the Internal Revenue Service to begin an audit of our 2010 and 2011 tax periods. Although we have recorded tax reserves for potential adjustments to tax liabilities for prior years, we cannot provide assurance that a material adjustment to our financial statements, either positive or negative, will not result when the audits are concluded.

11. Accumulated Other Comprehensive Income

Accumulated other comprehensive income has no impact on our net (loss) earnings but is reflected in our consolidated balance sheet through adjustments to stockholders’ equity. Accumulated other comprehensive income derives from unrealized gains (losses) and related adjustments on available-for-sale securities, unrealized gains (losses) on cash flow and net investment hedges, foreign currency translation adjustments, unrecognized prior service costs and unrecognized net gains (losses) on our retiree medical plan.

Accumulated other comprehensive income (net of tax) for 2012, 2011 and 2010 consists of the following:

	Unrealized Net Gain (Loss) on Available- for-Sale Securities			Unrealized Net Gain (Loss) on Cash Flow Hedges			Foreign Currency Translation Adjustments			Unrecognized Prior Service Cost			Unrecognized Net Gain (Loss) on Retiree Medical Plan			Accumulated Other Comprehensive Income
Balance at January 1, 2010	$	4.7		$	(1.4	)	$	133.7		$	(0.4	)	$	3.2		$	139.8
Other Comprehensive Loss		(4.2	)		1.4			(29.0	)		0.1			0.5			(31.2	)
Balance at December 31, 2010	$	0.5		$	—		$	104.7		$	(0.3	)	$	3.7		$	108.6
Other Comprehensive Loss		1.4			—			(18.6	)		0.1			(1.7	)		(18.8	)
Balance at December 30, 2011	$	1.9		$	—		$	86.1		$	(0.2	)	$	2.0		$	89.8
Other Comprehensive Income		0.5			—			8.8			0.1			(0.2	)		9.2
Balance at December 28, 2012	$	2.4		$	—		$	94.9		$	(0.1	)	$	1.8		$	99.0

12. Segment Information

Prior to the second quarter of 2012, we reported results of operations for three reporting segments: Broadband, Transport, and Services. As a result of strategy changes and internal reorganizations at the beginning of the second quarter of 2012, we are focusing on the Packet Optical (primarily our optical portfolio) and Mobile Backhaul (primarily our data portfolio) markets in addition to the on-going Access and Services businesses. With these strategic adjustments, we changed our reporting segments accordingly. Therefore, beginning with the second quarter of 2012, we have reported in the following four segments: Optical, Data, Access and Services (the Services segment was unchanged).

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Optical segment products are primarily used to manage large volumes of telecommunication traffic in metro areas. The Optical segment includes Tellabs^® 5000 Series of Digital Cross-Connect systems, the Tellabs^® 6300 Managed Transport System, the Tellabs^® 7100 OTS and the Tellabs^® 7300 Metro Ethernet Switching Series.

Data segment products are primarily used in mobile backhaul applications, and for business services and various edge routing applications. The Data segment includes the Tellabs^® 8100 Managed Access Systems and the Tellabs 8600 and 8800 Smart Routers.

Access segment products are primarily used to enable service providers to bundle Internet, video, and voice over high-speed fiber-based networks and in Optical LAN applications. The Access segment includes the Tellabs^® 1000 and 1100 Multi-service Access systems, and the Tellabs^® 1600 Optical Network Terminals.

The Services segment delivers deployment, training, support and professional services to Tellabs’ customers. Through these offerings, Tellabs serves its customers through the phases of planning, deploying and operating a network.

We define segment profit as gross profit less research and development expenses. Segment profit excludes sales and marketing expenses, general and administrative expenses, the amortization of intangibles, restructuring and other charges, the impact of equity-based compensation and the goodwill and IPR&D impairment charges.

Consolidated revenue by segment follows:

	2012		2011		2010
Optical	$	432.0	$	482.1	$	644.2
Data		265.5		413.9		557.7
Access		156.5		166.4		198.1
Services		198.6		223.3		242.3
Total revenue	$	1,052.6	$	1,285.7	$	1,642.3

Segment profit and reconciliation to operating (loss) earnings by segment follows:

	2012			2011			2010
Optical	$	89.6		$	93.3		$	218.3
Data		(6.8	)		(6.6	)		168.4
Access		31.9			34.1			34.5
Services		70.0			75.3			81.2
Total segment profit	$	184.7		$	196.1		$	502.4
Sales and marketing expenses		(126.4	)		(163.0	)		(179.3	)
General and administrative expenses		(74.1	)		(80.9	)		(100.4	)
Inventory and purchase commitments for discontinued 9200 product		(8.1	)		—			—
Equity-based compensation		(8.4	)		(11.9	)		(12.5	)
Intangible asset amortization		(5.4	)		(20.2	)		(27.0	)
Restructuring and other charges		(119.0	)		(20.3	)		(9.5	)
Goodwill and IPR&D impairment		—			(102.7	)		—
Operating (loss) earnings	$	(156.7	)	$	(202.9	)	$	173.7

The segments use many of the same assets. For internal reporting purposes, we do not allocate assets by segment and therefore no asset, depreciation and amortization, or capital expenditure by segment information is provided to our chief operating decision maker.

During 2012, revenue from one customer accounted for 24% of consolidated revenue. In 2011, revenue from one customer accounted for 22% of consolidated revenue. In 2010, revenue from two customers accounted for 35% and 20% of consolidated revenue. We attribute revenue to customers based on the effective date of any relevant merger. Revenue from this major customer is earned in each operating segment.

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Consolidated revenue by country based on customer location follows:

	2012		2011		2010
United States	$	513.4	$	642.5	$	1,138.2
All other countries		539.2		643.2		504.1
Total	$	1,052.6	$	1,285.7	$	1,642.3

Long-lived assets by country follow:

	12/28/12		12/30/11
United States	$	312.3	$	407.3
Finland		57.9		55.8
All other countries		20.5		23.6
Total	$	390.7	$	486.7

13. Operating Lease Commitments

We have a number of operating lease agreements primarily involving office space, buildings and office equipment. These leases are non-cancelable and expire on various dates through 2022. As of December 28, 2012, future minimum lease commitments under non-cancelable leases are as follows:

2013	$	12.6
2014		9.9
2015		8.0
2016		6.4
2017		2.0
2018 and thereafter		1.5
Total minimum lease payments	$	40.4

Total rental expense was $13.1 million for 2012, $17.4 million for 2011 and $12.7 million for 2010.

14. Contingencies

Legal Proceedings

We are subject to legal claims and litigation arising in the ordinary course of business, such as employment or intellectual property claims, including the matters described below. We are unable to determine the likelihood of an unfavorable outcome against us and are unable to reasonably estimate a range of loss, if any.

Fujitsu Network Communications Inc. v. Tellabs, Inc. On January 28, 2008, Fujitsu Network Communications, Inc. and Fujitsu Limited filed a complaint in the United States District Court for the Eastern District of Texas against Tellabs in a case captioned Fujitsu Network Communications, Inc. and Fujitsu Limited v. Tellabs, Inc. and Tellabs Operations, Inc., Civil Action No. 6:08-cv-00022-LED. The complaint alleges infringement of U.S. Patent Nos. 5,526,163 (‘163 patent), 5,521,737 (‘737 patent), 5,386,418 (‘418 patent) and 6,487,686 (‘686 patent), and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. The case was thereafter transferred to the United States District Court for the Northern District of Illinois (Case No. 1:09-cv-04530). As to Fujitsu’s ‘686 patent, on November 4, 2010, the Court dismissed with prejudice Fujitsu’s claim for infringement of the patent and Fujitsu signed a covenant not to sue Tellabs for infringement of the patent as to any Tellabs products as they currently exist or existed in the past. As to Fujitsu’s ‘418 patent, on March 31, 2011, the Court denied Tellabs’ motion for summary judgment of invalidity based on indefiniteness and granted Fujitsu’s motion for summary judgment for judicial correction of an error in asserted Claim 1. On September 26, 2012, the Court granted a motion by Tellabs for summary

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judgment of invalidity of all asserted claims of the ‘418 patent, and judgment was entered in favor of Tellabs on its counterclaim for declaratory judgment of invalidity of the patent. Fujitsu is appealing this order and judgment. As to Fujitsu’s ‘737 patent, on September 27, 2012, the Court denied a motion by Tellabs for summary judgment of invalidity. A trial date of January 14, 2013 had been set by the Court to commence trial of Fujitsu’s ‘163 and ‘737 patents, however on November 1, 2012, the scheduled trial date was struck from the Court’s calendar in favor of an alternative trial date to be later determined. On December 21, 2012, the Court granted a motion by Tellabs for summary judgment on lost profits damages, and as a result Fujitsu Limited is precluded from pursuing the theory of lost profits. Tellabs contests any liability and will continue to vigorously defend itself accordingly.

Tellabs Operations, Inc. v. Fujitsu Limited and Fujitsu Network Communications Inc. On June 11, 2008, Tellabs Operations, Inc. filed a complaint in the United States District Court for the Northern District of Illinois against Fujitsu Limited and Fujitsu Network Communications, Inc. in a case captioned Tellabs Operations, Inc. v. Fujitsu Limited and Fujitsu Network Communications, Inc. Civil Action No. 1:08-cv-3379. The complaint alleged infringement of Tellabs Operations, Inc.’s U.S. Patent No. 7,369,772 (‘772 patent), and sought unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. Fujitsu Limited brought counterclaims alleging infringement of two U.S. patents, namely U.S. Patent Nos. 5,533,006 (‘006 patent) and 7,227,681 (‘681 patent), seeking unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. On March 31, 2011, the Court issued an Order granting Tellabs’ motion for summary judgment of invalidity of all claims of Fujitsu’s ’006 patent. As to Tellabs’ ‘772 patent, Fujitsu pursued an inter partes reexamination of the patent in the Patent Office which resulted in a December 12, 2011, decision by the Board of Patent Appeals and Interferences (BPAI) to reverse the Examiner’s decision to not reject the claims of the patent, as well as a January 9, 2013, BPAI decision affirming the Examiner’s rejection of amended claims of the patent. On February 14, 2013, Tellabs moved to dismiss all claims related to the ‘772 patent. As to Fujitsu’s ‘681 patent, in July, 2012, the Court denied a Tellabs’ motion for summary judgment of invalidity and granted Fujitsu’s motion for summary judgment finding no inequitable conduct. Trial on Fujitsu’s ’681 patent commenced on August 27, 2012, and concluded on September 7, 2012, whereupon the jury’s verdict the Court entered judgment in favor of Tellabs on Fujitsu’s claim for infringement of the ‘681 patent and in favor of Fujitsu on Tellabs’ claim for invalidity of the same patent, and the parties’ respective post-trial motions were denied by the Court on January 24, 2013. On February 19, 2013, the Court granted Tellabs’ motion to dismiss claims related to Tellabs’ ‘772 patent and terminated Civil Action No. 1:08-Cv-3379.

Fujitsu Limited v. Tellabs, Inc. On April 30, 2012, Fujitsu Limited filed a complaint in the United States District Court for the Northern District of Illinois against Tellabs in a case captioned Fujitsu Limited v. Tellabs Operations, Inc., Tellabs, Inc., and Tellabs North America, Inc., Civil Action No. 1:12-cv-03229. The complaint alleges infringement of U.S. Patent Nos. 5,526,163, 5,521,737, 5,386,418 and 7,227,681, the same patents at issue in pending Civil Action Nos. 1:09-cv-04530 and 1:08-cv-3379, and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. The complaint includes allegations of infringement that Fujitsu previously sought unsuccessfully to add to pending Civil Action Nos. 1:09-cv-04530 and 1:08-cv-3379. On June 4, 2012, the Tellabs defendants filed a motion to dismiss the Complaint pursuant to Fed. R. Civ. P. 12(B)(6), which the Court granted in part and denied in part on January 30, 2013. Tellabs has not yet filed a response to the complaint.

Telcordia Technologies Inc. v. Tellabs, Inc. On May 4, 2009, Telcordia Technologies, Inc. filed a complaint against Tellabs in the United States District Court for the District of New Jersey in a case captioned Telcordia Technologies Inc. v. Tellabs, Inc., Civil Action No. 2:09-cv-02089. The complaint alleges infringement of U.S. Patent Nos. 4,893,306, 4,835,763 and Re. 36,633, and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. On July 27, 2009, Telcordia filed a first amended complaint adding Tellabs Operations, Inc. and Tellabs North America, Inc. as additional defendants. On December 15, 2009, the Court granted Tellabs’ motion to transfer, which resulted in a transfer of the action to the United States District Court for the District of Delaware (Case No. 1:2009cv00978). The parties are in the early phases of discovery. A trial date has not yet been set.

Cheetah Omni, LLC v. Alcatel-Lucent USA Inc. et al. On July 29, 2011, a complaint was filed in the United States District Court for the Eastern District of Texas, Tyler Division, against Tellabs and several other

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companies in a case captioned Cheetah Omni LLC v. Alcatel-Lucent USA Inc. et al., Civil Action No. 6:11cv390. The complaint includes allegations of infringement by Tellabs, Inc., Tellabs Operations, Inc., and Tellabs North America, Inc., of U.S. Patent Nos. 6,888,661; 6,847,479; 6,856,459; and 6,940,647, and seeks unspecified damages, as well as interest, costs, disbursements, attorney fees and other remedies including injunctive relief. The accused products include products from the Tellabs 7100 product line. On December 5, 2012, the Court entered an order staying the proceedings with respect to US Patents 6,888,661 and 6,847,479 until such time as an injunction issued by the Court of the Eastern District of Michigan in a separate action involving the two patents is lifted. The parties are in discovery, and a Markman hearing was held on February 14, 2013. A trial date has been set for March 10, 2014.

Internet Machines LLC v. Avnet, Inc., et al. On February 13, 2012, a second amended complaint was filed in the United States District Court for the Eastern District of Texas, Tyler Division, naming Tellabs, Inc. among several defendants in a case captioned Internet Machines LLC v. Avnet, Inc., et al., Civil Action Nos. 6:10-CV-548-MHS and 6:11-CV-250-MHS (Consolidated). The plaintiff thereafter filed a third amended complaint on March 2, 2012. The amended complaints allege infringement of U.S. Patent Nos. 7,454,552, 7,421,532, 7,814,259 and 7,945,722, and seek unspecified damages including enhanced damages, as well as interest, costs, expenses, attorney fees and other remedies including injunctive relief. On March 27, 2012, Tellabs filed its answer, defenses and counterclaims in response to the third amended complaint. On September 4, 2012, the Court issued an Order granting a motion by the defendants to stay the litigation, whereby the litigation is stayed pending entry of a final non-appealable judgment in a prior proceeding in which Tellabs is not named (Internet Machines LLC v. Alienware Corp., No 6:10-cv-23 (E.D. Tex. Filed Feb. 2, 2010)).

Stockholder Class Action Lawsuits

Beginning on January 23, 2013, several purported stockholder class action lawsuits were filed in the United States District Court for the Northern District of Illinois, against Tellabs, Inc. and certain other of our current or former officers. The lawsuits are similar and purport to bring suit on behalf of those who purchased the Company’s publicly traded securities between October 26, 2010, and April 26, 2011. Plaintiffs allege that defendants made false and misleading statements, purport to assert claims for violations of the federal securities laws, and seek unspecified compensatory damages and other relief. The Company believes these claims are without merit and intends to defend the actions vigorously.

Apart from the matters described above, we are and in the future may be subject to various legal proceedings, claims and litigation arising in the ordinary course of business.

The proceedings described above, including the Fujitsu matters, the Telcordia matter, the Cheetah Omni matter, the Internet Machines matter, and the stockholder class action matters, involve costly litigation and may result in diverting management’s time, attention and resources, delaying or halting product shipments or services delivery, requiring us to pay amounts in any damages and/or settlements, requiring us to enter into royalty-bearing licensing arrangements or to obtain substitute technology of lower quality or higher costs, and otherwise imposing obligations or restrictions on us and our business. We may be unsuccessful in any such litigation, despite the time, money, energy and bases for our assertion and/or defense of the matters. We may also be unable, if necessary, to enter into licensing arrangements or to obtain substitute technology on commercially reasonable terms or any terms. Any such settlements or inability to prevail or mitigate any liability or to obtain such licensing arrangements or substitute technology may adversely affect our business, financial condition and operating results. See Item 1A, Risk Factors, of this Form 10-K.

15. Stock Repurchase Programs

We repurchase outstanding common stock under two plans authorized by our Board of Directors. In addition, we purchase shares to cover withholding taxes on shares issued under employee stock plans.

We intend to continue to use cash generated by employee stock option exercises (other than those of Company officers and board members) to repurchase stock through the use of a 10b5-1 plan. As of December 28, 2012, we have purchased 8.5 million shares of our common stock under this plan since February 2006, at a total cost of

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$101.4 million, including $0.1 million (27 thousand shares) in 2012 and $0.6 million (0.1 million shares) in 2011. On November 29, 2012, our Board of Directors authorized a one-year extension of this plan.

We intend to continue to make repurchases of our outstanding common stock under a previously authorized $600 million repurchase plan. As of December 28, 2012, we have purchased 56.6 million shares of our common stock under the $600 million repurchase plan at a total cost of $375.4 million, leaving $224.6 million available to be purchased under this plan. We purchased $22 thousand (9 thousand shares) in 2012. We did not purchase any shares under this plan in 2011.

We may change our repurchase activity and we provide no assurance that we will continue our repurchase activity in the future.

In addition, during 2012 we purchased 1.0 million shares for $3.7 million to cover minimum withholding taxes on shares issued under employee stock plans. In 2011, we purchased 0.9 million shares for $4.5 million to cover minimum withholding taxes on shares issued under employee stock plans.

We record repurchased shares as Treasury stock.

16. Net (Loss) Earnings per Share

The following table sets forth the computation of net (loss) earnings per share:

	2012			2011			2010
Numerator:
Net (loss) earnings	$	(171.7	)	$	(188.4	)	$	155.6
Denominator:
Denominator for basic net (loss) earnings per share – weighted average shares outstanding		367.0			364.5			378.1
Effect of dilutive securities:
Employee stock options and restricted and performance stock awards		—			—			4.6
Denominator for diluted net (loss) earnings per share – adjusted weighted average shares outstanding and assumed conversions		367.0			364.5			382.7
Net (loss) earnings per share, basic	$	(0.47	)	$	(0.52	)	$	0.41
Net (loss) earnings per share, diluted 1	$	(0.47	)	$	(0.52	)	$	0.41
Anti-dilutive employee equity-based awards, excluded (in shares) 2		19.3			23.2			18.5

¹  Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

²  We exclude certain employee equity-based awards from the weighted average shares outstanding computation because the exercise price was greater than the average market price of the common shares; therefore, the effect would have been anti-dilutive.

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17. Quarterly Financial Data (Unaudited)

Selected quarterly financial data for 2012 and 2011 follows:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
2012
Revenue	$	257.9		$	288.1		$	264.4		$	242.2
Gross profit	$	95.7		$	114.2		$	103.6		$	93.4
Net loss	$	(139.8	)	$	(4.7	)	$	(3.9	)	$	(23.3	)
Net loss per share 1 – Basic	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Diluted	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Cash dividends per share 2	$	0.02		$	0.02		$	0.02		$	1.02
2011
Revenue	$	322.4		$	316.7		$	329.8		$	316.8
Gross profit	$	122.3		$	115.2		$	136.3		$	134.5
Net loss	$	(24.1	)	$	(29.3	)	$	(130.1	)	$	(4.9	)
Net loss per share 1 – Basic	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Diluted	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Cash dividends per share	$	0.02		$	0.02		$	0.02		$	0.02

¹ The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

² Includes a special dividend of $1 per share in the fourth quarter of 2012.

18. Subsequent Event

On January 31, 2013, management initiated a restructuring plan that is designed to align expenses with revenue. Tellabs is discontinuing the development of the 9200 product and reducing operating expenses. Actions under this plan are expected to be substantially completed by the end of the second quarter of 2013. We expect to record pretax charges of approximately $38 million, primarily in the first quarter of 2013. The pretax charges will consist of $18 million for workforce reductions of approximately 300 employees, $16 million for facility- and asset-related charges, and $4 million for software license and other contract cancellations. Estimated cash payments under this plan are expected to be $25 million beginning in the first quarter of 2013 and continuing through the end of 2017.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

As of the end of the period covered by this report, our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”) carried out an evaluation under their supervision and with the participation of our management, of the effectiveness of disclosure controls and procedures and internal control over financial reporting.

Based on that evaluation, the CEO and CFO concluded that our disclosure controls and procedures are effective and there were no changes in internal control over financial reporting that have materially affected or are reasonably likely to materially affect internal control over financial reporting.

Management’s report on internal control over financial reporting and the attestation report of Ernst and Young LLP, our independent registered public accounting firm, on internal control over financial reporting is set forth in Item 8, Financial Statements and Supplementary Data of this Form 10-K.

ITEM 9B. OTHER INFORMATION

None.

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PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required is incorporated herein by reference to the sections entitled “Voting Information,” “Proposal 1- Election of Directors,” “Committees of the Board-Audit and Ethics Committee,” and “Section 16(a) Beneficial Ownership Reporting Compliance” in our Proxy Statement for our 2013 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the fiscal year ended December 28, 2012. Information related to Tellabs’ executive officers is set forth herein in Item 1, Business of this Form 10-K and is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

The information required is incorporated herein by reference to the sections entitled “Executive Compensation,” “Director Compensation,” and “Corporate Governance,” in our Proxy Statement for our 2013 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the fiscal year ended December 28, 2012.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required is incorporated herein by reference to the sections entitled “Security Ownership of Management” and “Security Ownership of Certain Beneficial Owners” in our Proxy Statement for our 2013 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the fiscal year ended December 28, 2012. Securities authorized for issuance under equity compensation plans is included in the notes to our consolidated financial statements included in Item 8 of this Form 10-K.

Equity Compensation Plan Table

The following table summarizes information as of December 28, 2012, relating to equity compensation plans of the Company pursuant to which Common Stock is authorized for issuance:

Plan category	Number of securities to be issued upon exercise of outstanding options, warrants and rights (a)		Weighted average exercise price of outstanding options, warrants and rights (b)		Number of securities remaining available for future issuance under  equity compensation plans (excluding securities reflected in column (a)) (c)
Equity compensation plans approved by security holders		15,959,756	$	7.36		28,053,519	1
Equity compensation plans not approved by security holders 2		753,399	$	10.49		—
Total		16,713,155	$	7.50		28,053,519

¹ Includes 19,207,529 securities available under the Amended and Restated 2004 Incentive Compensation Plan and 8,845,990 securities available under the 2005 Employee Stock Purchase Plan, which was suspended by the Company in 2007.

² All of these options were issued pursuant to option plans that were assumed in merger transactions. The Company has not made, and will not make, any future grants or awards of equity securities under these plans.

83

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required is incorporated herein by reference to the section entitled “Transactions with Related Persons,” “Policies and Procedures for Review and Approval of Related-Person Transactions” and “Corporate Governance” in our Proxy Statement for our 2013 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the fiscal year ended December 28, 2012.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required is incorporated herein by reference to the section entitled “Independent Registered Auditor’s Fees and Services” in our Proxy Statement for our 2013 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission not later than 120 days after the fiscal year ended December 28, 2012.

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) 1. Financial Statements:

The following Consolidated Financial Statements of Tellabs, Inc. and Subsidiaries is included herein:

Report of Independent Registered Public Accounting Firm

Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting

Consolidated Statements of Operations: Years ended December 28, 2012, December 30, 2011, and December 31, 2010

Consolidated Statements of Comprehensive (Loss) Income: Years ended December 28, 2012, December 30, 2011, and December 31, 2010

Consolidated Balance Sheets: December 28, 2012, and December 30, 2011

Consolidated Statements of Stockholders’ Equity: Years ended December 28, 2012, December 30, 2011, and December 31, 2010

Consolidated Statements of Cash Flows: Years ended December 28, 2012, December 30, 2011, and December 31, 2010

Notes to Consolidated Financial Statements

2. Financial Statement Schedule:

The following Consolidated Financial Statement Schedule of Tellabs, Inc. is included herein:

Schedule II. Valuation and Qualifying Accounts and Reserves

Other schedules have been omitted because they are not applicable or the required information is shown in the Consolidated Financial Statements or Notes thereto.

84

(b) Exhibits:

Exhibit Number	Description
2.1	Agreement and Plan of Merger among Tellabs, Inc., Tellabs Willow Corp. and WiChorus, Inc. dated as of October 20, 2009 22/
3.1	Restated Certificate of Incorporation and Amendments 9/
3.2	Fourth Amended and Restated By-Laws dated January 29, 2009 19/
10.1	Tellabs, Inc. Deferred Income Plan 16/
10.2	1986 Non-Qualified Stock Option Plan, as amended and restated 1/
10.3	Amendment to Tellabs, Inc. 1986 Non-Qualified Stock Option Plan (As Amended and Restated June 26, 1992) 4/
10.4	1991 Stock Option Plan, as amended and restated 1/
10.5	Amendment to Tellabs, Inc. 1991 Stock Option Plan (As Amended and Restated June 26, 1992) 4/
10.6	1994 Stock Option Plan 2/
10.7	Amendment to the Tellabs, Inc. 1994 Stock Option Plan 4/
10.8	Tellabs, Inc. 1998 Stock Option Plan 3/
10.9	Amendment to the Tellabs, Inc. 1998 Stock Option Plan 4/
10.10	Tellabs, Inc. 2001 Stock Option Plan 5/
10.11	Ocular Networks, Inc. Amended and Restated 2000 Stock Incentive Plan 6/
10.12	Tellabs Advantage Plan, as amended and restated 8/
10.13	First Amendment to the Tellabs Advantage Plan 8/
10.14	Second Amendment to the Tellabs Advantage Plan 8/
10.15	2004 Amendment to the Tellabs Advantage Plan 10/
10.16	2006 Amendment to the Tellabs Advantage Plan 14/
10.17	Vivace Networks, Inc. 1999 Equity Incentive Plan, as amended 13/
10.18	Tellabs, Inc. 2004 Incentive Compensation Plan 7/
10.19	Forms of Stock Award Statement, Stock Award Agreement and RSU Award Statement pertaining to Tellabs, Inc. 2004 Incentive Compensation Plan 10/
10.20	Advanced Fibre Communication, Inc. 1996 Stock Incentive Plan 10/
10.21	Form of Stock Option Agreement pertaining to the Advanced Fibre Communication, Inc. 1996 Plan 10/
10.22	Form of Automatic Stock Option Agreement pertaining to the Advanced Fibre Communication, Inc. 1996 Plan 10/
10.23	Form of Notice of Grant of Stock Option pertaining to the Advanced Fibre Communication, Inc. 1996 Plan 10/
10.24	Form of Notice of Grant of Non-Employee Director Automatic Stock Option pertaining to the Advanced Fibre Communication, Inc. 1996 Plan 10/
10.25	Form of Stock Issuance Agreement pertaining to the Advanced Fibre Communication, Inc. 1996 Plan 10/
10.26	2005 Tellabs, Inc. Employee Stock Purchase Plan 11/
10.27	Tellabs, Inc. Executive Continuity and Protection Program 11/
10.28	Form of Executive Performance Stock Units Statement and Award Agreement 12/
10.29	401(k) Plan as Amended and Restated Effective January 1, 2007 15/
10.30	Addendum Incorporating Economic Growth and Tax Relief Reconciliation Act of 2001 (EGTRRA) to Tellabs 401(k) Plan 15/
10.31	2008 Form of Executive Performance Stock Units Award Statement 18/
10.32	Tellabs, Inc. Amended and Restated 2004 Incentive Compensation Plan 17/
10.33	2009 Form of Executive Performance Stock Units Award Statement and Award Agreement 20/
10.34	Amendment to Tellabs 401(k) Plan 21/
10.35	2010 Form of Executive Performance Stock Units Award Statement and Terms 23/
10.36	Tellabs 401(k) Plan as Amended and Restated Effective January 1, 2009 23/

85

Exhibit Number	Description
10.37	Terms of Stock Awards under the Amended and Restated Tellabs, Inc. Incentive Compensation Plan 24/
10.38	2010 Amendment to Tellabs 401(k) Plan 25/
10.39	2011 Amendment to Tellabs, Inc. 2008 Deferred Income Plan 26/
10.40	2012 Amendment to Tellabs, Inc. Executive Continuity and Protection Plan 27/
21	Subsidiaries of the Registrant
23	Consent of Independent Registered Public Accounting Firm
31.1	CEO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	CFO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	CEO Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	CFO Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

Exhibits 10.1 through 10.40 contain, among other documents, management contracts or compensatory plans or arrangements required to be filed as an Exhibit to this Form 10-K pursuant to Item 15(b) hereof.

(c) Schedules: See Item 15(a)2 above.

1/ Incorporated by reference from Tellabs, Inc. Post-effective Amendment No. 1 on Form S-8 to Form S-4 filed on or about June 29, 1992 (File No. 33-45788).

2/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 31, 1993 (File No. 0-9692).

3/ Incorporated by reference from Tellabs, Inc. Definitive Proxy Statement filed on or about March 16, 1998 (File No. 0-9692).

4/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended June 30, 2000 (File No. 0-9692).

5/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended March 30, 2001 (File No. 0-9692).

6/ Incorporated by reference from Tellabs, Inc. Form S-8 filed on January 25, 2002 (File No. 333-81360).

7/ Incorporated by reference from Tellabs, Inc. Definitive Proxy Statement filed March 19, 2004 (File No. 0-9692).

8/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended January 2, 2004 (File No. 0-9692).

9/ Incorporated by reference from Tellabs, Inc. Form S-4 filed June 23, 2004 (File No. 333-116794).

10/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 31, 2004 (File No. 0-9692).

11/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended March 31, 2005 (File No. 0-9692).

12/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended September 29, 2006 (File No. 0-9692).

86

13/ Incorporated by reference from Tellabs, Inc. Form S-8 filed on July 29, 2003 (File No. 333-107457).

14/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 29, 2006 (File No. 0-9692).

15/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended September 28, 2007 (File No. 0-9692).

16/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 28, 2007 (File No. 0-9692).

17/ Incorporated by reference from Tellabs, Inc. Definitive Proxy Statement filed March 19, 2008 (File No. 0-9692).

18/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended March 28, 2008 (File No. 0-9692).

19/ Incorporated by reference from Tellabs, Inc. Form 8-K Current Report dated February 3, 2009 (File No. 0-9692).

20/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended April 3, 2009 (File No. 0-9692).

21/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended October 2, 2009 (File No. 0-9692).

22/ Incorporated by reference from Tellabs, Inc. Form 8-K Current Report filed October 22, 2009 (File No. 0-9692).

23/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended April 2, 2010 (File No. 0-9692).

24/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended July 2, 2010 (File No. 0-9692).

25/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 31, 2010 (File No. 0-9692).

26/ Incorporated by reference from Tellabs, Inc. Form 10-K Annual Report for the year ended December 30, 2011 (File No. 0-9692).

27/ Incorporated by reference from Tellabs, Inc. Form 10-Q Quarterly Report for the quarter ended June 29, 2012 (File No. 0-9692).

87

TELLABS, INC. AND SUBSIDIARIES

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

Three Years Ended December 28, 2012, December 30, 2011 and December 31, 2010

Accounts Receivable Allowances

In millions	Balance at Beginning of Year		Net Additions (Reductions) Charged to Costs and Expenses		Deductions		Currency Translation Adjustments			Balance at End of Year
2012	$	1.3	$	—	$	—	$	—		$	1.3
2011	$	1.3	$	—	$	—	$	—		$	1.3
2010	$	1.4	$	—	$	—	$	(0.1	)	$	1.3

88

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	TELLABS, INC.
February 22, 2013	/s/ Daniel P. Kelly Daniel P. Kelly
	President and Chief Executive Officer (Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

/s/ Daniel P. Kelly Daniel P. Kelly President and Chief Executive Officer (Principal Executive Officer)	February 22, 2013
/s/ Andrew B. Szafran Andrew B. Szafran Executive Vice President and Chief Financial Officer (Principal Financial Officer)	February 22, 2013
/s/ Thomas P. Minichiello Thomas P. Minichiello Vice President of Finance and Chief Accounting Officer (Principal Accounting Officer)	February 22, 2013
/s/ Michael J. Birck Michael J. Birck Chairman and Director	February 22, 2013
/s/ Bo Hedfors Bo Hedfors Director	February 22, 2013
/s/ Frank Ianna Frank Ianna Director	February 22, 2013
/s/ Vincent D. Kelly Vincent D. Kelly Director	February 22, 2013
/s/ Michael E. Lavin Michael E. Lavin Director	February 22, 2013
/s/ Stephanie Pace Marshall Stephanie Pace Marshall Director	February 22, 2013
/s/ Gregory J. Rossmann Gregory J. Rossmann Director	February 22, 2013
/s/ Dennis F. Strigl Dennis F. Strigl Director	February 22, 2013
/s/ Jan H. Suwinski Jan H. Suwinski Director	February 22, 2013
/s/ Vincent H. Tobkin Vincent H. Tobkin Director	February 22, 2013
/s/ Mikel H. Williams Mikel H. Williams Director	February 22, 2013

89

Exhibit Index

21	Subsidiaries of the Registrant
23	Consent of Independent Registered Public Accounting Firm
31.1	CEO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	CFO Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	CEO Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	CFO Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

90

EX-21

Exhibit 21

Tellabs, Inc. and Subsidiaries

Subsidiaries of the Registrant

as of December 28, 2012

Name	State or Other Jurisdiction of Incorporation
Tellabs Operations, Inc.	Delaware
Tellabs International, Inc.	Illinois
PT Tellabs Indonesia	Indonesia
Tellabs de Colombia Ltda	Colombia
Tellabs South Africa (Proprietary) Limited	South Africa
Tellabs Communications Canada Ltd.	Canada
Tellabs do Brasil, Ltda.	Brazil
Tellabs H.K. Limited	Hong Kong
Tellabs Pty Limited	Australia
Tellabs International de Mexico S.A. de C.V.	Mexico
Tellabs Asia Pacific Pte Ltd.	Singapore
Tellabs (Thailand) Co., Ltd.	Thailand
Tellabs Korea Limited	Korea
Tellabs India Private Limited	India
Tellabs Communications International Limited	China
Tellabs Communication Technologies (Shanghai) Limited	China
Tellabs Kabushiki Kaisha	Japan
Tellabs de Venezuela, S.A.	Venezuela
Tellabs Communications (Malaysia) Sdn. Bhd.	Malaysia
Tellabs (Malaysia) Sdn. Bhd. (49% joint venture)	Malaysia
Tellabs Philippines, Inc.	Philippines
Tellabs Holdings B.V.	The Netherlands
Tellabs Enterprises B.V.	The Netherlands
Tellabs Oy	Finland
TELLABS RUS LLC	Republic of Russian Federation
Kiinteisto Oy Mestarinkaarre	Finland
Kiinteisto Oy Sinimaentie 6	Finland
Tellabs Denmark A/S	Denmark
Tellabs Communications (India) Private Limited	India
Kring – Tellabs India Private Limited	India
Tellabs Holdings Limited	Ireland
Tellabs Limited	Ireland
Tellabs EMEA Holdings Limited	Ireland
Tellabs AB	Sweden
Tellabs Holdings SA (Proprietary) Limited	South Africa
Tellabs SAS	France
Tellabs Italia S.r.l.	Italy
Tellabs Netherlands B.V.	The Netherlands
Tellabs Poland Sp. z o.o.	Poland
Tellabs Southern Europe s.a. Sociedad Unipersonal (Spain)	Spain
Tellabs Deutschland GmbH	Germany
Tellabs Austria Vertriebs GmbH	Austria
Tellabs U.K. Ltd.	United Kingdom
Tellabs FZ-LLC	Dubai
EMEA TEL LAMP (EMEA TEL LAB)	Greece
Telecommunications Single Partner Limited Liability Company
Tellabs EMEA West Africa Ltd.	Nigeria
Tellabs North America, Inc.	Delaware
Tellabs Petaluma, Inc.	Delaware
Tellabs Vienna, Inc.	Delaware

Advanced Fibre Technology Communications (Hong Kong) Limited	Hong Kong
Hangzhou AFTEK Communication Company, Ltd.	China
Advanced Fibre Communications (HK) Limited	Hong Kong
AFC Foreign Sales Corporation	U.S. Virgin Islands
Tellabs Bedford, Inc.	Delaware
AccessLan India	India
Advanced Fibre Communications (India) Private Limited	India
Tellabs International GmbH	Switzerland
Advanced Fibre Communications Mexico S. de R.L. de C.V.	Mexico
Advanced Fibre Communications International Limited	Cayman Islands
AFC Harris Multimedia Communications Private Limited	Mauritius
AFC Harris Multimedia Communications Limited	India
Tellabs Mexico, Inc.	Delaware
Tellabs de Mexico, S.A. de C.V.	Mexico
Tellabs Nevada Holdings Corporation	Nevada
Tellabs Treasury Holdings Corporation	Nevada
Tellabs Equity Holdings Corporation	Nevada
Tellabs Securities Holdings Corporation	Nevada
Tellabs Pro Services, Inc.	Delaware
Tellabs Reston, Inc.	Delaware
WiChorus, Inc.	Delaware
Wichorus Design and Development Private Limited	India
WICHORUS (PRIVATE) LIMITED	Pakistan

EX-23

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statements (Form S-8 No. 33-45788, 33-48972, 33-55487, 333-87637, 333-81360, 333-107457, 333-122712, 333-128076, 333-159258 and 333-163900 and Form S-4 No. 333-116794) of our reports dated February 22, 2013, with respect to the consolidated financial statements of Tellabs, Inc. and subsidiaries and the effectiveness of internal control over financial reporting of Tellabs, Inc. and subsidiaries included in this Annual Report (Form 10-K) of Tellabs, Inc. for the year ended December 28, 2012.

/s/ Ernst & Young LLP

Chicago, Illinois

February 22, 2013

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Daniel P. Kelly, certify that:

1. I have reviewed this annual report on Form 10-K of Tellabs, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors:

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: February 22, 2013

/s/ Daniel P. Kelly

Daniel P. Kelly

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Andrew B. Szafran, certify that:

1. I have reviewed this annual report on Form 10-K of Tellabs, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors:

a) all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: February 22, 2013

/s/ Andrew B. Szafran

Andrew B. Szafran

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Tellabs, Inc. (the “Company”) on Form 10-K for the year ended December 28, 2012, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Daniel P. Kelly, the Chief Executive Officer of the Company, certify, pursuant to and for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Daniel P. Kelly

Daniel P. Kelly

Chief Executive Officer

Date: February 22, 2013

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Tellabs, Inc. (the “Company”) on Form 10-K for the year ended December 28, 2012, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Andrew B. Szafran, the Chief Financial Officer of the Company, certify, pursuant to and for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Andrew B. Szafran

Andrew B. Szafran

Chief Financial Officer

Date: February 22, 2013

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Segment Information (Tables)

12 Months Ended

Dec. 28, 2012

Consolidated Revenue by Segment

Consolidated revenue by segment follows:

	2012		2011		2010
Optical	$	432.0	$	482.1	$	644.2
Data		265.5		413.9		557.7
Access		156.5		166.4		198.1
Services		198.6		223.3		242.3
Total revenue	$	1,052.6	$	1,285.7	$	1,642.3

Segment Profit and Reconciliation to Operating (Loss) Earnings by Segment

Segment profit and reconciliation to operating (loss) earnings by segment follows:

	2012			2011			2010
Optical	$	89.6		$	93.3		$	218.3
Data		(6.8	)		(6.6	)		168.4
Access		31.9			34.1			34.5
Services		70.0			75.3			81.2
Total segment profit	$	184.7		$	196.1		$	502.4
Sales and marketing expenses		(126.4	)		(163.0	)		(179.3	)
General and administrative expenses		(74.1	)		(80.9	)		(100.4	)
Inventory and purchase commitments for discontinued 9200 product		(8.1	)		—			—
Equity-based compensation		(8.4	)		(11.9	)		(12.5	)
Intangible asset amortization		(5.4	)		(20.2	)		(27.0	)
Restructuring and other charges		(119.0	)		(20.3	)		(9.5	)
Goodwill and IPR&D impairment		—			(102.7	)		—
Operating (loss) earnings	$	(156.7	)	$	(202.9	)	$	173.7

Consolidated Revenue by Country Based on Customer Location

Consolidated revenue by country based on customer location follows:

	2012		2011		2010
United States	$	513.4	$	642.5	$	1,138.2
All other countries		539.2		643.2		504.1
Total	$	1,052.6	$	1,285.7	$	1,642.3

Long-Lived Assets by Country

Long-lived assets by country follow:

	12/28/12		12/30/11
United States	$	312.3	$	407.3
Finland		57.9		55.8
All other countries		20.5		23.6
Total	$	390.7	$	486.7

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Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Schedule of Investments [Line Items]
Other-than-temporary impairment		$ 1.2
Shares acquired in business acquisition	10.6
Value of Other marketable securities and Loan related to other marketable securities	195.1	190.9
Market price per share of other marketable securities and Loan related to other marketable securities	$ 19.45	$ 18.08
Fees associated with the stock loan agreement	1.2	1.1	1.5
Deferred tax liability that will be due on certain hedge contract gains upon termination of our Loan related to other marketable securities	184.0	195.2
Settlement of Stock Loan	0.6
Borrowed shares	10.0
Investments in partnerships and start-up technology companies	1.8	3.2
Investments in partnerships and start-up technology companies, other-than-temporary impairment		1.0	3.8
Sale of long-term equity investment, gain recognized	$ 3.0

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Allocation of Goodwill and Goodwill Activity (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011	Dec. 28, 2012
Goodwill [Line Items]
Beginning Balance	$ 204.9	$ 122.1
Reductions	(82.7)
Currency translation adjustments	(0.2)
Ending Balance	122.0	122.1
Broadband Segment
Goodwill [Line Items]
Beginning Balance	82.7
Reductions	(82.7)
Services
Goodwill [Line Items]
Beginning Balance	122.2	122.1
Currency translation adjustments	(0.2)
Ending Balance	$ 122.0	$ 122.1

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Schedule of Performance Stock Unit Activity (Detail) (Performance stock units, USD $)	12 Months Ended
	Dec. 28, 2012
Performance stock units
Shares
Beginning of year	2,269,410
Granted	1,963,478
Vested	(847,680)
Forfeited	(1,751,342)
Ending of year	1,633,866
Weighted Average Grant Date Fair Value
Non-vested - beginning of year	$ 5.51
Granted	$ 3.98
Vested	$ 5.27
Forfeited	$ 4.94
Non-vested - end of period	$ 4.40

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Investments in Marketable Securities with Unrealized Losses (Detail) (USD $) In Millions, unless otherwise specified	Dec. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Less than 12 months, Fair Value	$ 136.5
Unrealized Loss Less than 12 months, Unrealized Loss	(0.9)
Unrealized Loss Greater than 12 months, Fair Value
Unrealized Loss Greater than 12 months, Unrealized Loss
Total, Fair Value	136.5
Total, Unrealized Loss	(0.9)
Corporate debt obligations
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Less than 12 months, Fair Value	81.0
Unrealized Loss Less than 12 months, Unrealized Loss	(0.7)
Unrealized Loss Greater than 12 months, Fair Value
Unrealized Loss Greater than 12 months, Unrealized Loss
Total, Fair Value	81.0
Total, Unrealized Loss	(0.7)
Mortgaged backed debt obligations guaranteed by GNMA
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Less than 12 months, Fair Value	31.4
Unrealized Loss Less than 12 months, Unrealized Loss	(0.1)
Unrealized Loss Greater than 12 months, Fair Value
Unrealized Loss Greater than 12 months, Unrealized Loss
Total, Fair Value	31.4
Total, Unrealized Loss	(0.1)
Foreign corporate debt obligations guaranteed by foreign governments
Schedule of Available-for-sale Securities [Line Items]
Unrealized Loss Less than 12 months, Fair Value	24.1
Unrealized Loss Less than 12 months, Unrealized Loss	(0.1)
Unrealized Loss Greater than 12 months, Fair Value
Unrealized Loss Greater than 12 months, Unrealized Loss
Total, Fair Value	24.1
Total, Unrealized Loss	$ (0.1)

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Estimated Future Benefit Payments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012
Schedule of Postemployment Expected Future Benefit Payments [Line Items]
2013	$ 0.3
2014	0.4
2015	0.4
2016	0.5
2017	0.5
2018 - 2022	$ 3.8

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Summary of Restructuring and Other Charges Activity by Segment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 17.7		$ 10.8
Restructuring Expense	119.0		20.3		9.5
Cash Payments	(36.3)		(11.7)
Other Activities	(78.5)	[1]	(1.7)	[1]
Ending Balance	21.9		17.7		10.8
2012 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Expense	118.2
Cash Payments	(23.7)
Other Activities	(77.7)	[1]
Ending Balance	16.8
2012 Restructuring Plan | Optical Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Expense	7.0
Cash Payments	(2.2)
Other Activities	(0.9)	[1]
Ending Balance	3.9
2012 Restructuring Plan | Data segment
Restructuring Cost and Reserve [Line Items]
Restructuring Expense	103.8
Cash Payments	(18.6)
Other Activities	(76.6)	[1]
Ending Balance	8.6
2012 Restructuring Plan | Access segment
Restructuring Cost and Reserve [Line Items]
Restructuring Expense	2.4
Cash Payments	(0.7)
Other Activities	(0.2)	[1]
Ending Balance	1.5
2012 Restructuring Plan | Services segment
Restructuring Cost and Reserve [Line Items]
Restructuring Expense	5.0
Cash Payments	(2.2)
Ending Balance	2.8
2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning Balance	12.6
Restructuring Expense	1.5		19.7
Cash Payments	(10.7)		(5.6)
Other Activities	(0.8)	[1]	(1.5)	[1]
Ending Balance	2.6		12.6
2011 Restructuring Plan | Optical Segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	4.4
Restructuring Expense	1.7		6.8
Cash Payments	(5.1)		(1.5)
Other Activities	(0.6)	[1]	(0.9)	[1]
Ending Balance	0.4		4.4
2011 Restructuring Plan | Data segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5.5
Restructuring Expense			7.2
Cash Payments	(3.4)		(1.3)
Other Activities	(0.2)	[1]	(0.4)	[1]
Ending Balance	1.9		5.5
2011 Restructuring Plan | Access segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.1
Restructuring Expense	0.1		1.7
Cash Payments	(0.9)		(0.5)
Other Activities			(0.1)	[1]
Ending Balance	0.3		1.1
2011 Restructuring Plan | Services segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.6
Restructuring Expense	(0.3)		4.0
Cash Payments	(1.3)		(2.3)
Other Activities			(0.1)	[1]
Ending Balance			1.6
Previous Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Beginning Balance	5.1
Restructuring Expense	(0.7)
Cash Payments	(1.9)
Ending Balance	2.5
Previous Restructuring Plans | Optical Segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.4
Restructuring Expense	(0.1)
Cash Payments	(0.1)
Ending Balance	0.2
Previous Restructuring Plans | Data segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	1.9
Cash Payments	(0.7)
Ending Balance	1.2
Previous Restructuring Plans | Access segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2.6
Restructuring Expense	(0.6)
Cash Payments	(0.9)
Ending Balance	1.1
Previous Restructuring Plans | Services segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.2
Cash Payments	(0.2)
2010 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Beginning Balance			2.4
Restructuring Expense			0.8
Cash Payments			(2.9)
Ending Balance			0.3
2010 Restructuring Plan | Optical Segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			1.1
Restructuring Expense			0.2
Cash Payments			(1.2)
Ending Balance			0.1
2010 Restructuring Plan | Data segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0.8
Restructuring Expense			0.4
Cash Payments			(1.1)
Ending Balance			0.1
2010 Restructuring Plan | Access segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0.5
Cash Payments			(0.4)
Ending Balance			0.1
2010 Restructuring Plan | Services segment
Restructuring Cost and Reserve [Line Items]
Restructuring Expense			0.2
Cash Payments			(0.2)
Previous Restructuring Plans
Restructuring Cost and Reserve [Line Items]
Beginning Balance			8.4
Restructuring Expense			(0.2)
Cash Payments			(3.2)
Other Activities			(0.2)	[1]
Ending Balance			4.8
Previous Restructuring Plans | Optical Segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			1.8
Restructuring Expense			(1.1)
Cash Payments			(0.4)
Ending Balance			0.3
Previous Restructuring Plans | Data segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			2.9
Restructuring Expense			(0.4)
Cash Payments			(0.6)
Other Activities			(0.1)	[1]
Ending Balance			1.8
Previous Restructuring Plans | Access segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			3.2
Restructuring Expense			0.8
Cash Payments			(1.4)
Other Activities			(0.1)	[1]
Ending Balance			2.5
Previous Restructuring Plans | Services segment
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0.5
Restructuring Expense			0.5
Cash Payments			(0.8)
Ending Balance			$ 0.2

[1] Other activities include accelerated amortization related to abandoned intangible assets, accelerated depreciation of property, plant and equipment to be disposed, the effects of currency translation as well as other changes that do not flow through restructuring expense.

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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 28, 2012

Fair Value of Derivative Instruments in Consolidated Balance Sheet

The fair value of derivative instruments in the Consolidated Balance Sheet as of December 28, 2012, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Balance sheet hedges (Non-designated hedges)	$	—	$	0.1

The fair value of derivative instruments in the Consolidated Balance Sheet as of December 30, 2011, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Net investment hedges	$	0.1	$	—
Balance sheet hedges (Non-designated hedges)		0.1		0.2
Total derivatives	$	0.2	$	0.2

Derivatives Designated as Hedging Instrument

Effect of Derivative Instruments on Consolidated Statements of Operations

The effect of derivative instruments designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	(Loss) Gain Recognized in Accumulated OCI, net (Effective Portion)
	2012			2011		2010
Cash flow hedges	$	—		$	—	$	1.8
Net investment hedges	$	(2.5	)	$	1.9	$	6.5

	Gain Reclassified from Accumulated OCI into Total Cost of Revenue (Effective Portion)
	2012		2011		2010
Cash flow hedges	$	—	$	—	$	0.6

	Gain (Loss) Recognized in Other Income (Expense), net: Excluded from Effectiveness Testing Gain (Loss)
	2012		2011			2010
Net investment hedges	$	0.3	$	(0.6	)	$	—

Derivatives Not Designated as Hedging Instrument

Effect of Derivative Instruments on Consolidated Statements of Operations

The effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	Gain (Loss) Recognized in Other Income (Expense), net 1
	2012		2011		2010
Foreign currency forward and option contracts	$	1.9	$	1.0	$	(8.7	)

¹ The gains or losses from changes in the fair value of the derivative contracts are generally offset by gains or losses of the underlying transactions being hedged.

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Components of Loss Earnings before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
Domestic source	$ (209.2)	$ (264.3)	$ 134.9
Foreign source	60.6	69.3	56.6
(Loss) Earnings Before Income Tax	$ (148.6)	$ (195.0)	$ 191.5

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Employee Benefit and Retirement Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Employer matching percent for employee contributions	4.00%
Employer contribution approved by board of directors	2.00%	2.00%	2.00%
Employer contribution to defined contribution plans	$ 24.0	$ 27.6	$ 27.5
Long-term portion of the deferred income obligation is included in other long-term liabilities	16.7
Current portion of deferred income obligation is included in other accrued liabilities	2.0
Curtailment primarily due to reduction of employees	0.3	0.7
Amount of unrecognized prior service cost to be amortized in the next fiscal year	0.1
Amount of actuarial gain to be amortized in the next fiscal year	0.1
Unrecognized prior service cost, net of tax, included in accumulated other comprehensive income	0.1
Unrecognized net gain, net of tax, included in accumulated other comprehensive income	$ 1.8
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	60.00%	26.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	40.00%	37.00%
Guaranteed Income Fund
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage		37.00%

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Consolidated Revenue by Segment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total revenue	$ 242.2	$ 264.4	$ 288.1	$ 257.9	$ 316.8	$ 329.8	$ 316.7	$ 322.4	$ 1,052.6	$ 1,285.7	$ 1,642.3
Optical Segment
Segment Reporting Information [Line Items]
Segment Revenue									432.0	482.1	644.2
Data segment
Segment Reporting Information [Line Items]
Segment Revenue									265.5	413.9	557.7
Access segment
Segment Reporting Information [Line Items]
Segment Revenue									156.5	166.4	198.1
Services segment
Segment Reporting Information [Line Items]
Segment Revenue									$ 198.6	$ 223.3	$ 242.3

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Gross Realized Gains and Losses Related to Fixed Income Investments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment charges on investments	$ 1.2

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Components of Net Periodic Benefit (Credit) Cost (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.7	$ 0.7	$ 0.7
Interest cost	0.6	0.6	0.5
Expected return on assets	(0.6)	(0.6)	(0.6)
Amortization of actuarial gain	(0.2)	(0.3)	(0.3)
Amortization of unrecognized prior service cost	0.1	0.1	0.1
Net periodic postretirement benefit cost	0.6	0.5	0.4
Curtailment	(0.3)	(0.7)
Total (credit) cost for the year	$ 0.3	$ (0.2)	$ 0.4

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Reconciliation of Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011
Reconciliation of Unrecognized Tax Benefits [Line Items]
Balance - beginning of year	$ 11.4	$ 17.2
Additions based on tax positions related to the current year	1.9	2.8
Additions for tax positions of prior years	0.6
Reductions for tax positions of prior years as a result of a lapse in the statute of limitations	(0.7)	(4.1)
Reductions for tax positions of prior years relating to settlements with taxing authorities		(4.5)
Balance - end of year	$ 13.2	$ 11.4

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Deferred Tax Assets Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Components Of Deferred Income Tax Assets And Liabilities [Line Items]
Net operating loss and tax credit carryforwards	$ 229.6	$ 179.5
Amortizable intangibles	41.8	34.8
Inventory reserves	29.8	30.6
Deferred employee benefit expenses	17.2	22.8
Accrued liabilities	15.3	14.7
Deferred compensation plan	6.1	13.7
Restructuring accruals	5.7	5.7
Deferred revenue and advance payments	5.2	4.8
Fixed assets and depreciation	4.6
Other	13.1	11.3
Deferred tax assets	368.4	317.9
Unrealized gain on marketable securities	(184.8)	(196.0)
Unremitted earnings of non-U.S. subsidiaries	(48.0)
Fixed assets and depreciation		(0.5)
Other	(6.7)	(5.1)
Deferred tax liabilities	(239.5)	(201.6)
Valuation allowance	(134.3)	(113.8)
Net deferred tax (liabilities) assets	$ (5.4)	$ 2.5

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Accumulated Other Comprehensive Loss Income Net of Tax (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized Net Gain (Loss) on Available-for-Sale Securities, Beginning Balance	$ 1.9	$ 0.5	$ 4.7
Unrealized net gain (loss) on available-for-sale securities	0.5	1.4	(4.2)
Unrealized Net Gain (Loss) on Available-for-Sale Securities, Ending Balance	2.4	1.9	0.5
Other Comprehensive Income Unrealized Gain (Loss) On Cash Flow Hedges, Beginning Balance			(1.4)
Unrealized Net Gain (Loss) On Cash Flow Hedges			1.4
Foreign Currency Translation Adjustments, Beginning Balance	86.1	104.7	133.7
Foreign Currency Translation Adjustment	8.8	(18.6)	(29.0)
Foreign Currency Translation Adjustments, Ending Balance	94.9	86.1	104.7
Unrecognized Prior Service Cost, Beginning Balance	(0.2)	(0.3)	(0.4)
Unrecognized prior service cost	0.1	0.1	0.1
Unrecognized Prior Service Cost, Ending Balance	(0.1)	(0.2)	(0.3)
Unrecognized Net Gain (Loss) on Retiree Medical Plan, Beginning Balance	2.0	3.7	3.2
Unrecognized net gain (loss) on retiree medical plan	(0.2)	(1.7)	0.5
Unrecognized Net Gain (Loss) on Retiree Medical Plan, Ending Balance	1.8	2.0	3.7
Accumulated Other Comprehensive Income, Beginning Balance	89.8	108.6	139.8
Other comprehensive income (loss)	9.2	(18.8)	(31.2)
Accumulated Other Comprehensive Income, Ending Balance	$ 99.0	$ 89.8	$ 108.6

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Weighted Average Assumptions Used to Determine Benefit Costs and Benefit Obligations (Detail)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Employee Benefit Plans [Line Items]
Discount rate used to determine benefit costs	5.00%	5.75%	6.00%
Discount rate used to determine benefit obligation	4.50%	5.00%	5.75%
Expected long-term rate of return on assets	6.50%	6.50%	6.50%

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Schedule of Equity Based Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	$ 19.8	$ 24.6	$ 27.0
Income tax benefit	(0.4)	(2.8)	(8.6)
Total equity-based compensation expense after income taxes	19.4	21.8	18.4
Cost of Revenue - products
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	1.1	1.6	2.0
Cost of Revenue - services
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	1.7	2.1	2.3
Research and Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	5.5	7.9	8.4
Sales And Marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	2.9	4.3	5.2
General and Administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Equity-based compensation expense before income taxes	$ 8.6	$ 8.7	$ 9.1

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Quarterly Financial Data

12 Months Ended

Dec. 28, 2012

Quarterly Financial Data

17. Quarterly Financial Data (Unaudited)

Selected quarterly financial data for 2012 and 2011 follows:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
2012
Revenue	$	257.9		$	288.1		$	264.4		$	242.2
Gross profit	$	95.7		$	114.2		$	103.6		$	93.4
Net loss	$	(139.8	)	$	(4.7	)	$	(3.9	)	$	(23.3	)
Net loss per share 1 – Basic	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Diluted	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Cash dividends per share 2	$	0.02		$	0.02		$	0.02		$	1.02
2011
Revenue	$	322.4		$	316.7		$	329.8		$	316.8
Gross profit	$	122.3		$	115.2		$	136.3		$	134.5
Net loss	$	(24.1	)	$	(29.3	)	$	(130.1	)	$	(4.9	)
Net loss per share 1 – Basic	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Diluted	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Cash dividends per share	$	0.02		$	0.02		$	0.02		$	0.02

¹ The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

² Includes a special dividend of $1 per share in the fourth quarter of 2012.

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Gross Carrying Amount and Accumulated Amortization of Intangible Assets Subject to Amortization (Parenthetical) (Detail) (Leasehold improvements, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011
Leasehold improvements
Finite-Lived Intangible Assets [Line Items]
Intangible reclass to restructuring	$ 0.5

XML

Quarterly Financial Data (Tables)

12 Months Ended

Dec. 28, 2012

Selected Quarterly Financial Data

Selected quarterly financial data for 2012 and 2011 follows:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
2012
Revenue	$	257.9		$	288.1		$	264.4		$	242.2
Gross profit	$	95.7		$	114.2		$	103.6		$	93.4
Net loss	$	(139.8	)	$	(4.7	)	$	(3.9	)	$	(23.3	)
Net loss per share 1 – Basic	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Diluted	$	(0.38	)	$	(0.01	)	$	(0.01	)	$	(0.06	)
Cash dividends per share 2	$	0.02		$	0.02		$	0.02		$	1.02
2011
Revenue	$	322.4		$	316.7		$	329.8		$	316.8
Gross profit	$	122.3		$	115.2		$	136.3		$	134.5
Net loss	$	(24.1	)	$	(29.3	)	$	(130.1	)	$	(4.9	)
Net loss per share 1 – Basic	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Diluted	$	(0.07	)	$	(0.08	)	$	(0.36	)	$	(0.01	)
Cash dividends per share	$	0.02		$	0.02		$	0.02		$	0.02

¹ The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

² Includes a special dividend of $1 per share in the fourth quarter of 2012.

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Fair Value of Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 10.4	$ 9.8	$ 10.1
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	4.2	3.6
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	6.2	2.6
Guaranteed Income Fund
Defined Benefit Plan Disclosure [Line Items]
Total assets		3.6
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets	10.4	6.2
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	4.2	3.6
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	6.2	2.6
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets		3.6
Significant Other Observable Inputs (Level 2) | Guaranteed Income Fund
Defined Benefit Plan Disclosure [Line Items]
Total assets		$ 3.6

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Computation of Net Loss Per Share (Parenthetical) (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011
Earnings Per Share Disclosure [Line Items]
Diluted weighted average shares outstanding in the absence of a loss	368.8	367.6

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Income Taxes (Tables)

12 Months Ended

Dec. 28, 2012

Components of (Loss) Earnings before Income Taxes

Components of (loss) earnings before income taxes are as follows:

	2012			2011			2010
Domestic source	$	(209.2	)	$	(264.3	)	$	134.9
Foreign source		60.6			69.3			56.6
(Loss) earnings before income tax	$	(148.6	)	$	(195.0	)	$	191.5

Provision for Income Tax (Expense) Benefit

The provision for income tax (expense) benefit consists of the following:

	2012			2011			2010
Current
Federal	$	(2.9	)	$	12.9		$	(3.4	)
State		(0.7	)		(0.1	)		(2.9	)
Foreign		(13.8	)		(20.9	)		(13.1	)
Subtotal		(17.4	)		(8.1	)		(19.4	)
Deferred
Federal and state		(4.8	)		19.5			(10.2	)
Foreign		(0.9	)		(4.8	)		(6.3	)
Subtotal		(5.7	)		14.7			(16.5	)
Total income tax (expense) benefit	$	(23.1	)	$	6.6		$	(35.9	)

Deferred Tax Assets (Liabilities)

Deferred tax (liabilities) assets for 2012 and 2011 consist of the following:

	12/28/12			12/30/11
Deferred tax assets
Net operating loss and tax credit carryforwards	$	229.6		$	179.5
Amortizable intangibles		41.8			34.8
Inventory reserves		29.8			30.6
Deferred employee benefit expenses		17.2			22.8
Accrued liabilities		15.3			14.7
Deferred compensation plan		6.1			13.7
Restructuring accruals		5.7			5.7
Deferred revenue and advance payments		5.2			4.8
Fixed assets and depreciation		4.6			—
Other		13.1			11.3
Deferred tax assets	$	368.4		$	317.9
Deferred tax liabilities
Unrealized gain on marketable securities	$	(184.8	)	$	(196.0	)
Unremitted earnings of non-U.S. subsidiaries		(48.0	)		—
Fixed assets and depreciation		—			(0.5	)
Other		(6.7	)		(5.1	)
Deferred tax liabilities		(239.5	)		(201.6	)
Valuation allowance		(134.3	)		(113.8	)
Net deferred tax (liabilities) assets	$	(5.4	)	$	2.5

Reconciliation of Reported Effective Income Tax Rate to Domestic Federal Income Tax Rate

A reconciliation of the reported effective income tax rates to the domestic federal income tax rate is as follows:

In percentages	2012			2011			2010
Statutory Federal income tax rate		35.0	%		35.0	%		35.0	%
Valuation allowance on net domestic deferred tax assets		(46.1	)		(20.4	)		(11.6	)
State income tax, net of federal benefits1		(0.8	)		3.0			(4.9	)
Foreign earnings taxed at different rates		2.6			(2.2	)		1.8
Research and development credits		0.1			4.2			(1.4	)
Nondeductible equity-based compensation expense		(0.4	)		(0.4	)		0.3
Interest related to prior year tax matters		(0.2	)		(0.2	)		0.3
Tax exempt interest		—			—			(0.1	)
Goodwill impairment		—			(14.8	)		—
Other, net		(5.8	)		(0.8	)		(0.6	)
Effective income tax rate		(15.6	)%		3.4	%		18.8	%

¹  In 2010, state income tax, net of federal benefits, reflects a benefit of $9.4 million, including interest, related to the reversal of reserves no longer required due to a lapse in the statute of limitations.

Tax Net Operating Loss (Tax Effected) and Credit Carryforwards

We had the following tax net operating loss (tax effected) and credit carryforwards as of December 28, 2012:

			Years of expiration
	12/28/12		Beginning	Ending
U.S. net operating loss and credit carryforwards	$	179.1	2016		2032
U.S. capital loss carryforwards		0.4	2016		2016
State net operating loss and credit carryforwards		20.1	2013		2032
State credit carryforwards		13.8	no expiration
Foreign net operating loss and credit carryforwards		13.2	2013		2031
Foreign net operating loss carryforwards		3.0	no expiration
Total	$	229.6

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	12/28/12			12/30/11
Balance – beginning of year	$	11.4		$	17.2
Additions based on tax positions related to the current year		1.9			2.8
Additions for tax positions of prior years		0.6			—
Reductions for tax positions of prior years as a result of a lapse in the statute of limitations		(0.7	)		(4.1	)
Reductions for tax positions of prior years relating to settlements with taxing authorities		—			(4.5	)
Balance – end of year	$	13.2		$	11.4

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Available for Sale Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 377.5	$ 841.2
Unrealized Gain	3.2	3.6
Unrealized Loss		(0.9)
Fair Value	380.7	843.9
U.S. government debt obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	31.1	195.2
Unrealized Gain		0.5
Fair Value	31.1	195.7
Corporate debt obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9.5	201.4
Unrealized Gain	0.1	0.8
Unrealized Loss		(0.7)
Fair Value	9.6	201.5
Mortgaged backed debt obligations guaranteed by GNMA
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	54.9	90.9
Unrealized Gain	0.6	0.4
Unrealized Loss		(0.1)
Fair Value	55.5	91.2
Certificates of deposit guaranteed by FDIC
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1.2	1.5
Fair Value	1.2	1.5
Foreign government debt obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	159.3	221.5
Unrealized Gain	1.8	1.5
Fair Value	161.1	223.0
Foreign corporate debt obligations guaranteed by foreign governments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	121.5	64.1
Unrealized Gain	0.7	0.2
Unrealized Loss		(0.1)
Fair Value	122.2	64.2
Corporate debt obligations guaranteed By FDIC
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		66.6
Unrealized Gain		0.2
Fair Value		$ 66.8

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Schedule of Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 28, 2012
Shares
Outstanding - beginning of year	20,719,482
Granted	2,102,207
Exercised	(150,593)
Forfeited/expired	(5,957,941)
Outstanding - end of year	16,713,155
Exercisable - end of year	14,282,666
Shares vested or expected to vest	16,566,555
Weighted Average Exercise Price
Outstanding - beginning of year	$ 7.68
Granted	$ 3.95
Exercised	$ 0.63
Forfeited/expired	$ 7.05
Outstanding - end of year	$ 7.50
Exercisable - end of year	$ 7.96
Shares vested or expected to vest	$ 7.53
Weighted Average Remaining Contractual Term (in years)
Outstanding - end of year	3 years 7 months 6 days
Exercisable - end of year	2 years 8 months 12 days
Shares vested or expected to vest	3 years 7 months 6 days
Aggregate Intrinsic Value
Outstanding - end of period
Exercisable - end of period
Shares vested or expected to vest

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Effect of Derivative Instruments not Designated as Hedging Instruments on Consolidated Statements of Operations (Detail) (Foreign Currency Forward And Option Contracts, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Foreign Currency Forward And Option Contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Other Expense, net	$ 1.9	[1]	$ 1.0	[1]	$ (8.7)	[1]

[1] The gains or losses from changes in the fair value of the derivative contracts are generally offset by gains or losses of the underlying transactions being hedged.

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Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended		12 Months Ended									3 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Aug. 30, 2011 IPR&D	Mar. 30, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Trade Names/Trademarks Minimum	Dec. 28, 2012 Trade Names/Trademarks Maximum	Dec. 28, 2012 Customer Relationship Minimum	Dec. 28, 2012 Customer Relationship Maximum	Dec. 28, 2012 Non-compete arrangements Minimum	Dec. 28, 2012 Non-compete arrangements Maximum	Dec. 28, 2012 Developed technology Minimum	Dec. 28, 2012 Developed technology Maximum	Sep. 30, 2011 Broadband Segment	Dec. 28, 2012 Services	Dec. 30, 2011 Services	Dec. 31, 2010 Services
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 122.1	$ 122.0	$ 204.9													$ 122.1	$ 122.0	$ 122.2
Goodwill impairment charge															82.7
Finite-lived intangible assets, useful life							4 months	12 months	6 months	9 years	1 year 6 months	3 years	2 years	7 years 6 months
Restructuring Expense	119.0	20.3	9.5		47.7	47.7
IPR&D impairment charge				20.0
Intangible assets, amortization period	2015
Intangible assets, estimated amortization for 2013	4.2
Intangible assets, estimated amortization for 2014	0.1
Intangible assets, estimated amortization for 2015	$ 0.1

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 28, 2012

Summary of Significant Accounting Policies

1. Summary of Significant Accounting Policies

Nature of Business

We design, develop and support telecommunications networking products. We generate revenue principally through the sale of these products to communications service providers worldwide as both stand-alone network elements and as elements of integrated solutions. We also generate revenue by providing services to our customers.

Principles of Consolidation

Our consolidated financial statements include the accounts of Tellabs and its subsidiaries. We eliminate all intercompany accounts and transactions.

Use of Estimates

The preparation of the financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Cash Equivalents

We consider all highly liquid debt instruments purchased with original maturities of three months or less to be cash equivalents.

Investments in marketable securities

We account for investments in marketable securities at fair value, with the unrealized gain or loss, less deferred income taxes, included in Other Comprehensive (loss) income and shown as a separate component of stockholders’ equity. We base realized gains and losses on specific identification of the security sold. We review investments held with unrealized losses to determine if the loss is other-than-temporary. We evaluate near-term prospects of the security in relation to the severity and duration of the unrealized loss. We also assess our intent to sell the security, whether it is more likely than not that the security will be required to be sold before recovery, or the security is not expected to recover its entire amortized cost basis.

Fair Value of Financial Instruments

Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash and cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly. See discussion in Notes 5 and 6 regarding investments and derivatives, respectively.

Accounts Receivable Allowances

We base the reserve for allowances on an assessment of aged receivables and the collectability of customers’ accounts. We regularly review the allowance by considering factors such as customer financial strength, the age of accounts receivable balances, current economic conditions that may affect a customer’s ability to pay and historical experience. As specific balances are determined to be ultimately uncollectible, they are removed from accounts receivable.

Inventories and Suppliers

We determine inventory cost using the first-in, first-out method. We value inventory at the lower of cost or market, with market determined at the lower of current replacement cost or net realizable selling price. We determine the amount of inventory that is excess and obsolete and purchase commitments in excess of requirements using estimates of future demand for individual components of raw materials and finished goods.

We outsource the manufacturing of products to third-party suppliers. Although a limited number of suppliers are used to manufacture our products, we believe other suppliers could provide similar products on comparable terms. An inability of a supplier to provide product could cause a near-term reduction of revenue, which would affect operating results adversely.

Property, Plant and Equipment

We record property, plant and equipment at cost or fair value if acquired in a business combination, less accumulated depreciation and amortization. We compute depreciation using the straight-line method. Buildings are depreciated over 25 to 40 years; building improvements over 7 years; leasehold improvements over the lesser of the life of the lease or the useful life of the asset, currently 3 to 10 years; and equipment over 3 to 10 years. We evaluate property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be fully recoverable.

Equity-Based Compensation

We recognize compensation expense for employee services received in exchange for awards of equity instruments based upon the grant date fair value of those awards over the requisite service period for the respective award.

Income Taxes

Income tax expense is based on pretax financial income and the tax rates applicable to that income in the various jurisdictions in which we operate. Deferred tax liabilities and assets are recognized for the expected future tax consequences of events that have been reflected in the consolidated financial statements. Deferred tax liabilities and assets are determined based on the differences between the book and tax bases of particular assets and liabilities as well as tax credit and operating loss carry forwards using tax rates in effect for the years in which the differences are expected to reverse. A valuation allowance is provided to offset deferred tax assets if, based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Significant judgment is required in determining and evaluating our tax positions. We establish reserves when it is more likely than not that we will not realize the full benefit of such positions. We adjust these reserves in light of changing facts and circumstances.

Goodwill

Goodwill impairment is reviewed annually and when impairment indicators exist. Goodwill impairment reviews are conducted in two steps, the first of which is by comparing the segment’s net carrying value to its estimated fair value. The process of evaluating the potential impairment of goodwill is subjective because it requires the use of estimates and assumptions. We calculate the fair value of the segment using the discounted cash flow method and the market approach of valuation. The discounted cash flow method requires us to use estimates and judgments about the amounts and timing of future cash flows of the segment. Although we base cash flow forecasts on assumptions that are consistent with plans and estimates we use to manage the underlying operating segments, there is significant judgment in determining the cash flows attributable to these operating segments, including markets and market share, sales volumes and mix, research and development expenses, tax rates, capital spending, discount rate and working capital changes. The market approach is based on a comparison of the Company to comparable publicly traded firms in similar lines of business. The estimates and judgments used to determine comparable companies include such factors as size, growth, profitability, risk and return on investment.

Intangible Assets

Intangible assets are made up of customer relationships from an acquisition. These assets are amortized over their estimated useful lives and reviewed for impairment when indicators of impairment exist, such as loss of customer relationships, customer non-acceptance of products and underlying technology, and reduced product margins indicating declining operating performance or cash flows. The estimated useful lives of these assets are evaluated to determine if a change in an estimate is required. The remaining carrying value of the asset is amortized prospectively over the remaining adjusted useful life of the asset. The review for potential impairment and change in estimated useful lives requires us to use estimates and judgments of future cash flows, consistent with plans and estimates we use to manage related product cash flows.

Revenue Recognition

Determining the proper revenue recognition in our financial statements requires us to make judgments about the application of the accounting rules based on the facts and circumstances of each customer arrangement.

We recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price or fee is fixed or determinable, and collectability is reasonably assured.

Contracts and customer purchase orders are generally used to determine the existence of an arrangement. Shipping terms and related documents are used to verify delivery or performance.

The Company assesses whether the sales price is fixed or determinable based on payment terms and whether the sales price is subject to refund or adjustment. If the price is not fixed or determinable, revenue is recognized as payments become due from the customer.

Collectability is assessed based on the creditworthiness of the customer as determined by credit checks and the customer’s payment history to the Company. If collectability is not considered probable, revenue is not recognized until the payment is made.

The majority of revenue comes from product sales. We generally recognize revenue either upon shipment or upon delivery to the customer, depending on the contractual delivery terms.

Some customer agreements contain acceptance clauses that grant the customer the right to return or exchange products that do not conform to specifications. If we do not have sufficient historical evidence of customer acceptance, we recognize revenue when we receive written evidence of customer acceptance or the acceptance provisions lapse. When we have sufficient historical evidence that products meet the specifications, we recognize revenue upon shipment or delivery provided title and risk of loss have transferred at that time.

Some customer agreements grant the right to return or exchange product. We accrue for returns based on historical evidence of rates of return. We recognize revenue, net of potential returns, upon shipment or upon delivery of the product to the customer provided title and risk of loss have transferred at that time.

Some customer arrangements are in the form of distribution agreements, with contractual rights of return, promotional rebates, and other incentives and credits allowances. We recognize revenue net of estimated returns and rebates, which are calculated based on contractual provisions and historical evidence of returns activity.

We also recognize revenue from deployment services, support agreements, training and professional services. Deployment services revenue results from installation of products at customer sites. Installation services, which generally occur over a short time period, are not services required for the functionality of products, as customers do not have to purchase installation services from us, and may install products themselves, or hire third parties to perform the installation services. We recognize revenue for deployment services upon completion. We recognize revenue from support agreements ratably over the service period. We recognize training and professional services revenue upon completion.

Many customer arrangements include the right to invoice the customer for costs of shipping product to the customer’s location. In these cases, we record the amount included on the customer’s invoice for shipping costs as revenue. The cost of shipping products to customers is recorded as cost of revenue.

We record revenue net of any sales-related taxes that are imposed on a sale to our customers regardless of whether or not we bill the customer for such tax. We believe this approach results in financial statements that are more easily understood by investors.

Accounting for multiple element arrangements

When a sales arrangement contains multiple deliverables, such as product sales that include services to be performed after delivery of the product, or where we sell multiple products to a customer, we account for a deliverable (or a group of deliverables) separately if (1) the delivered item(s) has stand-alone value to the customer, and (2) if we have given the customer a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) or service(s) is probable and substantially in our control.

Arrangement consideration is allocated to all deliverables based on the relative selling price using one of three methods: vendor–specific objective evidence, third-party evidence or estimated selling price. We use vendor-specific objective evidence if available, third-party evidence if vendor-specific objective evidence is not available or estimated selling price if neither vendor-specific objective evidence or third-party evidence is available.

Revenue recognition for elements delivered will be limited to the amount that is not contingent on the future delivery of products and/or services, future performance obligations or subject to customer-specified return or refund privileges.

We determine vendor-specific objective evidence of an item based on our selling price for a deliverable when sold on a stand-alone basis. Third-party evidence is determined based on a vendor’s selling price for a comparable product or service on a stand-alone basis, if available. The best estimate of selling price is established based on internal factors including pricing practices, market conditions and product lifecycles.

If we determine that the software products bundled with tangible products function together to deliver the product’s essential functionality, we exclude them from the scope of software revenue recognition guidance.

Legal Costs

We expense legal costs associated with litigation defense as incurred.

Net Earnings per Share

We base net earnings per share on the weighted average number of issued and outstanding common shares (basic) and the weighted average issued and outstanding common shares adjusted for assumed exercises of dilutive stock options, unvested restricted stock and unvested performance stock units (diluted). We base net earnings per share in periods of a net loss solely on basic weighted average number of common shares outstanding.

Foreign Currency Translation

We generally measure the financial statements of foreign subsidiaries using the local currency as the functional currency. In such cases, we translate assets and liabilities at exchange rates in effect at the balance sheet date, and we translate revenue and expenses at weighted average exchange rates during the year. We record the gain or loss from translating a subsidiary’s stockholders’ equity into U.S. dollars as foreign currency translation adjustments in Accumulated other comprehensive income.

Foreign Currency Transactions

We recognize foreign currency transaction gains and losses resulting from changes in exchange rates due to the settlement of monetary assets and liabilities in a currency other than the subsidiary’s functional currency in Other income (expense), net.

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Product Warranties - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2012 M Y D
Product Warranty Liability [Line Items]
Basic limited warranty, minimum range in days	90
Basic limited warranty, maximum range in years	6
Number of months of estimated warranty included in current liabilities	12
Number of months over which warranty liability is classified as a long-term liability	12

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Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 28, 2012
Summary Of Significant Accounting Policies [Line Items]
Measurement period for cash and cash equivalents	Three months or less
Building | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	25 years
Building | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	40 years
Building Improvements
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	7 years
Leasehold Improvements | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	3 years
Leasehold Improvements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	10 years
Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	3 years
Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Property, plant and equipment, useful life in years	10 years

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Restructuring and Other Charges (Tables)

12 Months Ended

Dec. 28, 2012

Summary Of Restructuring And Other Charges

The following table summarizes restructuring and other charges recorded for the plans mentioned above, as well as adjustments for prior restructurings:

	2012		2011		2010
Severance and other termination benefits	$	32.9	$	15.9	$	6.9
Facility and other exit costs		37.3		3.8		2.6
Accelerated amortization of intangible assets		47.7		—		—
Other obligations		1.1		0.6		—
Total restructuring and other charges	$	119.0	$	20.3	$	9.5

Summary Of Restructuring And Other Charges Activity By Segment

The following table summarizes our restructuring and other charges activity by segment during 2012 and 2011 and the status at year-end:

	Balance at 12/30/11		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/28/12
2012 Restructuring Plans
Optical	$	—	$	7.0		$	(2.2	)	$	(0.9	)	$	3.9
Data		—		103.8			(18.6	)		(76.6	)		8.6
Access		—		2.4			(0.7	)		(0.2	)		1.5
Services		—		5.0			(2.2	)		—			2.8
Subtotal 2012 Restructuring Plans		—		118.2			(23.7	)		(77.7	)		16.8
2011 Restructuring Plan
Optical		4.4		1.7			(5.1	)		(0.6	)		0.4
Data		5.5		—			(3.4	)		(0.2	)		1.9
Access		1.1		0.1			(0.9	)		—			0.3
Services		1.6		(0.3	)		(1.3	)		—			—
Subtotal 2011 Restructuring Plan		12.6		1.5			(10.7	)		(0.8	)		2.6
Previous Restructuring Plans
Optical		0.4		(0.1	)		(0.1	)		—			0.2
Data		1.9		—			(0.7	)		—			1.2
Access		2.6		(0.6	)		(0.9	)		—			1.1
Services		0.2		—			(0.2	)		—			—
Subtotal Previous Restructuring Plans		5.1		(0.7	)		(1.9	)		—			2.5
Total All Restructuring Plans	$	17.7	$	119.0		$	(36.3	)	$	(78.5	)	$	21.9

	Balance at 12/31/10		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/30/11
2011 Restructuring Plan
Optical	$	—	$	6.8		$	(1.5	)	$	(0.9	)	$	4.4
Data		—		7.2			(1.3	)		(0.4	)		5.5
Access		—		1.7			(0.5	)		(0.1	)		1.1
Services		—		4.0			(2.3	)		(0.1	)		1.6
Subtotal 2011 Restructuring Plan		—		19.7			(5.6	)		(1.5	)		12.6
2010 Restructuring Plans
Optical		1.1		0.2			(1.2	)		—			0.1
Data		0.8		0.4			(1.1	)		—			0.1
Access		0.5		—			(0.4	)		—			0.1
Services		—		0.2			(0.2	)		—			—
Subtotal 2010 Restructuring Plans		2.4		0.8			(2.9	)		—			0.3
Previous Restructuring Plans
Optical		1.8		(1.1	)		(0.4	)		—			0.3
Data		2.9		(0.4	)		(0.6	)		(0.1	)		1.8
Access		3.2		0.8			(1.4	)		(0.1	)		2.5
Services		0.5		0.5			(0.8	)		—			0.2
Subtotal Previous Restructuring Plans		8.4		(0.2	)		(3.2	)		(0.2	)		4.8
Total All Restructuring Plans	$	10.8	$	20.3		$	(11.7	)	$	(1.7	)	$	17.7

¹ Other activities include accelerated amortization related to abandoned intangible assets, accelerated depreciation of property, plant and equipment to be disposed, the effects of currency translation as well as other changes that do not flow through restructuring expense.

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 28, 2012

Nature of Business

Nature of Business

We design, develop and support telecommunications networking products. We generate revenue principally through the sale of these products to communications service providers worldwide as both stand-alone network elements and as elements of integrated solutions. We also generate revenue by providing services to our customers.

Principles of Consolidation

Principles of Consolidation

Our consolidated financial statements include the accounts of Tellabs and its subsidiaries. We eliminate all intercompany accounts and transactions.

Use of Estimates

Use of Estimates

The preparation of the financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Cash Equivalents

Cash Equivalents

We consider all highly liquid debt instruments purchased with original maturities of three months or less to be cash equivalents.

Investments in marketable securities

Investments in marketable securities

We account for investments in marketable securities at fair value, with the unrealized gain or loss, less deferred income taxes, included in Other Comprehensive (loss) income and shown as a separate component of stockholders’ equity. We base realized gains and losses on specific identification of the security sold. We review investments held with unrealized losses to determine if the loss is other-than-temporary. We evaluate near-term prospects of the security in relation to the severity and duration of the unrealized loss. We also assess our intent to sell the security, whether it is more likely than not that the security will be required to be sold before recovery, or the security is not expected to recover its entire amortized cost basis.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

Our financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash and cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly. See discussion in Notes 5 and 6 regarding investments and derivatives, respectively.

Accounts Receivable Allowances

Accounts Receivable Allowances

We base the reserve for allowances on an assessment of aged receivables and the collectability of customers’ accounts. We regularly review the allowance by considering factors such as customer financial strength, the age of accounts receivable balances, current economic conditions that may affect a customer’s ability to pay and historical experience. As specific balances are determined to be ultimately uncollectible, they are removed from accounts receivable.

Inventories and Suppliers

Inventories and Suppliers

We determine inventory cost using the first-in, first-out method. We value inventory at the lower of cost or market, with market determined at the lower of current replacement cost or net realizable selling price. We determine the amount of inventory that is excess and obsolete and purchase commitments in excess of requirements using estimates of future demand for individual components of raw materials and finished goods.

We outsource the manufacturing of products to third-party suppliers. Although a limited number of suppliers are used to manufacture our products, we believe other suppliers could provide similar products on comparable terms. An inability of a supplier to provide product could cause a near-term reduction of revenue, which would affect operating results adversely.

Property, Plant and Equipment

Property, Plant and Equipment

We record property, plant and equipment at cost or fair value if acquired in a business combination, less accumulated depreciation and amortization. We compute depreciation using the straight-line method. Buildings are depreciated over 25 to 40 years; building improvements over 7 years; leasehold improvements over the lesser of the life of the lease or the useful life of the asset, currently 3 to 10 years; and equipment over 3 to 10 years. We evaluate property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be fully recoverable.

Equity-Based Compensation

Equity-Based Compensation

We recognize compensation expense for employee services received in exchange for awards of equity instruments based upon the grant date fair value of those awards over the requisite service period for the respective award.

Income Taxes

Income Taxes

Income tax expense is based on pretax financial income and the tax rates applicable to that income in the various jurisdictions in which we operate. Deferred tax liabilities and assets are recognized for the expected future tax consequences of events that have been reflected in the consolidated financial statements. Deferred tax liabilities and assets are determined based on the differences between the book and tax bases of particular assets and liabilities as well as tax credit and operating loss carry forwards using tax rates in effect for the years in which the differences are expected to reverse. A valuation allowance is provided to offset deferred tax assets if, based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Significant judgment is required in determining and evaluating our tax positions. We establish reserves when it is more likely than not that we will not realize the full benefit of such positions. We adjust these reserves in light of changing facts and circumstances.

Goodwill

Goodwill

Goodwill impairment is reviewed annually and when impairment indicators exist. Goodwill impairment reviews are conducted in two steps, the first of which is by comparing the segment’s net carrying value to its estimated fair value. The process of evaluating the potential impairment of goodwill is subjective because it requires the use of estimates and assumptions. We calculate the fair value of the segment using the discounted cash flow method and the market approach of valuation. The discounted cash flow method requires us to use estimates and judgments about the amounts and timing of future cash flows of the segment. Although we base cash flow forecasts on assumptions that are consistent with plans and estimates we use to manage the underlying operating segments, there is significant judgment in determining the cash flows attributable to these operating segments, including markets and market share, sales volumes and mix, research and development expenses, tax rates, capital spending, discount rate and working capital changes. The market approach is based on a comparison of the Company to comparable publicly traded firms in similar lines of business. The estimates and judgments used to determine comparable companies include such factors as size, growth, profitability, risk and return on investment.

Intangible Assets

Intangible Assets

Intangible assets are made up of customer relationships from an acquisition. These assets are amortized over their estimated useful lives and reviewed for impairment when indicators of impairment exist, such as loss of customer relationships, customer non-acceptance of products and underlying technology, and reduced product margins indicating declining operating performance or cash flows. The estimated useful lives of these assets are evaluated to determine if a change in an estimate is required. The remaining carrying value of the asset is amortized prospectively over the remaining adjusted useful life of the asset. The review for potential impairment and change in estimated useful lives requires us to use estimates and judgments of future cash flows, consistent with plans and estimates we use to manage related product cash flows.

Revenue Recognition

Revenue Recognition

Determining the proper revenue recognition in our financial statements requires us to make judgments about the application of the accounting rules based on the facts and circumstances of each customer arrangement.

We recognize revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price or fee is fixed or determinable, and collectability is reasonably assured.

Contracts and customer purchase orders are generally used to determine the existence of an arrangement. Shipping terms and related documents are used to verify delivery or performance.

The Company assesses whether the sales price is fixed or determinable based on payment terms and whether the sales price is subject to refund or adjustment. If the price is not fixed or determinable, revenue is recognized as payments become due from the customer.

Collectability is assessed based on the creditworthiness of the customer as determined by credit checks and the customer’s payment history to the Company. If collectability is not considered probable, revenue is not recognized until the payment is made.

The majority of revenue comes from product sales. We generally recognize revenue either upon shipment or upon delivery to the customer, depending on the contractual delivery terms.

Some customer agreements contain acceptance clauses that grant the customer the right to return or exchange products that do not conform to specifications. If we do not have sufficient historical evidence of customer acceptance, we recognize revenue when we receive written evidence of customer acceptance or the acceptance provisions lapse. When we have sufficient historical evidence that products meet the specifications, we recognize revenue upon shipment or delivery provided title and risk of loss have transferred at that time.

Some customer agreements grant the right to return or exchange product. We accrue for returns based on historical evidence of rates of return. We recognize revenue, net of potential returns, upon shipment or upon delivery of the product to the customer provided title and risk of loss have transferred at that time.

Some customer arrangements are in the form of distribution agreements, with contractual rights of return, promotional rebates, and other incentives and credits allowances. We recognize revenue net of estimated returns and rebates, which are calculated based on contractual provisions and historical evidence of returns activity.

We also recognize revenue from deployment services, support agreements, training and professional services. Deployment services revenue results from installation of products at customer sites. Installation services, which generally occur over a short time period, are not services required for the functionality of products, as customers do not have to purchase installation services from us, and may install products themselves, or hire third parties to perform the installation services. We recognize revenue for deployment services upon completion. We recognize revenue from support agreements ratably over the service period. We recognize training and professional services revenue upon completion.

Many customer arrangements include the right to invoice the customer for costs of shipping product to the customer’s location. In these cases, we record the amount included on the customer’s invoice for shipping costs as revenue. The cost of shipping products to customers is recorded as cost of revenue.

We record revenue net of any sales-related taxes that are imposed on a sale to our customers regardless of whether or not we bill the customer for such tax. We believe this approach results in financial statements that are more easily understood by investors.

Accounting for multiple element arrangements

When a sales arrangement contains multiple deliverables, such as product sales that include services to be performed after delivery of the product, or where we sell multiple products to a customer, we account for a deliverable (or a group of deliverables) separately if (1) the delivered item(s) has stand-alone value to the customer, and (2) if we have given the customer a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) or service(s) is probable and substantially in our control.

Arrangement consideration is allocated to all deliverables based on the relative selling price using one of three methods: vendor–specific objective evidence, third-party evidence or estimated selling price. We use vendor-specific objective evidence if available, third-party evidence if vendor-specific objective evidence is not available or estimated selling price if neither vendor-specific objective evidence or third-party evidence is available.

Revenue recognition for elements delivered will be limited to the amount that is not contingent on the future delivery of products and/or services, future performance obligations or subject to customer-specified return or refund privileges.

We determine vendor-specific objective evidence of an item based on our selling price for a deliverable when sold on a stand-alone basis. Third-party evidence is determined based on a vendor’s selling price for a comparable product or service on a stand-alone basis, if available. The best estimate of selling price is established based on internal factors including pricing practices, market conditions and product lifecycles.

If we determine that the software products bundled with tangible products function together to deliver the product’s essential functionality, we exclude them from the scope of software revenue recognition guidance.

Legal Costs

Legal Costs

We expense legal costs associated with litigation defense as incurred.

Net Earnings per Share

Net Earnings per Share

We base net earnings per share on the weighted average number of issued and outstanding common shares (basic) and the weighted average issued and outstanding common shares adjusted for assumed exercises of dilutive stock options, unvested restricted stock and unvested performance stock units (diluted). We base net earnings per share in periods of a net loss solely on basic weighted average number of common shares outstanding.

Foreign Currency Translation and Transactions

Foreign Currency Translation

We generally measure the financial statements of foreign subsidiaries using the local currency as the functional currency. In such cases, we translate assets and liabilities at exchange rates in effect at the balance sheet date, and we translate revenue and expenses at weighted average exchange rates during the year. We record the gain or loss from translating a subsidiary’s stockholders’ equity into U.S. dollars as foreign currency translation adjustments in Accumulated other comprehensive income.

Foreign Currency Transactions

We recognize foreign currency transaction gains and losses resulting from changes in exchange rates due to the settlement of monetary assets and liabilities in a currency other than the subsidiary’s functional currency in Other income (expense), net.

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Valuation and Qualifying Accounts and Reserves (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1.3	$ 1.3	$ 1.4
Net Additions (Reductions) Charged to Costs and Expenses
Deductions
Currency Translation Adjustments			(0.1)
Balance at End of Year	$ 1.3	$ 1.3	$ 1.3

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Gross Realized Gains and Losses Related to Fixed Income Investments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	$ 4.4		$ 3.8		$ 14.9
Gross realized losses	(1.3)	[1]	(4.9)	[1]	(2.7)	[1]
Total	$ 3.1		$ (1.1)		$ 12.2

[1] Includes other-than-temporary impairments of $1.2 million for the year ended December 30, 2011.

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Restructuring and Other Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended																																						3 Months Ended	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Dec. 28, 2012 October 2012 Restructuring Plan Employee	Dec. 28, 2012 October 2012 Restructuring Plan Optical Segment	Dec. 28, 2012 October 2012 Restructuring Plan Data segment	Dec. 28, 2012 October 2012 Restructuring Plan Access segment	Dec. 28, 2012 October 2012 Restructuring Plan Services segment	Dec. 28, 2012 January 2012 Restructuring Plan Employee	Dec. 28, 2012 January 2012 Restructuring Plan Optical Segment	Dec. 28, 2012 January 2012 Restructuring Plan Data segment	Dec. 28, 2012 January 2012 Restructuring Plan Access segment	Dec. 28, 2012 January 2012 Restructuring Plan Services segment	Dec. 28, 2012 July 2011 Restructuring Plan	Dec. 28, 2012 July 2011 Restructuring Plan Optical Segment	Dec. 28, 2012 July 2011 Restructuring Plan Data segment	Dec. 28, 2012 July 2011 Restructuring Plan Access segment	Dec. 28, 2012 July 2011 Restructuring Plan Services segment	Dec. 28, 2012 January 2010 Restructuring Plan	Dec. 28, 2012 January 2010 Restructuring Plan Optical Segment	Dec. 28, 2012 January 2010 Restructuring Plan Data segment	Dec. 28, 2012 January 2010 Restructuring Plan Access segment	Dec. 28, 2012 January 2010 Restructuring Plan Services segment	Dec. 28, 2012 Severance and other termination benefits	Dec. 30, 2011 Severance and other termination benefits	Dec. 31, 2010 Severance and other termination benefits	Dec. 28, 2012 Severance and other termination benefits October 2012 Restructuring Plan	Dec. 28, 2012 Severance and other termination benefits January 2012 Restructuring Plan	Dec. 28, 2012 Severance and other termination benefits July 2011 Restructuring Plan	Dec. 28, 2012 Severance and other termination benefits January 2010 Restructuring Plan	Dec. 28, 2012 Facility- And Asset-Related Charges	Dec. 30, 2011 Facility- And Asset-Related Charges	Dec. 31, 2010 Facility- And Asset-Related Charges	Dec. 28, 2012 Facility- And Asset-Related Charges October 2012 Restructuring Plan	Dec. 28, 2012 Facility- And Asset-Related Charges January 2012 Restructuring Plan	Dec. 28, 2012 Facility- And Asset-Related Charges July 2011 Restructuring Plan	Dec. 28, 2012 Facility- And Asset-Related Charges January 2010 Restructuring Plan	Dec. 28, 2012 Facility- And Asset-Related Charges Previous Restructuring Plans	Mar. 30, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Accelerated amortization of intangible assets January 2012 Restructuring Plan	Dec. 28, 2012 Other obligations	Dec. 30, 2011 Other obligations	Dec. 28, 2012 Other obligations January 2012 Restructuring Plan	Dec. 28, 2012 Other Obligation July 2011 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected pretax charges																											$ 9	$ 23						$ 2	$ 38						$ 48
Expected workforce reductions				200					500
Restructuring Expense	119.0	20.3	9.5	9.4					108.8					1.5										32.9	15.9	6.9	9.2	23.2	0.6		37.3	3.8	2.6	0.2	36.7	0.9		0.6	47.7	47.7	47.7	1.1	0.6	1.2
Cumulative pretax restructuring charges incurred to date					2.6	3.1	0.9	2.8		4.4	100.7	1.5	2.2	21.3	8.6	7.2	1.8	3.7	9.7	3.6	5.3	0.5	0.3						15.2	7.0						5.5	2.7								0.6
Expected total cash payments				9.7					30.6					18.9
Cash payments	36.3	11.7		0.8
Cumulative cash payments									22.9					16.3					7.2
Restructuring credit																														$ 0.1
Expiration year of lease obligations	2017
Expected date of last severance payment	2015

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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 28, 2012

Allocation of Goodwill and Goodwill Activity

	12/30/11
	Broadband			Services			Total
Beginning balance	$	82.7		$	122.2		$	204.9
Reductions		(82.7	)		—			(82.7	)
Currency translation adjustments		—			(0.2	)		(0.2	)
Ending balance	$	—		$	122.0		$	122.0

Gross Carry Amount and Accumulated Amortization of Intangible Assets Subject to Amortization

The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows:

	12/28/12
	Gross Assets		Accumulated Amortization			Net
Developed technology	$	126.1	$	(125.8	)	$	0.3
Customer relationships		30.9		(26.8	)		4.1
Total	$	157.0	$	(152.6	)	$	4.4

	12/30/11
	Gross Assets			Accumulated Amortization			Net
Developed technology	$	212.8		$	(169.1	)	$	43.7
Customer relationships/backlog		35.2			(23.7	)		11.5
Trade names/trademarks		0.2			(0.2	)		—
Leasehold improvements 1		(2.7	)		2.3			(0.4	)
Non-compete arrangements		13.1			(10.8	)		2.3
Total	$	258.6		$	(201.5	)	$	57.1

¹  Leasehold improvements as of December 30, 2011, reflects a net reclass of $0.5 million to Restructuring and other charges due to the reduction of a facility.

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 28, 2012

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis are:

	Fair Value Measurements at December 28, 2012
	Balance at 12/28/12		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	31.1	$	31.1	$	—	$	—
Corporate debt obligations		9.6		—		9.6		—
Mortgaged backed debt obligations guaranteed by GNMA		55.5		—		55.5		—
Certificates of deposit guaranteed by FDIC		1.2		—		1.2		—
Foreign government debt obligations		161.1		—		161.1		—
Foreign corporate debt obligations guaranteed by foreign governments		122.2		—		122.2		—
Subtotal		380.7		31.1		349.6		—
Other marketable securities		195.1		195.1		—		—
Total assets	$	575.8	$	226.2	$	349.6	$	—
Liabilities
Loan related to other marketable securities	$	195.1	$	195.1	$	—	$	—
Derivative financial instruments		0.1		—		0.1		—
Total liabilities	$	195.2	$	195.1	$	0.1	$	—

	Fair Value Measurements at December 30, 2011
	Balance at 12/30/11		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	195.7	$	195.7	$	—	$	—
Corporate debt obligations guaranteed by FDIC		66.8		—		66.8		—
Corporate debt obligations		201.5		—		201.5		—
Mortgaged backed debt obligations guaranteed by GNMA		91.2		—		91.2		—
Certificates of deposit guaranteed by FDIC		1.5		—		1.5		—
Foreign government debt obligations		223.0		—		223.0		—
Foreign corporate debt obligations guaranteed by foreign governments		64.2		—		64.2		—
Subtotal		843.9		195.7		648.2		—
Other marketable securities		190.9		190.9		—		—
Derivative financial instruments		0.2		—		0.2		—
Total assets	$	1,035.0	$	386.6	$	648.4	$	—
Liabilities
Loan related to other marketable securities	$	190.9	$	190.9	$	—	$	—
Derivative financial instruments		0.2		—		0.2		—
Total liabilities	$	191.1	$	190.9	$	0.2	$	—

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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Operating Activities
Net (loss) earnings	$ (171.7)	$ (188.4)	$ 155.6
Adjustments to reconcile net (loss) earnings to net cash provided by (used for) operating activities:
Depreciation and amortization	50.0	76.2	77.3
Loss on disposal of property, plant and equipment	1.5	0.7	0.3
Equity-based compensation	19.8	24.6	27.0
Deferred income taxes	5.5	(0.8)	18.1
Restructuring and other charges	119.0	20.3	9.5
Net gain on investments in marketable securities	(3.1)		(12.2)
Goodwill and IPR&D impairment		102.7
Other-than-temporary impairment charges on investments		2.2	3.8
Excess tax benefits from equity-based compensation		(0.2)	(1.6)
Net changes in assets and liabilities:
Accounts receivable	72.9	15.9	(17.9)
Inventories	41.6	16.9	(35.5)
Miscellaneous receivables and other current assets	19.6	(7.6)	10.6
Other assets	4.8	(4.6)	(4.1)
Accounts payable	(40.5)	(23.1)	52.7
Restructuring and other charges	(36.3)	(11.7)	(13.0)
Deferred revenue	(20.2)	(2.1)	11.9
Other accrued liabilities	(9.9)	(59.6)	25.6
Income taxes	(3.7)	(7.4)	(16.8)
Other long-term liabilities	(4.2)	(3.1)	(2.5)
Net Cash Provided by (Used for) Operating Activities	45.1	(49.1)	288.8
Investing Activities
Capital expenditures	(31.4)	(65.2)	(55.6)
Proceeds on disposals of property, plant and equipment		0.3	0.1
Payments for purchases of investments	(475.6)	(811.5)	(2,217.7)
Proceeds from sales and maturities of investments	950.0	888.2	2,245.1
Net Cash Provided by (Used for) Investing Activities	443.0	11.8	(28.1)
Financing Activities
Proceeds from short-term borrowings		1.3
Payments of short-term borrowings		(1.3)
Proceeds from issuance of common stock under stock plans	0.1	0.6	8.0
Repurchase of common stock	(3.8)	(5.1)	(184.2)
Excess tax benefits from equity-based compensation		0.2	1.6
Dividends paid	(396.9)	(29.1)	(30.3)
Net Cash Used for Financing Activities	(400.6)	(33.4)	(204.9)
Effect of Exchange Rate Changes on Cash	3.5	(5.4)	(1.0)
Net Increase (Decrease) in Cash and Cash Equivalents	91.0	(76.1)	54.8
Cash and Cash Equivalents-Beginning of Year	132.7	208.8	154.0
Cash and Cash Equivalents-End of Year	223.7	132.7	208.8
Other Information
Interest paid	1.2	1.3	1.7
Income taxes paid	$ 4.3	$ 6.1	$ 23.3

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Investments (Tables)

12 Months Ended

Dec. 28, 2012

Available-For-Sale Marketable Securities

At December 28, 2012, and December 30, 2011, available-for-sale marketable securities consisted of the following:

	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
December 28, 2012
U.S. government debt obligations	$	31.1	$	—	$	—		$	31.1
Corporate debt obligations		9.5		0.1		—			9.6
Mortgaged backed debt obligations guaranteed by GNMA		54.9		0.6		—			55.5
Certificates of deposit guaranteed by FDIC		1.2		—		—			1.2
Foreign government debt obligations		159.3		1.8		—			161.1
Foreign corporate debt obligations guaranteed by foreign governments		121.5		0.7		—			122.2
Total	$	377.5	$	3.2	$	—		$	380.7
December 30, 2011
U.S. government debt obligations	$	195.2	$	0.5	$	—		$	195.7
Corporate debt obligations guaranteed by FDIC		66.6		0.2		—			66.8
Corporate debt obligations		201.4		0.8		(0.7	)		201.5
Mortgaged backed debt obligations guaranteed by GNMA		90.9		0.4		(0.1	)		91.2
Certificates of deposit guaranteed by FDIC		1.5		—		—			1.5
Foreign government debt obligations		221.5		1.5		—			223.0
Foreign corporate debt obligations guaranteed by foreign governments		64.1		0.2		(0.1	)		64.2
Total	$	841.2	$	3.6	$	(0.9	)	$	843.9

Maturities of Available-For-Sale Marketable Securities

The following table summarizes the maturities of our available-for-sale marketable securities at December 28, 2012:

	Amortized Cost		Fair Value
Less than 12 months	$	117.1	$	117.4
Due in 1 to 5 years		205.5		207.8
Due after 5 years		54.9		55.5
Total	$	377.5	$	380.7

Investments in Marketable Securities with Unrealized Losses

Investments in marketable securities with unrealized losses at December 30, 2011, were as follows:

	Unrealized Loss					Unrealized Loss				Fair Value		Total Unrealized Loss
	Less than 12 months					Greater than 12 months
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
December 30, 2011
Corporate debt obligations	$	81.0	$	(0.7	)	$	—	$	—	$	81.0	$	(0.7	)
Mortgaged backed debt obligations guaranteed by GNMA		31.4		(0.1	)		—		—		31.4		(0.1	)
Foreign government debt obligations guaranteed by foreign governments		24.1		(0.1	)		—		—		24.1		(0.1	)
Total	$	136.5	$	(0.9	)	$	—	$	—	$	136.5	$	(0.9	)

Gross Realized Gains and Losses Related to Fixed Income Investments

The following table presents gross realized gains and losses related to fixed income investments:

	2012			2011			2010
Gross realized gains	$	4.4		$	3.8		$	14.9
Gross realized losses 1		(1.3	)		(4.9	)		(2.7	)
Total	$	3.1		$	(1.1	)	$	12.2

¹  Includes other-than-temporary impairments of $1.2 million for the year ended December 30, 2011.

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Reconciliation of Reported Effective Income Tax Rate to Domestic Federal Income Tax Rate (Detail)	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Schedule Of Effective Tax Rates Line Items
Statutory Federal income tax rate	35.00%		35.00%		35.00%
Valuation allowance on net domestic deferred tax assets	(46.10%)		(20.40%)		(11.60%)
State income tax, net of federal benefits	(0.80%)	[1]	3.00%	[1]	(4.90%)	[1]
Foreign earnings taxed at different rates	2.60%		(2.20%)		1.80%
Research and development credits	0.10%		4.20%		(1.40%)
Nondeductible equity-based compensation expense	(0.40%)		(0.40%)		0.30%
Interest related to prior year tax matters	(0.20%)		(0.20%)		0.30%
Tax exempt interest					(0.10%)
Goodwill impairment			(14.80%)
Other, net	(5.80%)		(0.80%)		(0.60%)
Effective income tax rate	(15.60%)		3.40%		18.80%

[1] In 2010, state income tax, net of federal benefits, reflects a benefit of $9.4 million, including interest, related to the reversal of reserves no longer required due to a lapse in the statute of limitations.

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Operating Lease Commitments (Tables)

12 Months Ended

Dec. 28, 2012

Operating Leases of Lessee

As of December 28, 2012, future minimum lease commitments under non-cancelable leases are as follows:

2013	$	12.6
2014		9.9
2015		8.0
2016		6.4
2017		2.0
2018 and thereafter		1.5
Total minimum lease payments	$	40.4

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Maturities of Available for Sale Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Due in less than 12 months, amortized cost	$ 117.1
Due in 1 to 5 years, amortized cost	205.5
Due after 5 years, amortized cost	54.9
Total, amortized cost	377.5	841.2
Due in less than 12 months, fair value	117.4
Due in 1 to 5 years, fair value	207.8
Due after 5 years, fair value	55.5
Fair Value	$ 380.7	$ 843.9

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Schedule of Total Equity Based Compensation Expense by Type (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 19.8	$ 24.6	$ 27.0
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	4.1	4.8	5.1
Cash-settled SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	(0.1)	(0.3)	0.2
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	11.4	16.9	17.0
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 4.4	$ 3.2	$ 4.7

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Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Revenue
Products	$ 854.0		$ 1,062.4		$ 1,400.0
Services	198.6		223.3		242.3
Total revenue	1,052.6		1,285.7		1,642.3
Cost of Revenue
Products	515.4		627.3		689.3
Services	130.3		150.1		163.4
Total cost of revenue	645.7		777.4		852.7
Gross Profit	406.9		508.3		789.6
Operating Expenses
Research and development	238.7		324.1		299.7
Sales and marketing	126.4		163.0		179.3
General and administrative	74.1		80.9		100.4
Intangible asset amortization	5.4		20.2		27.0
Restructuring and other charges	119.0		20.3		9.5
Goodwill and IPR&D impairment			102.7
Total operating expenses	563.6		711.2		615.9
Operating (Loss) Earnings	(156.7)		(202.9)		173.7
Other Income
Interest income, net	7.3		12.1		12.6
Other income (expense), net	0.8		(4.2)		5.2
Total other income	8.1		7.9		17.8
(Loss) Earnings Before Income Tax	(148.6)		(195.0)		191.5
Income tax (expense) benefit	(23.1)		6.6		(35.9)
Net (Loss) Earnings	$ (171.7)		$ (188.4)		$ 155.6
Weighted Average Shares Outstanding
Basic	367.0		364.5		378.1
Diluted	367.0		364.5		382.7
Net (Loss) Earnings Per Share
Basic	$ (0.47)		$ (0.52)		$ 0.41
Diluted	$ (0.47)	[1]	$ (0.52)	[1]	$ 0.41	[1]

[1] Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

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Summary of Restructuring and Other Charges (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended									3 Months Ended	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Dec. 28, 2012 Severance and other termination benefits	Dec. 30, 2011 Severance and other termination benefits	Dec. 31, 2010 Severance and other termination benefits	Dec. 28, 2012 Facility- And Asset-Related Charges	Dec. 30, 2011 Facility- And Asset-Related Charges	Dec. 31, 2010 Facility- And Asset-Related Charges	Mar. 30, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Accelerated amortization of intangible assets	Dec. 28, 2012 Other obligations	Dec. 30, 2011 Other obligations
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 119.0	$ 20.3	$ 9.5	$ 32.9	$ 15.9	$ 6.9	$ 37.3	$ 3.8	$ 2.6	$ 47.7	$ 47.7	$ 1.1	$ 0.6

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Computation of Net Loss Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 28, 2012		Sep. 28, 2012		Jun. 29, 2012		Mar. 30, 2012		Dec. 30, 2011		Sep. 30, 2011		Jul. 01, 2011		Apr. 01, 2011		Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Earnings Per Share Disclosure [Line Items]
Net (loss) earnings	$ (23.3)		$ (3.9)		$ (4.7)		$ (139.8)		$ (4.9)		$ (130.1)		$ (29.3)		$ (24.1)		$ (171.7)		$ (188.4)		$ 155.6
Denominator for basic net (loss) earnings per share - weighted average shares outstanding																	367.0		364.5		378.1
Employee stock options and restricted and performance stock awards																					4.6
Denominator for diluted net (loss) earnings per share - adjusted weighted average shares outstanding and assumed conversions																	367.0		364.5		382.7
Net (loss) earnings per share, basic	$ (0.06)	[1]	$ (0.01)	[1]	$ (0.01)	[1]	$ (0.38)	[1]	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.47)		$ (0.52)		$ 0.41
Net (loss) earnings per share, diluted	$ (0.06)	[1]	$ (0.01)	[1]	$ (0.01)	[1]	$ (0.38)	[1]	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.47)	[2]	$ (0.52)	[2]	$ 0.41	[2]
Anti-dilutive employee equity-based awards, excluded (in shares)																	19.3	[3]	23.2	[3]	18.5	[3]

[1] The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

[2] Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

[3] We exclude certain employee equity-based awards from the weighted average shares outstanding computation because the exercise price was greater than the average market price of the common shares; therefore, the effect would have been anti-dilutive.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Accounts receivable, allowances	$ 1.3	$ 1.3
Preferred stock, authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, authorized	1,000,000,000	1,000,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	508,846,484	505,238,503
Treasury stock, shares	141,284,352	140,250,476

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Operating Lease Commitments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Schedule of Operating Leases [Line Items]
Total rental expense	$ 13.1	$ 17.4	$ 12.7

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Fair Value of Derivative Instruments in Consolidated Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Asset Derivatives Reported In Miscellaneous Receivables And Other Current Assets
Derivatives, Fair Value [Line Items]
Net investment hedges, Assets		$ 0.1
Balance sheet hedges (Non-designated hedges), Assets		0.1
Total derivative, Assets		0.2
Liability Derivatives Reported In Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Net investment hedges, Liabilities
Balance sheet hedges (Non-designated hedges), Liabilities	0.1	0.2
Total derivative, Liabilities		$ 0.2

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Subsequent Event - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 31, 2013
Subsequent Event
Subsequent Event [Line Items]
Expected pre-tax charge	$ 38
Expected total cash payment	25
Severance and other termination benefits
Subsequent Event [Line Items]
Expected pre-tax charge	18
Expected workforce reduction, number of employees	300
Facility- And Asset-Related Charges
Subsequent Event [Line Items]
Expected pre-tax charge	16
Software And Other
Subsequent Event [Line Items]
Expected pre-tax charge	$ 4

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Equity-Based Compensation (Tables)

12 Months Ended

Dec. 28, 2012

Assumptions used to Calculate Weighted Average Fair Value of Stock Option Grants

The following table summarizes the assumptions used to compute the weighted average fair value of stock option grants:

	2012			2011			2010
Expected volatility		43.3	%		46.5	%		42.0	%
Risk-free interest rate		0.9	%		2.0	%		2.1	%
Expected term (in years)		5.3			5.3			5.3
Expected dividend yield		2.0	%		1.5	%		1.0	%

Stock Option Activity

The following is a summary of stock option activity during 2012, and status at December 28, 2012:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in millions)
Outstanding – beginning of year		20,719,482		$	7.68
Granted		2,102,207		$	3.95
Exercised		(150,593	)	$	0.63
Forfeited/expired		(5,957,941	)	$	7.05
Outstanding – end of year		16,713,155		$	7.50		3.6	$	—
Exercisable – end of year		14,282,666		$	7.96		2.7	$	—
Options vested or expected to vest		16,566,555		$	7.53		3.6	$	—

Cash-Settled Stock Appreciation Rights Activity

The following is a summary of cash-settled SARs activity in 2012:

	Shares			Weighted Average Exercise Price
Outstanding – beginning of year		492,131		$	6.81
Granted		16,200		$	3.98
Forfeited/expired		(52,136	)	$	7.15
Outstanding – end of year		456,195		$	6.67

Restricted Stock Unit Activity

Restricted stock activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		4,854,587		$	6.29
Granted		2,810,166		$	3.83
Vested		(2,432,556	)	$	6.07
Forfeited		(1,332,332	)	$	6.21
Non-vested – end of year		3,899,865		$	4.68

Performance Stock Unit Activity

PSU activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		2,269,410		$	5.51
Granted		1,963,478		$	3.98
Vested		(847,680	)	$	5.27
Forfeited		(1,751,342	)	$	4.94
Non-vested – end of year		1,633,866		$	4.40

Equity-Based Compensation Expense

The following table sets forth the total equity-based compensation expense resulting from stock options, SARs, restricted stock, and PSUs by line item on the income statement:

	2012			2011			2010
Cost of revenue – products	$	1.1		$	1.6		$	2.0
Cost of revenue – services		1.7			2.1			2.3
Research and development		5.5			7.9			8.4
Sales and marketing		2.9			4.3			5.2
General and administrative		8.6			8.7			9.1
Equity-based compensation expense before income taxes		19.8			24.6			27.0
Income tax benefit		(0.4	)		(2.8	)		(8.6	)
Total equity-based compensation expense after income taxes	$	19.4		$	21.8		$	18.4

Total Equity-Based Compensation Expense by Type

The following table sets forth the total equity-based compensation expense by type:

	2012			2011			2010
Stock options	$	4.1		$	4.8		$	5.1
Cash-settled SARs		(0.1	)		(0.3	)		0.2
Restricted stock		11.4			16.9			17.0
Performance stock units		4.4			3.2			4.7
Total	$	19.8		$	24.6		$	27.0

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Equity Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended											3 Months Ended	12 Months Ended
	Dec. 28, 2012 Y	Dec. 30, 2011	Dec. 31, 2010	Dec. 28, 2012 Restricted Stock	Dec. 30, 2011 Restricted Stock	Dec. 31, 2010 Restricted Stock	Dec. 28, 2012 Performance stock units	Dec. 30, 2011 Performance stock units	Dec. 31, 2010 Performance stock units	Dec. 28, 2012 Performance stock units Awards granted during 2011	Dec. 30, 2011 Performance stock units Awards granted during 2011	Mar. 30, 2011 Performance stock units Awards granted during 2010	Dec. 28, 2012 Performance stock units Awards granted during 2010	Dec. 31, 2010 Performance stock units Awards granted during 2010	Dec. 28, 2012 Performance stock units Awards Granted during Twenty Twelve [Member]	Dec. 28, 2012 Minimum	Dec. 28, 2012 Maximum	Dec. 28, 2012 Majority
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based grants vesting period																1 year	3 years	3 years
Stock and Stock Appreciation Rights Expiration (in years)	10
Number of shares for equity-based compensation grants approved by shareholders	53,889,977
Number of shares for equity-based compensation approved by shareholders available for grant	19,207,529
Aggregate intrinsic value of exercised stock options	$ 0.5	$ 1.5	$ 4.5
Weighted average fair value of stock options granted	$ 1.29	$ 2.00	$ 2.97
Fair market value of restricted stock vested				9.2	11.4	16.9
Equity-based compensation granted, grant date weighted average fair value				$ 3.83	$ 5.29	$ 8.68	$ 3.98				$ 5.39			$ 7.72	$ 3.98
Performance stock units granted							1,963,478	1,660,290	1,145,723
Shares issued for each PSU granted, maximum							2
Shares anticipated to be issued for each PSU granted							1.0
Percentage of performance stock units earned										50.00%			125.00%
Shares earned per performance stock unit										0.50			1.25
Number of common shares vested and issued for performance stock units										99,420		306,155	293,236
Results of operating earnings strategic goal target														237.0
Additional shares per Performance stock granted												183,737
Unrecognized equity-based compensation cost	$ 14.9
Weighted average period for equity-based compensation recognition, years	1 year 8 months 12 days

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Contingencies

12 Months Ended

Dec. 28, 2012

Contingencies

14. Contingencies

Legal Proceedings

We are subject to legal claims and litigation arising in the ordinary course of business, such as employment or intellectual property claims, including the matters described below. We are unable to determine the likelihood of an unfavorable outcome against us and are unable to reasonably estimate a range of loss, if any.

Fujitsu Network Communications Inc. v. Tellabs, Inc. On January 28, 2008, Fujitsu Network Communications, Inc. and Fujitsu Limited filed a complaint in the United States District Court for the Eastern District of Texas against Tellabs in a case captioned Fujitsu Network Communications, Inc. and Fujitsu Limited v. Tellabs, Inc. and Tellabs Operations, Inc., Civil Action No. 6:08-cv-00022-LED. The complaint alleges infringement of U.S. Patent Nos. 5,526,163 (‘163 patent), 5,521,737 (‘737 patent), 5,386,418 (‘418 patent) and 6,487,686 (‘686 patent), and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. The case was thereafter transferred to the United States District Court for the Northern District of Illinois (Case No. 1:09-cv-04530). As to Fujitsu’s ‘686 patent, on November 4, 2010, the Court dismissed with prejudice Fujitsu’s claim for infringement of the patent and Fujitsu signed a covenant not to sue Tellabs for infringement of the patent as to any Tellabs products as they currently exist or existed in the past. As to Fujitsu’s ‘418 patent, on March 31, 2011, the Court denied Tellabs’ motion for summary judgment of invalidity based on indefiniteness and granted Fujitsu’s motion for summary judgment for judicial correction of an error in asserted Claim 1. On September 26, 2012, the Court granted a motion by Tellabs for summary judgment of invalidity of all asserted claims of the ‘418 patent, and judgment was entered in favor of Tellabs on its counterclaim for declaratory judgment of invalidity of the patent. Fujitsu is appealing this order and judgment. As to Fujitsu’s ‘737 patent, on September 27, 2012, the Court denied a motion by Tellabs for summary judgment of invalidity. A trial date of January 14, 2013 had been set by the Court to commence trial of Fujitsu’s ‘163 and ‘737 patents, however on November 1, 2012, the scheduled trial date was struck from the Court’s calendar in favor of an alternative trial date to be later determined. On December 21, 2012, the Court granted a motion by Tellabs for summary judgment on lost profits damages, and as a result Fujitsu Limited is precluded from pursuing the theory of lost profits. Tellabs contests any liability and will continue to vigorously defend itself accordingly.

Tellabs Operations, Inc. v. Fujitsu Limited and Fujitsu Network Communications Inc. On June 11, 2008, Tellabs Operations, Inc. filed a complaint in the United States District Court for the Northern District of Illinois against Fujitsu Limited and Fujitsu Network Communications, Inc. in a case captioned Tellabs Operations, Inc. v. Fujitsu Limited and Fujitsu Network Communications, Inc. Civil Action No. 1:08-cv-3379. The complaint alleged infringement of Tellabs Operations, Inc.’s U.S. Patent No. 7,369,772 (‘772 patent), and sought unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. Fujitsu Limited brought counterclaims alleging infringement of two U.S. patents, namely U.S. Patent Nos. 5,533,006 (‘006 patent) and 7,227,681 (‘681 patent), seeking unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. On March 31, 2011, the Court issued an Order granting Tellabs’ motion for summary judgment of invalidity of all claims of Fujitsu’s ’006 patent. As to Tellabs’ ‘772 patent, Fujitsu pursued an inter partes reexamination of the patent in the Patent Office which resulted in a December 12, 2011, decision by the Board of Patent Appeals and Interferences (BPAI) to reverse the Examiner’s decision to not reject the claims of the patent, as well as a January 9, 2013, BPAI decision affirming the Examiner’s rejection of amended claims of the patent. On February 14, 2013, Tellabs moved to dismiss all claims related to the ‘772 patent. As to Fujitsu’s ‘681 patent, in July, 2012, the Court denied a Tellabs’ motion for summary judgment of invalidity and granted Fujitsu’s motion for summary judgment finding no inequitable conduct. Trial on Fujitsu’s ’681 patent commenced on August 27, 2012, and concluded on September 7, 2012, whereupon the jury’s verdict the Court entered judgment in favor of Tellabs on Fujitsu’s claim for infringement of the ‘681 patent and in favor of Fujitsu on Tellabs’ claim for invalidity of the same patent, and the parties’ respective post-trial motions were denied by the Court on January 24, 2013. On February 19, 2013, the Court granted Tellabs’ motion to dismiss claims related to Tellabs’ ‘772 patent and terminated Civil Action No. 1:08-Cv-3379.

Fujitsu Limited v. Tellabs, Inc. On April 30, 2012, Fujitsu Limited filed a complaint in the United States District Court for the Northern District of Illinois against Tellabs in a case captioned Fujitsu Limited v. Tellabs Operations, Inc., Tellabs, Inc., and Tellabs North America, Inc., Civil Action No. 1:12-cv-03229. The complaint alleges infringement of U.S. Patent Nos. 5,526,163, 5,521,737, 5,386,418 and 7,227,681, the same patents at issue in pending Civil Action Nos. 1:09-cv-04530 and 1:08-cv-3379, and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. The complaint includes allegations of infringement that Fujitsu previously sought unsuccessfully to add to pending Civil Action Nos. 1:09-cv-04530 and 1:08-cv-3379. On June 4, 2012, the Tellabs defendants filed a motion to dismiss the Complaint pursuant to Fed. R. Civ. P. 12(B)(6), which the Court granted in part and denied in part on January 30, 2013. Tellabs has not yet filed a response to the complaint.

Telcordia Technologies Inc. v. Tellabs, Inc. On May 4, 2009, Telcordia Technologies, Inc. filed a complaint against Tellabs in the United States District Court for the District of New Jersey in a case captioned Telcordia Technologies Inc. v. Tellabs, Inc., Civil Action No. 2:09-cv-02089. The complaint alleges infringement of U.S. Patent Nos. 4,893,306, 4,835,763 and Re. 36,633, and seeks unspecified damages including enhanced damages, as well as attorney fees and other remedies including injunctive relief. On July 27, 2009, Telcordia filed a first amended complaint adding Tellabs Operations, Inc. and Tellabs North America, Inc. as additional defendants. On December 15, 2009, the Court granted Tellabs’ motion to transfer, which resulted in a transfer of the action to the United States District Court for the District of Delaware (Case No. 1:2009cv00978). The parties are in the early phases of discovery. A trial date has not yet been set.

Cheetah Omni, LLC v. Alcatel-Lucent USA Inc. et al. On July 29, 2011, a complaint was filed in the United States District Court for the Eastern District of Texas, Tyler Division, against Tellabs and several other companies in a case captioned Cheetah Omni LLC v. Alcatel-Lucent USA Inc. et al., Civil Action No. 6:11cv390. The complaint includes allegations of infringement by Tellabs, Inc., Tellabs Operations, Inc., and Tellabs North America, Inc., of U.S. Patent Nos. 6,888,661; 6,847,479; 6,856,459; and 6,940,647, and seeks unspecified damages, as well as interest, costs, disbursements, attorney fees and other remedies including injunctive relief. The accused products include products from the Tellabs 7100 product line. On December 5, 2012, the Court entered an order staying the proceedings with respect to US Patents 6,888,661 and 6,847,479 until such time as an injunction issued by the Court of the Eastern District of Michigan in a separate action involving the two patents is lifted. The parties are in discovery, and a Markman hearing was held on February 14, 2013. A trial date has been set for March 10, 2014.

Internet Machines LLC v. Avnet, Inc., et al. On February 13, 2012, a second amended complaint was filed in the United States District Court for the Eastern District of Texas, Tyler Division, naming Tellabs, Inc. among several defendants in a case captioned Internet Machines LLC v. Avnet, Inc., et al., Civil Action Nos. 6:10-CV-548-MHS and 6:11-CV-250-MHS (Consolidated). The plaintiff thereafter filed a third amended complaint on March 2, 2012. The amended complaints allege infringement of U.S. Patent Nos. 7,454,552, 7,421,532, 7,814,259 and 7,945,722, and seek unspecified damages including enhanced damages, as well as interest, costs, expenses, attorney fees and other remedies including injunctive relief. On March 27, 2012, Tellabs filed its answer, defenses and counterclaims in response to the third amended complaint. On September 4, 2012, the Court issued an Order granting a motion by the defendants to stay the litigation, whereby the litigation is stayed pending entry of a final non-appealable judgment in a prior proceeding in which Tellabs is not named (Internet Machines LLC v. Alienware Corp., No 6:10-cv-23 (E.D. Tex. Filed Feb. 2, 2010)).

Stockholder Class Action Lawsuits

Beginning on January 23, 2013, several purported stockholder class action lawsuits were filed in the United States District Court for the Northern District of Illinois, against Tellabs, Inc. and certain other of our current or former officers. The lawsuits are similar and purport to bring suit on behalf of those who purchased the Company’s publicly traded securities between October 26, 2010, and April 26, 2011. Plaintiffs allege that defendants made false and misleading statements, purport to assert claims for violations of the federal securities laws, and seek unspecified compensatory damages and other relief. The Company believes these claims are without merit and intends to defend the actions vigorously.

Apart from the matters described above, we are and in the future may be subject to various legal proceedings, claims and litigation arising in the ordinary course of business.

The proceedings described above, including the Fujitsu matters, the Telcordia matter, the Cheetah Omni matter, the Internet Machines matter, and the stockholder class action matters, involve costly litigation and may result in diverting management’s time, attention and resources, delaying or halting product shipments or services delivery, requiring us to pay amounts in any damages and/or settlements, requiring us to enter into royalty-bearing licensing arrangements or to obtain substitute technology of lower quality or higher costs, and otherwise imposing obligations or restrictions on us and our business. We may be unsuccessful in any such litigation, despite the time, money, energy and bases for our assertion and/or defense of the matters. We may also be unable, if necessary, to enter into licensing arrangements or to obtain substitute technology on commercially reasonable terms or any terms. Any such settlements or inability to prevail or mitigate any liability or to obtain such licensing arrangements or substitute technology may adversely affect our business, financial condition and operating results. See Item 1A, Risk Factors, of this Form 10-K.

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Employee Benefit and Retirement Plans (Tables)

12 Months Ended

Dec. 28, 2012

Summarized Information of Benefit Obligations, Plan Assets and Funded Status

The following table summarizes benefit obligations, plan assets and funded status of the Retiree Medical Plan:

	12/28/12			12/30/11
Change in benefit obligation
Accumulated postretirement benefit obligation – beginning of year	$	12.0		$	10.3
Service cost		0.7			0.7
Interest cost		0.6			0.6
Actuarial loss		0.5			1.4
Benefits paid		(0.3	)		(0.2	)
Curtailment		(0.4	)		(0.8	)
Accumulated postretirement benefit obligation – end of year	$	13.1		$	12.0
Change in plan assets
Assets at fair value – beginning of year	$	9.8		$	10.1
Return on plan assets		0.8			(0.1	)
Benefits paid		(0.2	)		(0.2	)
Assets at fair value – end of year	$	10.4		$	9.8
Funded status (included in Other Long-Term Liabilities)	$	(2.7	)	$	(2.2	)

Fair Value of Plan Assets

The following table presents by level, within the fair value hierarchy, the value of assets of the Retiree Medical Plan at December 28, 2012, and December 30, 2011:

	Fair Value Measurements at December 28, 2012
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	4.2	$	—	$	—	$	4.2
Fixed income securities		6.2		—		—		6.2
Total assets	$	10.4	$	—	$	—	$	10.4

	Fair Value Measurements at December 30, 2011
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	3.6	$	—	$	—	$	3.6
Fixed income securities		2.6		—		—		2.6
Guaranteed income fund		—		3.6		—		3.6
Total assets	$	6.2	$	3.6	$	—	$	9.8

Components of Net Periodic Benefit (Credit) Cost

The following table summarizes components of net periodic benefit cost (credit) of the Retiree Medical Plan:

	2012			2011			2010
Components of net periodic postretirement benefit cost
Service cost	$	0.7		$	0.7		$	0.7
Interest cost		0.6			0.6			0.5
Expected return on assets		(0.6	)		(0.6	)		(0.6	)
Amortization of actuarial gain		(0.2	)		(0.3	)		(0.3	)
Amortization of unrecognized prior service cost		0.1			0.1			0.1
Net periodic postretirement benefit cost	$	0.6		$	0.5		$	0.4
Curtailment		(0.3	)		(0.7	)		—
Total cost (credit) for the year	$	0.3		$	(0.2	)	$	0.4

Weighted Average Assumptions Used to Determine Benefit Costs and Benefit Obligations

The following table summarizes the weighted average assumptions used to determine benefit costs and benefit obligations:

	2012			2011			2010
Discount rate used to determine benefit costs		5.00	%		5.75	%		6.00	%
Discount rate used to determine benefit obligation		4.50	%		5.00	%		5.75	%
Expected long-term rate of return on assets		6.50	%		6.50	%		6.50	%

Estimated Future Benefit Payments

The following table presents estimated future benefit payments for the Retiree Medical Plan as of December 28, 2012:

2013	$	0.3
2014	$	0.4
2015	$	0.4
2016	$	0.5
2017	$	0.5
2018 – 2022	$	3.8

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Selected Quarterly Financial Data (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended																	12 Months Ended
	Dec. 28, 2012		Dec. 31, 2012	Sep. 28, 2012		Jun. 29, 2012		Mar. 30, 2012		Dec. 30, 2011		Sep. 30, 2011		Jul. 01, 2011		Apr. 01, 2011		Dec. 28, 2012		Dec. 30, 2011		Dec. 31, 2010
Quarterly Financial Information [Line Items]
Revenue	$ 242.2			$ 264.4		$ 288.1		$ 257.9		$ 316.8		$ 329.8		$ 316.7		$ 322.4		$ 1,052.6		$ 1,285.7		$ 1,642.3
Gross profit	93.4			103.6		114.2		95.7		134.5		136.3		115.2		122.3		406.9		508.3		789.6
Net loss	$ (23.3)			$ (3.9)		$ (4.7)		$ (139.8)		$ (4.9)		$ (130.1)		$ (29.3)		$ (24.1)		$ (171.7)		$ (188.4)		$ 155.6
Basic	$ (0.06)	[1]		$ (0.01)	[1]	$ (0.01)	[1]	$ (0.38)	[1]	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.47)		$ (0.52)		$ 0.41
Diluted	$ (0.06)	[1]		$ (0.01)	[1]	$ (0.01)	[1]	$ (0.38)	[1]	$ (0.01)	[1]	$ (0.36)	[1]	$ (0.08)	[1]	$ (0.07)	[1]	$ (0.47)	[2]	$ (0.52)	[2]	$ 0.41	[2]
Cash dividends per share	$ 1.02	[3]		$ 0.02	[3]	$ 0.02	[3]	$ 0.02	[3]	$ 0.02		$ 0.02		$ 0.02		$ 0.02
Special dividend			$ 1

[1] The per-share computation for the year is a separate, annual calculation. Accordingly, the sum of the quarterly per-share amounts does not necessarily equal the annual per-share amount.

[2] Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

[3] Includes a special dividend of $1 per share in the fourth quarter of 2012.

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Net (Loss) Earnings per Share

12 Months Ended

Dec. 28, 2012

Net (Loss) Earnings per Share

16. Net (Loss) Earnings per Share

The following table sets forth the computation of net (loss) earnings per share:

	2012			2011			2010
Numerator:
Net (loss) earnings	$	(171.7	)	$	(188.4	)	$	155.6
Denominator:
Denominator for basic net (loss) earnings per share – weighted average shares outstanding		367.0			364.5			378.1
Effect of dilutive securities:
Employee stock options and restricted and performance stock awards		—			—			4.6
Denominator for diluted net (loss) earnings per share – adjusted weighted average shares outstanding and assumed conversions		367.0			364.5			382.7
Net (loss) earnings per share, basic	$	(0.47	)	$	(0.52	)	$	0.41
Net (loss) earnings per share, diluted 1	$	(0.47	)	$	(0.52	)	$	0.41
Anti-dilutive employee equity-based awards, excluded (in shares) 2		19.3			23.2			18.5

¹  Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

²  We exclude certain employee equity-based awards from the weighted average shares outstanding computation because the exercise price was greater than the average market price of the common shares; therefore, the effect would have been anti-dilutive.

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Schedule of Cash-Settled Stock Appreciation Rights Activity (Detail) (Cash-settled SARs, USD $)	12 Months Ended
	Dec. 28, 2012
Cash-settled SARs
Shares
Beginning of year	492,131
Granted	16,200
Forfeited/expired	(52,136)
Ending of year	456,195
Weighted Average Exercise Price
Weighted Average Exercise Price, Outstanding - beginning of year	$ 6.81
Weighted Average Exercise Price, Granted	$ 3.98
Weighted Average Exercise Price, Forfeited/expired	$ 7.15
Outstanding - end of year	$ 6.67

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Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data	Total	Common Stock	Additional Paid-In Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance at Jan. 01, 2010	$ 1,914.9	$ 5.0	$ 1,511.2	$ (1,037.9)	$ 1,296.8	$ 139.8
Beginning Balance (in shares) at Jan. 01, 2010		384,300,000
Net earnings (loss)	155.6				155.6
Other comprehensive income (loss)	(31.2)					(31.2)
Stock issued for employee stock programs (in shares)		4,000,000
Stock issued for employee stock programs	8.0		8.0
Equity-based compensation expense	26.8		26.8
Tax effect from equity-based compensation expense	1.9		1.9
Purchase of treasury stock (in shares)		(25,800,000)
Purchase of treasury stock	(184.2)			(184.2)
Cash dividends paid	(30.3)				(30.3)
Ending Balance at Dec. 31, 2010	1,861.5	5.0	1,547.9	(1,222.1)	1,422.1	108.6
Ending Balance (in shares) at Dec. 31, 2010		362,500,000
Net earnings (loss)	(188.4)				(188.4)
Other comprehensive income (loss)	(18.8)					(18.8)
Stock issued for employee stock programs (in shares)		3,500,000
Stock issued for employee stock programs	0.6	0.1	0.5
Equity-based compensation expense	24.9		24.9
Tax effect from equity-based compensation expense	(0.9)		(0.9)
Purchase of treasury stock (in shares)		(1,000,000)
Purchase of treasury stock	(5.1)			(5.1)
Cash dividends paid	(29.1)				(29.1)
Ending Balance at Dec. 30, 2011	1,644.7	5.1	1,572.4	(1,227.2)	1,204.6	89.8
Ending Balance (in shares) at Dec. 30, 2011		365,000,000
Net earnings (loss)	(171.7)				(171.7)
Other comprehensive income (loss)	9.2					9.2
Stock issued for employee stock programs (in shares)		3,600,000
Equity-based compensation expense	19.8		19.8
Purchase of treasury stock (in shares)		(1,000,000)
Purchase of treasury stock	(3.8)			(3.8)
Cash dividends paid	(396.9)				(396.9)
Ending Balance at Dec. 28, 2012	$ 1,101.3	$ 5.1	$ 1,592.2	$ (1,231.0)	$ 636.0	$ 99.0
Ending Balance (in shares) at Dec. 28, 2012		367,600,000

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Consolidated Statements of Comprehensive (Loss) Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Net (loss) earnings	$ (171.7)	$ (188.4)	$ 155.6
Reclassification adjustment for net gain included in net (loss) earnings, net of tax of $0.5, $0.1, $1.8	(1.1)	(0.6)	(2.4)
Unrealized net gain (loss) on available-for-sale securities, net of tax of $(0.6), $(0.5), $0.2	1.6	2.0	(0.4)
Unrealized net (loss) gain on net investment hedges, net of tax of $0.4, $(0.7), $(3.7)	(2.5)	1.9	6.4
Foreign currency translation adjustment, net of tax of $(2.9), $0.0, $0.0	11.3	(20.5)	(35.4)
Unrecognized prior service cost, net of tax of $0.0, $0.0, $0.0	0.1	0.1	0.1
Unrecognized net (loss) gain on retiree medical plan, net of tax of $0.1, $0.8, $(0.2)	(0.2)	(1.7)	0.5
Comprehensive (Loss) Income	$ (162.5)	$ (207.2)	$ 124.4

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Employee Benefit and Retirement Plans

12 Months Ended

Dec. 28, 2012

Employee Benefit and Retirement Plans

9. Employee Benefit and Retirement Plans

401(k) Plans

Our U.S. based employees may participate in the Tellabs 401(k) Plan. Upon meeting eligibility requirements, we match (dollar-for-dollar) up to the first 4% of the employee’s contribution. Both employee and employer contributions are vested immediately. The plan provides for a discretionary Company contribution, which is subject to Board of Directors approval and is funded entirely by the Company. The amount of the contribution, if approved, is based on a percent of pay for a specific period. All 401(k) eligible employees actively employed on the last business day of the declared period are immediately eligible to receive this fully vested contribution. The investment of these funds follows the participants’ elections on file for the program. The Board of Directors approved a 2% contribution for 2012, 2011 and 2010. We maintain similar plans for the benefit of eligible employees at most subsidiaries outside North America.

Contributions to these programs were $24.0 million in 2012, $27.6 million in 2011 and $27.5 million in 2010.

Deferred Income Plan

We provide a Deferred Income Plan that permits certain officers and management employees to defer portions of their compensation. As of December 28, 2012, the $16.7 million long-term portion of the deferred income obligation is included in Other Long-Term Liabilities and the $2.0 million current portion is included in Other accrued liabilities. Adjustments to reflect changes in the fair value of the amount owed to the employee are made to the applicable liability account with a corresponding charge (or credit) to compensation expense.

Retiree Medical Plan

We maintain a defined-benefit Retiree Medical Plan. Under the plan, we provide qualified retirees with a subsidy to offset their insurance premiums and allow the retirees to participate in the Company-sponsored healthcare plan. We made no contributions in 2012 or 2011. We currently do not anticipate making a contribution to the plan in 2013.

The following table summarizes benefit obligations, plan assets and funded status of the Retiree Medical Plan:

	12/28/12			12/30/11
Change in benefit obligation
Accumulated postretirement benefit obligation – beginning of year	$	12.0		$	10.3
Service cost		0.7			0.7
Interest cost		0.6			0.6
Actuarial loss		0.5			1.4
Benefits paid		(0.3	)		(0.2	)
Curtailment		(0.4	)		(0.8	)
Accumulated postretirement benefit obligation – end of year	$	13.1		$	12.0
Change in plan assets
Assets at fair value – beginning of year	$	9.8		$	10.1
Return on plan assets		0.8			(0.1	)
Benefits paid		(0.2	)		(0.2	)
Assets at fair value – end of year	$	10.4		$	9.8
Funded status (included in Other Long-Term Liabilities)	$	(2.7	)	$	(2.2	)

Our investment strategy for the plan’s assets focuses on asset allocation and diversification. As a result, the assets are diversified across asset classes to achieve a conservative risk profile. The plan’s assets were 60% invested in fixed income securities and 40% invested in equity securities at December 28, 2012. The plan’s assets were 37% invested in a guaranteed income fund, 37% invested in equity securities and 26% invested in fixed income securities at December 30, 2011. The actuarial losses in 2012 and 2011 were caused primarily by the changes in the discount rate.

We use the three-tier fair value hierarchy to measure the fair value of these investments. We classify the guaranteed fund as a Level 2 asset because the fund’s value is based on the contract value as determined by the custodian. The other assets are classified as Level 1 because they are invested in highly liquid, publicly traded securities which are valued daily using quoted prices in active markets.

The following table presents by level, within the fair value hierarchy, the value of assets of the Retiree Medical Plan at December 28, 2012, and December 30, 2011:

	Fair Value Measurements at December 28, 2012
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	4.2	$	—	$	—	$	4.2
Fixed income securities		6.2		—		—		6.2
Total assets	$	10.4	$	—	$	—	$	10.4

	Fair Value Measurements at December 30, 2011
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Equity securities	$	3.6	$	—	$	—	$	3.6
Fixed income securities		2.6		—		—		2.6
Guaranteed income fund		—		3.6		—		3.6
Total assets	$	6.2	$	3.6	$	—	$	9.8

The following table summarizes components of net periodic benefit cost (credit) of the Retiree Medical Plan:

	2012			2011			2010
Components of net periodic postretirement benefit cost
Service cost	$	0.7		$	0.7		$	0.7
Interest cost		0.6			0.6			0.5
Expected return on assets		(0.6	)		(0.6	)		(0.6	)
Amortization of actuarial gain		(0.2	)		(0.3	)		(0.3	)
Amortization of unrecognized prior service cost		0.1			0.1			0.1
Net periodic postretirement benefit cost	$	0.6		$	0.5		$	0.4
Curtailment		(0.3	)		(0.7	)		—
Total cost (credit) for the year	$	0.3		$	(0.2	)	$	0.4

The curtailments of $0.3 million in 2012 and $0.7 million in 2011 were primarily due to the reduction of employees during 2012 and 2011. We amortize the prior service cost using a straight-line method over the average remaining years of service to full eligibility for benefits of the active Retiree Medical Plan participants. We expect to amortize $0.1 million of unrecognized prior service cost and $0.1 million of actuarial gain in 2013.

The following table summarizes the weighted average assumptions used to determine benefit costs and benefit obligations:

	2012			2011			2010
Discount rate used to determine benefit costs		5.00	%		5.75	%		6.00	%
Discount rate used to determine benefit obligation		4.50	%		5.00	%		5.75	%
Expected long-term rate of return on assets		6.50	%		6.50	%		6.50	%

There is no trend rate assumption required for this plan because all liabilities are related to a fixed-dollar subsidy and are not related to medical claims. Therefore, any change in future medical inflation trends or assumptions will not affect the liabilities of this plan.

The discount rates used to determine benefit costs and benefit obligations were based on hypothetical zero coupon corporate bond yield curves that replicate the cash flows of the plan. The discount rate used decreased in 2012 and 2011 due to the decrease in the hypothetical zero coupon corporate bond yield curve.

The long-term historical relationships between equities and fixed-income securities consistent with the widely accepted capital market principle that assets with higher volatility generate a greater return over the long run. The long-term portfolio return takes into consideration the diversification of our assets. We evaluate current market factors, such as inflation and interest rates, before determining long-term capital return. We also consider the evaluation of external investment advisors.

The following table presents estimated future benefit payments for the Retiree Medical Plan as of December 28, 2012:

2013	$	0.3
2014	$	0.4
2015	$	0.4
2016	$	0.5
2017	$	0.5
2018 – 2022	$	3.8

There is $0.1 million of unrecognized prior service cost, net of tax, and $1.8 million of unrecognized net gain, net of tax, in Accumulated other comprehensive income at December 28, 2012.

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Future Minimum Lease Commitments under Non Cancelable leases (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012
Leases Future Minimum Payments [Line Items]
2013	$ 12.6
2014	9.9
2015	8.0
2016	6.4
2017	2.0
2018 and thereafter	1.5
Total minimum lease payments	$ 40.4

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Consolidated Revenue by Country Based on Customer Location (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Revenue from External Customer [Line Items]
Total revenue	$ 242.2	$ 264.4	$ 288.1	$ 257.9	$ 316.8	$ 329.8	$ 316.7	$ 322.4	$ 1,052.6	$ 1,285.7	$ 1,642.3
UNITED STATES
Revenue from External Customer [Line Items]
Consolidated revenue									513.4	642.5	1,138.2
All Other Countries
Revenue from External Customer [Line Items]
Consolidated revenue									$ 539.2	$ 643.2	$ 504.1

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Document and Entity Information (USD $)	12 Months Ended
	Dec. 28, 2012	Feb. 15, 2013	Jun. 29, 2012
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 28, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Trading Symbol	TLAB
Entity Registrant Name	TELLABS INC
Entity Central Index Key	0000317771
Current Fiscal Year End Date	--12-28
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		356,185,970
Entity Public Float			$ 1,108,958,938

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Income Taxes

12 Months Ended

Dec. 28, 2012

Income Taxes

10. Income Taxes

Components of (loss) earnings before income taxes are as follows:

	2012			2011			2010
Domestic source	$	(209.2	)	$	(264.3	)	$	134.9
Foreign source		60.6			69.3			56.6
(Loss) earnings before income tax	$	(148.6	)	$	(195.0	)	$	191.5

The provision for income tax (expense) benefit consists of the following:

	2012			2011			2010
Current
Federal	$	(2.9	)	$	12.9		$	(3.4	)
State		(0.7	)		(0.1	)		(2.9	)
Foreign		(13.8	)		(20.9	)		(13.1	)
Subtotal		(17.4	)		(8.1	)		(19.4	)
Deferred
Federal and state		(4.8	)		19.5			(10.2	)
Foreign		(0.9	)		(4.8	)		(6.3	)
Subtotal		(5.7	)		14.7			(16.5	)
Total income tax (expense) benefit	$	(23.1	)	$	6.6		$	(35.9	)

Deferred tax (liabilities) assets for 2012 and 2011 consist of the following:

	12/28/12			12/30/11
Deferred tax assets
Net operating loss and tax credit carryforwards	$	229.6		$	179.5
Amortizable intangibles		41.8			34.8
Inventory reserves		29.8			30.6
Deferred employee benefit expenses		17.2			22.8
Accrued liabilities		15.3			14.7
Deferred compensation plan		6.1			13.7
Restructuring accruals		5.7			5.7
Deferred revenue and advance payments		5.2			4.8
Fixed assets and depreciation		4.6			—
Other		13.1			11.3
Deferred tax assets	$	368.4		$	317.9
Deferred tax liabilities
Unrealized gain on marketable securities	$	(184.8	)	$	(196.0	)
Unremitted earnings of non-U.S. subsidiaries		(48.0	)		—
Fixed assets and depreciation		—			(0.5	)
Other		(6.7	)		(5.1	)
Deferred tax liabilities		(239.5	)		(201.6	)
Valuation allowance		(134.3	)		(113.8	)
Net deferred tax (liabilities) assets	$	(5.4	)	$	2.5

The net deferred income tax asset decreased from $2.5 million at December 30, 2011, to a net deferred income tax liability of $5.4 million at December 28, 2012. The $7.9 million change is attributable to an increase in the domestic valuation allowance and in the deferred tax liabilities offset by an increase in the carryforward of net operating losses and credits. The deferred tax liability includes $184.0 million representing taxes that will be due on certain hedge contract gains upon termination of our Loan related to other marketable securities.

A reconciliation of the reported effective income tax rates to the domestic federal income tax rate is as follows:

In percentages	2012			2011			2010
Statutory Federal income tax rate		35.0	%		35.0	%		35.0	%
Valuation allowance on net domestic deferred tax assets		(46.1	)		(20.4	)		(11.6	)
State income tax, net of federal benefits1		(0.8	)		3.0			(4.9	)
Foreign earnings taxed at different rates		2.6			(2.2	)		1.8
Research and development credits		0.1			4.2			(1.4	)
Nondeductible equity-based compensation expense		(0.4	)		(0.4	)		0.3
Interest related to prior year tax matters		(0.2	)		(0.2	)		0.3
Tax exempt interest		—			—			(0.1	)
Goodwill impairment		—			(14.8	)		—
Other, net		(5.8	)		(0.8	)		(0.6	)
Effective income tax rate		(15.6	)%		3.4	%		18.8	%

¹  In 2010, state income tax, net of federal benefits, reflects a benefit of $9.4 million, including interest, related to the reversal of reserves no longer required due to a lapse in the statute of limitations.

Deferred Tax Valuation Allowance

A valuation allowance is established when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The net cumulative loss for the current and prior two years represents sufficient negative evidence for the Company to determine that a full valuation allowance be established against its domestic deferred tax assets. This valuation allowance will offset assets associated with future tax deductions and carryforward items. We continue to maintain a valuation allowance against deferred tax assets related to tax benefits from certain non-U.S. net operating losses and tax credit carryforwards. Until an appropriate level of profitability is attained, we expect to maintain a valuation allowance on our net U.S. and certain non-U.S. deferred tax assets.

During 2012, our valuation allowance increased by $20.5 million. Our domestic valuation allowance reflects an increase in deferred tax assets of $23.0 million as a result of our cumulative loss position. The valuation allowance against our foreign deferred tax assets decreased by $2.5 million as the result of a decrease in deferred tax assets.

Summary of Carryforwards

We had the following tax net operating loss (tax effected) and credit carryforwards as of December 28, 2012:

			Years of expiration
	12/28/12		Beginning	Ending
U.S. net operating loss and credit carryforwards	$	179.1	2016		2032
U.S. capital loss carryforwards		0.4	2016		2016
State net operating loss and credit carryforwards		20.1	2013		2032
State credit carryforwards		13.8	no expiration
Foreign net operating loss and credit carryforwards		13.2	2013		2031
Foreign net operating loss carryforwards		3.0	no expiration
Total	$	229.6

Accounting for Uncertainty in Income Taxes

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	12/28/12			12/30/11
Balance – beginning of year	$	11.4		$	17.2
Additions based on tax positions related to the current year		1.9			2.8
Additions for tax positions of prior years		0.6			—
Reductions for tax positions of prior years as a result of a lapse in the statute of limitations		(0.7	)		(4.1	)
Reductions for tax positions of prior years relating to settlements with taxing authorities		—			(4.5	)
Balance – end of year	$	13.2		$	11.4

The ending balance at December 28, 2012, includes an accrual of $7.2 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. We continue to recognize interest and penalties related to income tax matters as part of income tax expense. Our tax provision included $0.3 million of interest and penalties for 2012, $0.4 million for 2011, and $0.6 million for 2010. The balance of interest and penalties accrued was $0.9 million as of December 28, 2012, and $0.7 million as of December 30, 2011. At December 28, 2012, the noncurrent accrual for taxes and interest was $14.1 million.

It is reasonably possible that unrecognized benefits related to domestic income taxes will decrease up to approximately $1.0 million as a result of the settlement of audits or the expiration of the statute of limitations within the next 12 months.

It is reasonably possible that unrecognized benefits related to foreign income taxes will decrease by approximately $1.0 million to $2.0 million as a result of the settlement of audits or the expiration of the statute of limitations within the next 12 months.

Investment in Foreign Operations

During 2012, we determined that a dividend of approximately $367.0 million would be remitted from our foreign subsidiaries. We recorded deferred U.S. income tax of $48.0 million and foreign withholding taxes of $1.0 million on this dividend. We have not provided deferred U.S. income taxes and foreign withholding taxes on the remaining undistributed cumulative earnings of foreign subsidiaries because we consider such earnings to be permanently reinvested in those operations. The undistributed cumulative earnings of foreign subsidiaries that are considered permanently reinvested outside the United States were $259.3 million at December 28, 2012. Upon repatriation of these earnings, we would be subject to U.S. income tax, net of available foreign tax credits. At December 28, 2012, the estimated amount of this unrecognized deferred tax liability on permanently reinvested foreign earnings, based on current exchange rates and assuming we are able to use foreign tax credits, was $32.5 million.

Audits

We file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. We are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities in our major jurisdictions for years before 2007. Our major jurisdictions currently include the United States, California, Illinois, Finland, Mexico, the United Kingdom, Brazil, Argentina, China, India, Japan, Malaysia and the Philippines. We are currently under audit by the State of Illinois for the 2007 and 2008 tax periods, in India for the 2009 tax period and in the Philippines for the 2010 tax period. During 2013, we expect the Internal Revenue Service to begin an audit of our 2010 and 2011 tax periods. Although we have recorded tax reserves for potential adjustments to tax liabilities for prior years, we cannot provide assurance that a material adjustment to our financial statements, either positive or negative, will not result when the audits are concluded.

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Provision for Income Tax Expense Benefit (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Components Of Income Tax Expense Benefit [Line Items]
Federal	$ (2.9)	$ 12.9	$ (3.4)
State	(0.7)	(0.1)	(2.9)
Foreign	(13.8)	(20.9)	(13.1)
Subtotal	(17.4)	(8.1)	(19.4)
Federal and state	(4.8)	19.5	(10.2)
Foreign	(0.9)	(4.8)	(6.3)
Subtotal	(5.7)	14.7	(16.5)
Total income tax (expense) benefit	$ (23.1)	$ 6.6	$ (35.9)

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Segment Profit and Reconciliation to Operating Loss Earnings by Segment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total segment profit	$ 184.7	$ 196.1	$ 502.4
Sales and marketing expenses	(126.4)	(163.0)	(179.3)
General and administrative expenses	(74.1)	(80.9)	(100.4)
Equity-based compensation	(8.4)	(11.9)	(12.5)
Intangible asset amortization	(5.4)	(20.2)	(27.0)
Restructuring and other charges	(119.0)	(20.3)	(9.5)
Goodwill and IPR&D impairment		(102.7)
Operating (loss) earnings	(156.7)	(202.9)	173.7
Optical Segment
Segment Reporting Information [Line Items]
Total segment profit	89.6	93.3	218.3
Data segment
Segment Reporting Information [Line Items]
Total segment profit	(6.8)	(6.6)	168.4
Access segment
Segment Reporting Information [Line Items]
Total segment profit	31.9	34.1	34.5
Services segment
Segment Reporting Information [Line Items]
Total segment profit	70.0	75.3	81.2
Discontinued 9200 Product
Segment Reporting Information [Line Items]
Inventory and purchase commitments for discontinued 9200 product	$ (8.1)

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Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Reclassification adjustment for net gain included in net earnings (loss),tax	$ 0.5	$ 0.1	$ 1.8
Unrealized net gain (loss) on available-for-sale securities ,tax	(0.6)	(0.5)	0.2
Unrealized net gain (loss) on net investment hedges ,tax	0.4	(0.7)	(3.7)
Foreign currency translation adjustments and other , tax	(2.9)	0	0
Unrecognized prior service cost ,tax	0	0	0
Unrecognized net gain (loss) on retiree medical plan ,tax	$ 0.1	$ 0.8	$ (0.2)

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Fair Value Measurements

12 Months Ended

Dec. 28, 2012

Fair Value Measurements

4. Fair Value Measurements

Our financial instruments consist of cash equivalents, accounts receivable, accounts payable, marketable securities and derivatives. The carrying value of the cash equivalents, accounts receivable and accounts payable are reasonable estimates of their fair value because of their short-term nature. We determine the fair value of marketable securities and derivatives based on observable inputs such as quoted prices in active markets, or other than quoted prices in active markets, that are observable either directly or indirectly.

Fair value is measured as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, a three-tier fair value hierarchy has been established, which prioritizes the inputs used in measuring fair value as follows:

• Level 1 – Observable inputs, such as quoted prices in active markets;

• Level 2 – Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and

• Level 3 – Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. In determining fair value for recurring financial assets and liabilities, we separate our financial instruments into three categories: marketable securities, other marketable securities and loan related to other marketable securities, and derivative financial instruments. These assets and liabilities are all valued based on the market approach that uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Marketable Securities

We use a third-party provider to determine fair values of marketable securities. The third-party provider receives market prices for each marketable security from a variety of industry-standard data providers, security master files from large financial institutions and other third-party sources with reasonable levels of price transparency. The third-party provider uses these multiple prices as inputs into a pricing model to determine a weighted average price for each security. Tellabs management compares the third-party pricing with pricing from outside investment managers and other market sources to ensure the third-party pricing is reasonable. We classify U.S. Treasury bills and bonds as Level 1 based upon quoted prices in active markets. All other marketable securities are classified as Level 2 based upon the other than quoted prices with observable market data. The type of instruments valued based upon the observable market data include U.S. government sponsored enterprise (agency) debt obligations, Federal Deposit Insurance Corporation (FDIC)-backed corporate debt obligations, investment grade corporate bonds, state and municipal debt obligations, mortgaged backed debt obligations guaranteed by the Government National Mortgage Association (GNMA), certain FDIC-backed bank certificates of deposit, foreign government debt obligations and foreign corporate debt obligations guaranteed by foreign governments.

Other Marketable Securities and Loan Related to Other Marketable Securities

We classify holdings in other marketable securities (Cisco common stock) and the related loan as Level 1 in the fair value hierarchy. We classify these as Level 1 since they are actively traded through a governed exchange.

Derivative Financial Instruments

Our foreign currency forward contracts are executed as exchange-traded. Market participants can be described as large money center or regional banks. Exchange-traded derivatives typically fall within Level 1 or Level 2 in the fair value hierarchy depending on whether they are deemed to be actively traded or not.

We have elected to value derivatives as Level 2, using observable market data at the measurement date and standard valuation techniques to convert future amounts to a single present amount (discounted). Key inputs for currency derivatives are the spot rate, interest rates and credit derivative swap spreads. The spot rate for each currency is the same spot rate used for all balance sheet translations at the measurement date. The following values are calculated from commonly quoted intervals available from a third-party financial information provider. Forward points and LIBOR rates are used to calculate a discount rate to apply to assets and liabilities. One-year credit default swap spreads are used to discount derivative assets, all of which have final maturities of less than 12 months. We calculate the discount to the derivative liabilities to reflect the potential credit risk to lenders and have used the spread over LIBOR based on the credit risk of our counterparties. Each asset is individually discounted to reflect our potential credit risk and we have used the spread over LIBOR based on similar credit risk. We do not adjust the fair value for immaterial credit risk.

We have applied a valuation method for financial assets and liabilities consistently during this period and prior periods. The following table sets forth by level within the fair value hierarchy “Financial instruments owned at fair value.” Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

Assets and liabilities measured at fair value on a recurring basis are:

	Fair Value Measurements at December 28, 2012
	Balance at 12/28/12		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	31.1	$	31.1	$	—	$	—
Corporate debt obligations		9.6		—		9.6		—
Mortgaged backed debt obligations guaranteed by GNMA		55.5		—		55.5		—
Certificates of deposit guaranteed by FDIC		1.2		—		1.2		—
Foreign government debt obligations		161.1		—		161.1		—
Foreign corporate debt obligations guaranteed by foreign governments		122.2		—		122.2		—
Subtotal		380.7		31.1		349.6		—
Other marketable securities		195.1		195.1		—		—
Total assets	$	575.8	$	226.2	$	349.6	$	—
Liabilities
Loan related to other marketable securities	$	195.1	$	195.1	$	—	$	—
Derivative financial instruments		0.1		—		0.1		—
Total liabilities	$	195.2	$	195.1	$	0.1	$	—

	Fair Value Measurements at December 30, 2011
	Balance at 12/30/11		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Investments in marketable securities
U.S. government debt obligations	$	195.7	$	195.7	$	—	$	—
Corporate debt obligations guaranteed by FDIC		66.8		—		66.8		—
Corporate debt obligations		201.5		—		201.5		—
Mortgaged backed debt obligations guaranteed by GNMA		91.2		—		91.2		—
Certificates of deposit guaranteed by FDIC		1.5		—		1.5		—
Foreign government debt obligations		223.0		—		223.0		—
Foreign corporate debt obligations guaranteed by foreign governments		64.2		—		64.2		—
Subtotal		843.9		195.7		648.2		—
Other marketable securities		190.9		190.9		—		—
Derivative financial instruments		0.2		—		0.2		—
Total assets	$	1,035.0	$	386.6	$	648.4	$	—
Liabilities
Loan related to other marketable securities	$	190.9	$	190.9	$	—	$	—
Derivative financial instruments		0.2		—		0.2		—
Total liabilities	$	191.1	$	190.9	$	0.2	$	—

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Goodwill and Intangible Assets

12 Months Ended

Dec. 28, 2012

Goodwill and Intangible Assets

3. Goodwill and Intangible Assets

Goodwill

Prior to the second quarter of 2012, we reported results of operations for three reporting segments: Broadband, Transport, and Services. As a result of strategy changes and internal reorganizations at the beginning of the second quarter of 2012, we are focusing on the Packet Optical (primarily our optical portfolio) and Mobile Backhaul (primarily our data portfolio) markets in addition to the on-going Access and Services businesses. With these strategic adjustments, we changed our reporting segments accordingly. Therefore, beginning with the second quarter of 2012, we have reported in the following four segments: Optical, Data, Access and Services (the Services segment was unchanged).

As of December 28, 2012, only the Services segment had goodwill totaling $122.1 million.

During the fourth quarter of 2012, we tested the Services segment for possible goodwill impairment as part of our annual review. As the Services segment’s estimated fair value was greater than its carrying value and no impairment indicators existed, further impairment tests were not deemed necessary and no impairment loss was recorded.

In the third quarter of 2011, we performed an interim review for the Broadband segment since we continued to experience a significant decline in business volume from a major customer that had an adverse impact on the results of the Broadband segment, and our overall market capitalization continued to fall below carrying value. As a result of our interim review, we recorded a goodwill impairment charge of $82.7 million, the full amount of Broadband segment goodwill. The Services segment did not incur an impairment of its goodwill since the fair value of the segment was determined to be greater than the carrying value.

	12/30/11
	Broadband			Services			Total
Beginning balance	$	82.7		$	122.2		$	204.9
Reductions		(82.7	)		—			(82.7	)
Currency translation adjustments		—			(0.2	)		(0.2	)
Ending balance	$	—		$	122.0		$	122.0

Intangible Assets

We amortize intangible assets with finite lives on a straight-line basis over their estimated useful lives. Trade names/trademarks were amortized over 4 to 12 months; customer relationships/backlog over 6 months to 9 years; non-compete agreements from 1.5 to 3 years; and developed technology over 2 to 7.5 years.

We evaluate the carrying value of intangible assets and other long-lived assets for impairment whenever indicators of impairment exist.

In conjunction with the January 30, 2012, restructuring plan, we recorded $47.7 million of accelerated amortization to Restructuring and other charges for abandoned intangible assets in the first quarter of 2012 related to the mobile packet core technology. As a result of the abandonment, we wrote these assets down to zero in the first quarter of 2012. In addition, the decrease in gross assets and accumulated amortization for certain assets in 2012 from 2011 was attributable to the removal of fully amortized and utilized assets.

Intangible assets with indefinite lives, which included IPR&D, were reviewed for impairment annually unless potential interim indicators existed that could have resulted in impairment. In conjunction with the interim goodwill impairment review, we assessed the valuation of the IPR&D in the third quarter of 2011. Updated management projections, related to the IPR&D which reflected a significant decline in anticipated business volumes, resulted in an impairment charge in the third quarter of 2011 of $20.0 million.

The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows:

	12/28/12
	Gross Assets		Accumulated Amortization			Net
Developed technology	$	126.1	$	(125.8	)	$	0.3
Customer relationships		30.9		(26.8	)		4.1
Total	$	157.0	$	(152.6	)	$	4.4

	12/30/11
	Gross Assets			Accumulated Amortization			Net
Developed technology	$	212.8		$	(169.1	)	$	43.7
Customer relationships/backlog		35.2			(23.7	)		11.5
Trade names/trademarks		0.2			(0.2	)		—
Leasehold improvements 1		(2.7	)		2.3			(0.4	)
Non-compete arrangements		13.1			(10.8	)		2.3
Total	$	258.6		$	(201.5	)	$	57.1

¹  Leasehold improvements as of December 30, 2011, reflects a net reclass of $0.5 million to Restructuring and other charges due to the reduction of a facility.

Our intangible assets will be fully amortized by the end of 2015. The estimated amortization expense of intangible assets is $4.2 million for 2013, $0.1 million for 2014, and $0.1 million for 2015.

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Stock Repurchase Programs

12 Months Ended

Dec. 28, 2012

Stock Repurchase Programs

15. Stock Repurchase Programs

We repurchase outstanding common stock under two plans authorized by our Board of Directors. In addition, we purchase shares to cover withholding taxes on shares issued under employee stock plans.

We intend to continue to use cash generated by employee stock option exercises (other than those of Company officers and board members) to repurchase stock through the use of a 10b5-1 plan. As of December 28, 2012, we have purchased 8.5 million shares of our common stock under this plan since February 2006, at a total cost of $101.4 million, including $0.1 million (27 thousand shares) in 2012 and $0.6 million (0.1 million shares) in 2011. On November 29, 2012, our Board of Directors authorized a one-year extension of this plan.

We intend to continue to make repurchases of our outstanding common stock under a previously authorized $600 million repurchase plan. As of December 28, 2012, we have purchased 56.6 million shares of our common stock under the $600 million repurchase plan at a total cost of $375.4 million, leaving $224.6 million available to be purchased under this plan. We purchased $22 thousand (9 thousand shares) in 2012. We did not purchase any shares under this plan in 2011.

We may change our repurchase activity and we provide no assurance that we will continue our repurchase activity in the future.

In addition, during 2012 we purchased 1.0 million shares for $3.7 million to cover minimum withholding taxes on shares issued under employee stock plans. In 2011, we purchased 0.9 million shares for $4.5 million to cover minimum withholding taxes on shares issued under employee stock plans.

We record repurchased shares as Treasury stock.

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Accumulated Other Comprehensive Income

12 Months Ended

Dec. 28, 2012

Accumulated Other Comprehensive Income

11. Accumulated Other Comprehensive Income

Accumulated other comprehensive income has no impact on our net (loss) earnings but is reflected in our consolidated balance sheet through adjustments to stockholders’ equity. Accumulated other comprehensive income derives from unrealized gains (losses) and related adjustments on available-for-sale securities, unrealized gains (losses) on cash flow and net investment hedges, foreign currency translation adjustments, unrecognized prior service costs and unrecognized net gains (losses) on our retiree medical plan.

Accumulated other comprehensive income (net of tax) for 2012, 2011 and 2010 consists of the following:

	Unrealized Net Gain (Loss) on Available- for-Sale Securities			Unrealized Net Gain (Loss) on Cash Flow Hedges			Foreign Currency Translation Adjustments			Unrecognized Prior Service Cost			Unrecognized Net Gain (Loss) on Retiree Medical Plan			Accumulated Other Comprehensive Income
Balance at January 1, 2010	$	4.7		$	(1.4	)	$	133.7		$	(0.4	)	$	3.2		$	139.8
Other Comprehensive Loss		(4.2	)		1.4			(29.0	)		0.1			0.5			(31.2	)
Balance at December 31, 2010	$	0.5		$	—		$	104.7		$	(0.3	)	$	3.7		$	108.6
Other Comprehensive Loss		1.4			—			(18.6	)		0.1			(1.7	)		(18.8	)
Balance at December 30, 2011	$	1.9		$	—		$	86.1		$	(0.2	)	$	2.0		$	89.8
Other Comprehensive Income		0.5			—			8.8			0.1			(0.2	)		9.2
Balance at December 28, 2012	$	2.4		$	—		$	94.9		$	(0.1	)	$	1.8		$	99.0

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Reconciliation of Reported Effective Income Tax Rate to Domestic Federal Income Tax Rate (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
Schedule Of Effective Tax Rates Line Items
State income tax, net of federal benefits	$ 9.4

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Product Warranties

12 Months Ended

Dec. 28, 2012

Product Warranties

7. Product Warranties

We provide warranties for all of our products. The specific terms and conditions of those warranties vary depending on the product. We provide a basic limited warranty for periods ranging from 90 days to 6 years.

The estimate of warranty liability involves many factors, including the number of units shipped, historical and anticipated rates of warranty claims, and cost per claim. We periodically assess the adequacy of the recorded warranty liability and adjust the amounts as necessary. Other adjustments to accruals for product warranties represent reductions due to favorable experience to previous estimates.

We classify the portion of warranty liability that we expect to incur in the next 12 months as a current liability. We classify the portion of warranty liability that we expect to incur more than 12 months in the future as a long-term liability. Product warranty liabilities are as follows:

Product warranty liabilities are as follows:

	12/28/12			12/30/11			12/31/10
Balance – beginning of year	$	17.0		$	19.4		$	31.4
Accruals for product warranties		6.1			7.8			6.1
Settlements		(4.2	)		(4.6	)		(4.6	)
Other adjustments to accruals for product warranties		(3.1	)		(5.6	)		(13.5	)
Balance – end of year	$	15.8		$	17.0		$	19.4
Balance sheet classification at end of year
Other accrued liabilities	$	6.8		$	7.9		$	7.5
Other long-term liabilities		9.0			9.1			11.9
Total product warranty liabilities	$	15.8		$	17.0		$	19.4

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Effect of Derivative Instruments Designated as Hedging Instruments on Consolidated Statements of Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
(Loss) Gain recognized in Accumulated OCI, net (Effective Portion)			$ 1.8
Cash Flow Hedging | Cost Of Revenue
Derivatives, Fair Value [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Total Cost of Revenue (Effective Portion)			0.6
Net Investment Hedge
Derivatives, Fair Value [Line Items]
(Loss) Gain recognized in Accumulated OCI, net (Effective Portion)	(2.5)	1.9	6.5
Net Investment Hedge | Other Income Expense
Derivatives, Fair Value [Line Items]
(Loss) Recognized in Other Income (Expenses), net: Excluded from Effectiveness Testing Gain (Loss)	$ 0.3	$ (0.6)

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Investments

12 Months Ended

Dec. 28, 2012

Investments

5. Investments

Investments in marketable securities

At December 28, 2012, and December 30, 2011, available-for-sale marketable securities consisted of the following:

	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
December 28, 2012
U.S. government debt obligations	$	31.1	$	—	$	—		$	31.1
Corporate debt obligations		9.5		0.1		—			9.6
Mortgaged backed debt obligations guaranteed by GNMA		54.9		0.6		—			55.5
Certificates of deposit guaranteed by FDIC		1.2		—		—			1.2
Foreign government debt obligations		159.3		1.8		—			161.1
Foreign corporate debt obligations guaranteed by foreign governments		121.5		0.7		—			122.2
Total	$	377.5	$	3.2	$	—		$	380.7
December 30, 2011
U.S. government debt obligations	$	195.2	$	0.5	$	—		$	195.7
Corporate debt obligations guaranteed by FDIC		66.6		0.2		—			66.8
Corporate debt obligations		201.4		0.8		(0.7	)		201.5
Mortgaged backed debt obligations guaranteed by GNMA		90.9		0.4		(0.1	)		91.2
Certificates of deposit guaranteed by FDIC		1.5		—		—			1.5
Foreign government debt obligations		221.5		1.5		—			223.0
Foreign corporate debt obligations guaranteed by foreign governments		64.1		0.2		(0.1	)		64.2
Total	$	841.2	$	3.6	$	(0.9	)	$	843.9

The following table summarizes the maturities of our available-for-sale marketable securities at December 28, 2012:

	Amortized Cost		Fair Value
Less than 12 months	$	117.1	$	117.4
Due in 1 to 5 years		205.5		207.8
Due after 5 years		54.9		55.5
Total	$	377.5	$	380.7

Gross unrealized gains and losses related to fixed-income securities were caused by interest rate fluctuations. No other-than-temporary impairments were recorded in 2012. We recognized other-than-temporary impairments of $1.2 million in 2011. No other-than-temporary impairments were recorded in 2010.

Investments in marketable securities with unrealized losses at December 28, 2012, were negligible. Investments in marketable securities with unrealized losses at December 30, 2011, were as follows:

	Unrealized Loss					Unrealized Loss				Fair Value		Total Unrealized Loss
	Less than 12 months					Greater than 12 months
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
December 30, 2011
Corporate debt obligations	$	81.0	$	(0.7	)	$	—	$	—	$	81.0	$	(0.7	)
Mortgaged backed debt obligations guaranteed by GNMA		31.4		(0.1	)		—		—		31.4		(0.1	)
Foreign government debt obligations guaranteed by foreign governments		24.1		(0.1	)		—		—		24.1		(0.1	)
Total	$	136.5	$	(0.9	)	$	—	$	—	$	136.5	$	(0.9	)

The following table presents gross realized gains and losses related to fixed income investments:

	2012			2011			2010
Gross realized gains	$	4.4		$	3.8		$	14.9
Gross realized losses 1		(1.3	)		(4.9	)		(2.7	)
Total	$	3.1		$	(1.1	)	$	12.2

¹  Includes other-than-temporary impairments of $1.2 million for the year ended December 30, 2011.

Other marketable securities and Loan related to other marketable securities

With the acquisition of Advanced Fibre Communications, Inc. (AFC) in 2004, we acquired 10.6 million shares of Cisco common stock, shown as Other marketable securities in Current Assets in our Consolidated Balance Sheets. Our Cisco common stock is classified as a trading security. In addition, we have a share loan arrangement with a financial institution for the same number of shares of Cisco common stock shown as Loan related to other marketable securities in Current Liabilities in our Consolidated Balance Sheets, which is due on demand.

As a result, we own the same number of Cisco shares as we have borrowed under the share loan arrangement; thereby, eliminating any market risk exposure associated with the share loan arrangement as increases (or decreases) in the value of Cisco stock are off-set equally by increases (or decreases) in the value of the shares of Cisco stock we own. In the event the counter-party financial institution to the share loan arrangement demands return of the borrowed Cisco shares, we will settle the obligation with our Cisco shares or with shares borrowed from another lender.

Other marketable securities and Loan related to other marketable securities was $195.1 million at a market price of $19.45 per share at December 28, 2012, and $190.9 million at a market price of $18.08 per share at December 30, 2011. The fees associated with the stock loan agreement were $1.2 million in 2012, $1.1 million in 2011 and $1.5 million in 2010, included in Interest income, net in the Consolidated Statements of Operations.

Additionally, in connection with our acquisition of AFC, we recorded a tax liability associated with a deferred gain relating to a settled hedging arrangement on the acquired Cisco shares. The deferred tax liability was $184.0 million as of December 28, 2012, and $195.2 million as of December 30, 2011.

The Cisco shares and related loan discussed above are maintained by us in order to defer recognition of the tax gain for income tax purposes. In the fourth quarter of 2012, we settled 0.6 million shares, reducing the number of borrowed shares to 10.0 million. In the future we may settle all or a portion of the remaining borrowed shares to the extent we are able to offset the gain by utilizing net operating loss or tax credit carryforwards. To the extent we cannot offset all or a portion of the gain, we may incur cash tax payments that could significantly reduce our cash and cash equivalents.

Long-term equity investments

In addition to the above investments, we maintain investments in partnerships and start-up technology companies. We include these investments in Other Assets, at cost. These investments totaled $1.8 million at December 28, 2012, and $3.2 million at December 30, 2011. We review each investment quarterly, including historical and projected financial performance, expected cash needs and recent funding events. We recognize other-than-temporary impairments if the market value of the investment is below its cost basis for an extended period of time or if the issuer has experienced significant financial declines or difficulties in raising capital to continue operations. We did not record other–than-temporary impairments for the year ended December 28, 2012. We recognized a gain of $3.0 million on the sale of a long-term equity investment for the year ended December 28, 2012. Other-than-temporary impairments were $1.0 million for the year ended December 30, 2011, and $3.8 million for the year ended December 31, 2010. Gains on the sale of long-term equity investments and other-than-temporary impairments are included in Other income (expense), net in the Consolidated Statements of Operations.

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Derivative Financial Instruments

12 Months Ended

Dec. 28, 2012

Derivative Financial Instruments

6. Derivative Financial Instruments

Financial Contracts and Market Risk

We conduct business on a global basis in U.S. and foreign currencies, subjecting us to risks associated with fluctuating foreign exchange rates. To mitigate these risks, we use derivative foreign exchange contracts to address nonfunctional exposures that are expected to be settled in one year or less. The derivative foreign exchange contracts consist of foreign currency forward and option contracts.

Derivative financial contracts involve elements of market and credit risk. The market risk that results from these contracts relates to changes in foreign currency exchange rates, which generally are offset by changes in the value of the underlying assets or liabilities being held. Credit risk relates to the risk of nonperformance by a counterparty to one of the derivative contracts. We do not believe there is a significant credit risk associated with our hedging activities. We monitor the counterparties’ credit ratings and other market data to minimize credit risk. In addition, we also limit the aggregate contract amount entered into with any one financial institution to mitigate credit risk.

Cash Flow Hedges

We use foreign currency forward and option contracts, designated as cash flow hedges, to mitigate currency risk related to an imbalance of nonfunctional currency denominated costs and related revenue. We conduct monthly effectiveness tests of these hedging relationships on a spot-to-spot basis, excluding forward points. Effective gains and losses from derivative contracts are recorded in Accumulated other comprehensive income until the underlying transactions occur, at which time they are reclassified to Total cost of revenue. Ineffectiveness is recorded to Other income (expense), net. If it becomes probable that an anticipated transaction that is hedged will not occur, we immediately reclassify the gains or losses related to that hedge from Accumulated other comprehensive income to Other income (expense), net. At December 28, 2012, we did not have any cash flow hedges outstanding. We continue to monitor the Company’s overall currency exposure and may elect to add additional cash flow hedges in the future if deemed necessary.

Balance Sheet Hedges (Non-designated Hedges)

Short-term monetary assets and liabilities denominated in currencies other than the functional currency are remeasured through income as foreign currency rates fluctuate. Changes in the value of derivative contracts intended to offset these fluctuations are also recorded in income. These derivative contracts are not designated as hedges. At December 28, 2012, we held non-designated foreign currency forward contracts in 10 currencies, with a gross notional equivalent of $125.5 million. At December 31, 2011, we held non-designated foreign currency forward contracts in 11 currencies, with a gross notional equivalent of $151.9 million.

Net Investment Hedges

We entered into three-month foreign currency forward contracts and a three-month foreign currency collar contract, designated as net investment hedges, to hedge a portion of our net investment in one of our foreign subsidiaries to preserve the U.S. dollar value of our Euro cash. Effective changes in the fair value of these contracts, less applicable deferred income taxes are recorded within Accumulated other comprehensive income. Those amounts will be reflected in income only when we dispose of the investment in the foreign subsidiary. We conduct monthly effectiveness tests of net investment hedges on a spot-to-spot basis, excluding forward points, and any measurement of ineffectiveness is recorded in income. As of December 28, 2012, we had a net unrealized gain of $16.1 million in Accumulated other comprehensive income related to settled contracts. At December 28, 2012, we did not have any net investments hedges outstanding. As of December 30, 2011, we had a net unrealized gain of $18.6 million in Accumulated other comprehensive income, which includes a net gain of $18.5 million related to settled contracts and a net gain of $0.1 million related to unsettled contracts.

The fair value of derivative instruments in the Consolidated Balance Sheet as of December 28, 2012, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Balance sheet hedges (Non-designated hedges)	$	—	$	0.1

The fair value of derivative instruments in the Consolidated Balance Sheet as of December 30, 2011, was as follows:

	Asset Derivatives Reported in Miscellaneous Receivables and Other Current Assets		Liability Derivatives Reported in Other Accrued Liabilities
Net investment hedges	$	0.1	$	—
Balance sheet hedges (Non-designated hedges)		0.1		0.2
Total derivatives	$	0.2	$	0.2

The effect of derivative instruments designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	(Loss) Gain Recognized in Accumulated OCI, net (Effective Portion)
	2012			2011		2010
Cash flow hedges	$	—		$	—	$	1.8
Net investment hedges	$	(2.5	)	$	1.9	$	6.5

	Gain Reclassified from Accumulated OCI into Total Cost of Revenue (Effective Portion)
	2012		2011		2010
Cash flow hedges	$	—	$	—	$	0.6

	Gain (Loss) Recognized in Other Income (Expense), net: Excluded from Effectiveness Testing Gain (Loss)
	2012		2011			2010
Net investment hedges	$	0.3	$	(0.6	)	$	—

The effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Operations for the years ended December 28, 2012, December 30, 2011, and December 31, 2010, was as follows:

	Gain (Loss) Recognized in Other Income (Expense), net 1
	2012		2011		2010
Foreign currency forward and option contracts	$	1.9	$	1.0	$	(8.7	)

¹ The gains or losses from changes in the fair value of the derivative contracts are generally offset by gains or losses of the underlying transactions being hedged.

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Equity-Based Compensation

12 Months Ended

Dec. 28, 2012

Equity-Based Compensation

8. Equity-Based Compensation

The Tellabs, Inc. Amended and Restated 2004 Incentive Compensation Plan (2004 Plan) provides for the grant of short-term and long-term incentives, including stock options, stock appreciation rights (SARs), restricted stock and performance stock units (PSUs). Equity-based grants vest over one to three years, with the majority vesting over a three-year period. We recognize compensation expense for stock options, restricted stock and PSUs over the service period based on the fair value on the grant date. Stock options and SARs granted but unexercised expire 10 years from the grant date. Stockholders previously approved 53,889,977 shares for grant under the 2004 Plan, of which 19,207,529 remain available for grant at December 28, 2012.

Stock Options

We estimate the fair value of stock options using the Black-Scholes option-pricing model. This model requires the use of assumptions that will have a significant impact on the fair value estimate. The following table summarizes the assumptions used to compute the weighted average fair value of stock option grants:

	2012			2011			2010
Expected volatility		43.3	%		46.5	%		42.0	%
Risk-free interest rate		0.9	%		2.0	%		2.1	%
Expected term (in years)		5.3			5.3			5.3
Expected dividend yield		2.0	%		1.5	%		1.0	%

We based our calculation of expected volatility on a combination of historical and implied volatility for options granted. We based the risk-free interest rate on the U.S. Treasury yield curve in effect at the date of grant. We estimated the expected term of the options using their vesting period, post-vesting employment termination behavior and historical exercise patterns. We based the expected dividend yield on the option’s exercise price and annualized dividend rate at the date of grant.

The following is a summary of stock option activity during 2012, and status at December 28, 2012:

	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in millions)
Outstanding – beginning of year		20,719,482		$	7.68
Granted		2,102,207		$	3.95
Exercised		(150,593	)	$	0.63
Forfeited/expired		(5,957,941	)	$	7.05
Outstanding – end of year		16,713,155		$	7.50		3.6	$	—
Exercisable – end of year		14,282,666		$	7.96		2.7	$	—
Options vested or expected to vest		16,566,555		$	7.53		3.6	$	—

The aggregate intrinsic value in the preceding table represents the total pretax intrinsic value, based on our closing stock price as of December 28, 2012, that the option holders would have received had all holders exercised their options as of that date. The aggregate intrinsic value of exercised stock options was $0.5 million in 2012, $1.5 million in 2011 and $4.5 million in 2010.

The weighted average fair value of stock options granted was $1.29 in 2012, $2.00 in 2011 and $2.97 in 2010.

Cash-Settled Stock Appreciation Rights

The 2004 Plan provides for the granting of cash-settled SARs in conjunction with, or independent of, the stock options under the 2004 Plan. These SARs allow the holder to receive in cash the difference between the cash-settled SARs’ grant price (the market value of our stock on the grant date) and the market value of our stock on the date the holder exercises the SAR. There were no cash payments in 2012 and the cash payments were negligible in 2011 and 2010. The following is a summary of cash-settled SARs activity in 2012:

	Shares			Weighted Average Exercise Price
Outstanding – beginning of year		492,131		$	6.81
Granted		16,200		$	3.98
Forfeited/expired		(52,136	)	$	7.15
Outstanding – end of year		456,195		$	6.67

Restricted Stock

The fair market value of restricted stock vested was $9.2 million in 2012, $11.4 million in 2011 and $16.9 million in 2010. The weighted average grant date fair value of restricted stock was $3.83 per share in 2012, $5.29 per share in 2011 and $8.68 per share in 2010. Restricted stock activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		4,854,587		$	6.29
Granted		2,810,166		$	3.83
Vested		(2,432,556	)	$	6.07
Forfeited		(1,332,332	)	$	6.21
Non-vested – end of year		3,899,865		$	4.68

Performance Stock Units

The 2004 Plan provides for the granting of PSUs. We granted 1,963,478 PSUs in 2012, 1,660,290 PSUs in 2011 and 1,145,723 PSUs in 2010. The PSUs granted in 2012 entitle the recipients to receive shares of our common stock commencing in the first quarter of 2013, contingent on the achievement of operating earnings targets and strategic goals for the 2012 fiscal year. Following achievement of these measures and subject to continued employment, one-third of such shares will be issued in annual installments beginning in the first quarter of 2013. At maximum target performance, we will issue two shares for each PSU granted. The weighted average fair value of PSUs granted in 2012 was $3.98 per share. The number of PSUs to be issued in the first quarter of fiscal 2013 for the 2012 fiscal year is anticipated to be 1.0 share for each PSU granted, subject to continued employment.

The PSUs granted in 2011 entitle the recipients to receive shares of our common stock commencing in the first quarter of 2012, contingent on the achievement of strategic goals for 2011. Performance was based upon achieving market share and market penetration gains, product development achievement, and a customer service objective with respect to strategic goals. Under the executive plan, 50% of the PSUs were earned and 0.50 shares for each PSU will be paid out, subject to continued employment. We issued one-third (99,420 shares) of the total shares in the first quarter of 2012 and generally, one-third of such shares will be issued in annual installments in the first quarter of 2013 and the first quarter of 2014. Since 2011 minimum strategic goals were not met for the mobile internet plan, none of the PSUs were earned, no expense was incurred, and no amounts will be paid out with respect to them. The weighted average fair value of PSUs granted in 2011 was $5.39 per share.

The PSUs granted in 2010 entitle the recipients to receive shares of our common stock contingent on the achievement of operating earnings targets and strategic goals or on the achievement of revenue targets and strategic goals for 2010. Based on 2010 operating earnings of $237.0 million and market share and market penetration gains in some of the identified product areas, 125% of the PSUs were earned and 1.25 shares for each PSU (183,737 additional shares) granted will be paid out, subject to continued employment. We issued one-third of the total shares (306,155 shares) in the first quarter of 2011, issued 293,236 shares in 2012 and the remainder will be issued in the first quarter of 2013, subject to continued employment. The weighted average price of PSUs granted in 2010 was $7.72 per share. PSU activity for 2012 follows:

	Shares			Weighted Average Grant Date Fair Value
Non-vested – beginning of year		2,269,410		$	5.51
Granted		1,963,478		$	3.98
Vested		(847,680	)	$	5.27
Forfeited		(1,751,342	)	$	4.94
Non-vested – end of year		1,633,866		$	4.40

Equity-Based Compensation Expense

The following table sets forth the total equity-based compensation expense resulting from stock options, SARs, restricted stock, and PSUs by line item on the income statement:

	2012			2011			2010
Cost of revenue – products	$	1.1		$	1.6		$	2.0
Cost of revenue – services		1.7			2.1			2.3
Research and development		5.5			7.9			8.4
Sales and marketing		2.9			4.3			5.2
General and administrative		8.6			8.7			9.1
Equity-based compensation expense before income taxes		19.8			24.6			27.0
Income tax benefit		(0.4	)		(2.8	)		(8.6	)
Total equity-based compensation expense after income taxes	$	19.4		$	21.8		$	18.4

The following table sets forth the total equity-based compensation expense by type:

	2012			2011			2010
Stock options	$	4.1		$	4.8		$	5.1
Cash-settled SARs		(0.1	)		(0.3	)		0.2
Restricted stock		11.4			16.9			17.0
Performance stock units		4.4			3.2			4.7
Total	$	19.8		$	24.6		$	27.0

As of December 28, 2012, we had $14.9 million of unrecognized equity-based compensation cost that we expect to recognize over a weighted average period of 1.7 years.

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Balance Sheet Classification of Product Warranty Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010	Jan. 01, 2010
Product Warranty Liability [Line Items]
Other accrued liabilities	$ 6.8	$ 7.9	$ 7.5
Other long-term liabilities	9.0	9.1	11.9
Total product warranty liabilities	$ 15.8	$ 17.0	$ 19.4	$ 31.4

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Tax Net Operating Loss Tax Effected and Credit Carryforwards (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	229.6
U.S. Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	179.1
U.S. Capital Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	0.4
State Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	20.1
State Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	13.8
Foreign Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	13.2
Foreign Net Operating Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Tax net operating loss (tax effected) and credit carryforwards	3.0
Minimum | U.S. Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2016
Minimum | U.S. Capital Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2016
Minimum | State Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2013
Minimum | State Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	no expiration
Minimum | Foreign Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2013
Minimum | Foreign Net Operating Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	no expiration
Maximum | U.S. Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2032
Maximum | U.S. Capital Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2016
Maximum | State Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2032
Maximum | Foreign Net Operating Loss And Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Years of expiration	2031

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Schedule of Assumptions Used to Calculate Weighted Average Fair Value of Stock Option Grants (Detail)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	43.30%	46.50%	42.00%
Risk-free interest rate	0.90%	2.00%	2.10%
Expected term (in years)	5 years 3 months 18 days	5 years 3 months 18 days	5 years 3 months 18 days
Expected dividend yield	2.00%	1.50%	1.00%

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Schedule of Standard Product Warranty Liabilities (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Product Warranty Liability [Line Items]
Balance - beginning of year	$ 17.0	$ 19.4	$ 31.4
Accruals for product warranties	6.1	7.8	6.1
Settlements	(4.2)	(4.6)	(4.6)
Other adjustments to accruals for product warranties	(3.1)	(5.6)	(13.5)
Balance - end of year	$ 15.8	$ 17.0	$ 19.4

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Long-Lived Assets by Country (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Schedule Of Long Lived Assets [Line Items]
Long-lived assets	$ 390.7	$ 486.7
UNITED STATES
Schedule Of Long Lived Assets [Line Items]
Long-lived assets	312.3	407.3
FINLAND
Schedule Of Long Lived Assets [Line Items]
Long-lived assets	57.9	55.8
All Other Countries
Schedule Of Long Lived Assets [Line Items]
Long-lived assets	$ 20.5	$ 23.6

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Product Warranties (Tables)

12 Months Ended

Dec. 28, 2012

Schedule of Standard Product Warranty Liabilities

Product warranty liabilities are as follows:

	12/28/12			12/30/11			12/31/10
Balance – beginning of year	$	17.0		$	19.4		$	31.4
Accruals for product warranties		6.1			7.8			6.1
Settlements		(4.2	)		(4.6	)		(4.6	)
Other adjustments to accruals for product warranties		(3.1	)		(5.6	)		(13.5	)
Balance – end of year	$	15.8		$	17.0		$	19.4

Balance Sheet Classification of Product Warranty Liabilities

Product warranty liabilities are as follows:

Balance sheet classification at end of year
Other accrued liabilities	$	6.8	$	7.9	$	7.5
Other long-term liabilities		9.0		9.1		11.9
Total product warranty liabilities	$	15.8	$	17.0	$	19.4

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Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	$ 380.7	$ 843.9
Other marketable securities	195.1	190.9
Derivative financial instruments		0.2
Total Assets	575.8	1,035.0
Loan related to other marketable securities	195.1	190.9
Derivative financial instruments	0.1	0.2
Total Liabilities	195.2	191.1
U.S. government debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	31.1	195.7
Corporate debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	9.6	201.5
Mortgaged backed debt obligations guaranteed by GNMA
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	55.5	91.2
Certificates of deposit guaranteed by FDIC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	1.2	1.5
Foreign government debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	161.1	223.0
Foreign corporate debt obligations guaranteed by foreign governments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	122.2	64.2
Corporate debt obligations guaranteed By FDIC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities		66.8
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	31.1	195.7
Other marketable securities	195.1	190.9
Total Assets	226.2	386.6
Loan related to other marketable securities	195.1	190.9
Total Liabilities	195.1	190.9
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	31.1	195.7
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	349.6	648.2
Derivative financial instruments		0.2
Total Assets	349.6	648.4
Derivative financial instruments	0.1	0.2
Total Liabilities	0.1	0.2
Significant Other Observable Inputs (Level 2) | Corporate debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	9.6	201.5
Significant Other Observable Inputs (Level 2) | Mortgaged backed debt obligations guaranteed by GNMA
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	55.5	91.2
Significant Other Observable Inputs (Level 2) | Certificates of deposit guaranteed by FDIC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	1.2	1.5
Significant Other Observable Inputs (Level 2) | Foreign government debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	161.1	223.0
Significant Other Observable Inputs (Level 2) | Foreign corporate debt obligations guaranteed by foreign governments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities	122.2	64.2
Significant Other Observable Inputs (Level 2) | Corporate debt obligations guaranteed By FDIC
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments in marketable securities		$ 66.8

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Operating Lease Commitments

12 Months Ended

Dec. 28, 2012

Operating Lease Commitments

13. Operating Lease Commitments

We have a number of operating lease agreements primarily involving office space, buildings and office equipment. These leases are non-cancelable and expire on various dates through 2022. As of December 28, 2012, future minimum lease commitments under non-cancelable leases are as follows:

2013	$	12.6
2014		9.9
2015		8.0
2016		6.4
2017		2.0
2018 and thereafter		1.5
Total minimum lease payments	$	40.4

Total rental expense was $13.1 million for 2012, $17.4 million for 2011 and $12.7 million for 2010.

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Subsequent Event

12 Months Ended

Dec. 28, 2012

Subsequent Event

18. Subsequent Event

On January 31, 2013, management initiated a restructuring plan that is designed to align expenses with revenue. Tellabs is discontinuing the development of the 9200 product and reducing operating expenses. Actions under this plan are expected to be substantially completed by the end of the second quarter of 2013. We expect to record pretax charges of approximately $38 million, primarily in the first quarter of 2013. The pretax charges will consist of $18 million for workforce reductions of approximately 300 employees, $16 million for facility- and asset-related charges, and $4 million for software license and other contract cancellations. Estimated cash payments under this plan are expected to be $25 million beginning in the first quarter of 2013 and continuing through the end of 2017.

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Stock Repurchase Programs - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Equity, Class of Treasury Stock [Line Items]
Number of stock repurchase programs authorized by the Board of Directors	2
Repurchase of outstanding common stock	$ 3,800,000	$ 5,100,000	$ 184,200,000
Cash Generated by Employee Stock Option Exercises
Equity, Class of Treasury Stock [Line Items]
Cumulative Repurchase of common stock - shares	8,500,000
Cumulative Repurchase of outstanding common stock	101,400,000
Repurchase of outstanding common stock	100,000	600,000
Purchase of treasury stock, shares	27,000	100,000
$600 Million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Cumulative Repurchase of common stock - shares	56,600,000
Cumulative Repurchase of outstanding common stock	375,400,000
Repurchase of outstanding common stock	22,000
Purchase of treasury stock, shares	9,000
Authorization to repurchase outstanding common stock	600,000,000
Stock available to be purchased under stock repurchase program	224,600,000
Other Stock Repurchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of outstanding common stock	$ 3,700,000	$ 4,500,000
Purchase of treasury stock, shares	1,000,000	900,000

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Gross Carrying Amount and Accumulated Amortization of Intangible Assets Subject to Amortization (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 157.0	$ 258.6
Accumulated Amortization	(152.6)	(201.5)
Net	4.4	57.1
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	126.1	212.8
Accumulated Amortization	(125.8)	(169.1)
Net	0.3	43.7
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	30.9	35.2
Accumulated Amortization	(26.8)	(23.7)
Net	4.1	11.5
Trade names/trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Assets		0.2
Accumulated Amortization		(0.2)
Leasehold improvements
Finite-Lived Intangible Assets [Line Items]
Gross Assets		(2.7)	[1]
Accumulated Amortization		2.3	[1]
Net		(0.4)	[1]
Non-compete arrangements
Finite-Lived Intangible Assets [Line Items]
Gross Assets		13.1
Accumulated Amortization		(10.8)
Net		$ 2.3

[1] Leasehold improvements as of December 30, 2011, reflects a net reclass of $0.5 million to Restructuring and other charges due to the reduction of a facility.

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Net (Loss) Earnings per Share (Tables)

12 Months Ended

Dec. 28, 2012

Computation of Net Loss Per Share

The following table sets forth the computation of net (loss) earnings per share:

	2012			2011			2010
Numerator:
Net (loss) earnings	$	(171.7	)	$	(188.4	)	$	155.6
Denominator:
Denominator for basic net (loss) earnings per share – weighted average shares outstanding		367.0			364.5			378.1
Effect of dilutive securities:
Employee stock options and restricted and performance stock awards		—			—			4.6
Denominator for diluted net (loss) earnings per share – adjusted weighted average shares outstanding and assumed conversions		367.0			364.5			382.7
Net (loss) earnings per share, basic	$	(0.47	)	$	(0.52	)	$	0.41
Net (loss) earnings per share, diluted 1	$	(0.47	)	$	(0.52	)	$	0.41
Anti-dilutive employee equity-based awards, excluded (in shares) 2		19.3			23.2			18.5

¹  Dilutive securities are not included in the computation of diluted earnings per share when a company is in a loss position. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for 2012 and 2011 are the same. Diluted weighted average shares outstanding were 368.8 million in 2012 and 367.6 million in 2011.

²  We exclude certain employee equity-based awards from the weighted average shares outstanding computation because the exercise price was greater than the average market price of the common shares; therefore, the effect would have been anti-dilutive.

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Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 28, 2012	Dec. 30, 2011
Current Assets
Cash and cash equivalents	$ 223.7	$ 132.7
Investments in marketable securities	380.7	843.9
Total cash, cash equivalents and marketable securities	604.4	976.6
Other marketable securities	195.1	190.9
Accounts receivable, net of allowances of $1.3 and $1.3	246.8	317.6
Inventories
Raw materials	30.2	33.7
Finished goods	70.8	110.3
Total Inventories	101.0	144.0
Income taxes	7.3	27.9
Miscellaneous receivables and other current assets	35.1	39.8
Total Current Assets	1,189.7	1,696.8
Property, Plant and Equipment
Land	20.1	20.0
Buildings and improvements	193.5	197.4
Equipment	406.4	446.9
Total property, plant & equipment	620.0	664.3
Accumulated depreciation	(389.6)	(390.8)
Property, plant and equipment, net	230.4	273.5
Goodwill	122.1	122.0
Intangible Assets, Net of Amortization	4.4	57.1
Other Assets	91.5	98.6
Total Assets	1,638.1	2,248.0
Current Liabilities
Accounts payable	57.4	97.1
Accrued compensation	37.7	46.3
Restructuring and other charges	19.1	13.0
Income taxes	61.5	63.5
Loan related to other marketable securities	195.1	190.9
Deferred revenue	20.3	40.8
Other accrued liabilities	78.5	78.4
Total Current Liabilities	469.6	530.0
Long-Term Restructuring Liabilities	2.8	4.7
Income Taxes	21.9	21.2
Other Long-Term Liabilities	42.5	47.4
Stockholders' Equity
Preferred stock: authorized 5,000,000 shares of $0.01 par value; no shares issued and outstanding
Common stock: authorized 1,000,000,000 shares of $0.01 par value; 508,846,484 and 505,238,503 shares issued	5.1	5.1
Additional paid-in capital	1,592.2	1,572.4
Treasury stock, at cost: 141,284,352 and 140,250,476 shares	(1,231.0)	(1,227.2)
Retained earnings	636.0	1,204.6
Accumulated other comprehensive income	99.0	89.8
Total Stockholders' Equity	1,101.3	1,644.7
Total Liabilities and Stockholders' Equity	$ 1,638.1	$ 2,248.0

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Segment Information - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 30, 2012 Segment	Dec. 28, 2012 Segment	Dec. 30, 2011	Dec. 31, 2010 Consolidated Revenue Accounted By Customer One	Dec. 31, 2010 Consolidated Revenue Accounted By Customer Two
Segment Reporting Information [Line Items]
Number of operating segments	3	4
Percentage of revenue accounted for by one customer		24.00%	22.00%
Percentage of revenue accounted for by one customer				35.00%	20.00%

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Restructuring and Other Charges

12 Months Ended

Dec. 28, 2012

Restructuring and Other Charges

2. Restructuring and Other Charges

On October 24, 2012, management initiated a restructuring plan that is designed to further align expenses with revenue and current market conditions. In order to reduce costs and operating expenses, this plan includes moving certain functions to lower cost geographies. The pretax charges will consist of approximately $9 million for severance-related charges that will affect approximately 200 employees, and $2 million for facility- and asset-related charges. Restructuring expense for this plan for 2012 was $9.4 million, which consists of expense of $9.2 million for severance-related charges and a $0.2 million charge for facility- and asset-related charges. By segment, total charges to date under this plan are $2.6 million for Optical, $3.1 million for Data, $0.9 million for Access, and $2.8 million for Services. Estimated cash payments under this plan are expected to be $9.7 million, of which $0.8 million has been paid through 2012. Other than the cash payments, actions under this plan are expected to be substantially completed by the end of the fourth quarter of 2013.

On January 30, 2012, management initiated a restructuring plan that aligns expenses with revenue. Tellabs stopped new development on the Tellabs^® SMARTCORE 9100 series for mobile packet core and consolidated research and development into fewer locations. The pretax charges for this plan will consist of approximately $23 million for severance-related charges of approximately 500 employees, $38 million for facility- and asset-related charges and $48 million for the accelerated amortization for abandoned intangible assets. Restructuring expense for this plan in 2012 was $108.8 million, which consists of expense of $23.2 million for severance-related charges, $36.7 million for facility- and asset-related charges, $47.7 million for the accelerated amortization of abandoned intangible assets, and $1.2 million for other obligations. By segment, total charges to date under this plan are $4.4 million for Optical, $100.7 million for Data, $1.5 million for Access, and $2.2 million for Services. Estimated cash payments under this plan are expected to be $30.6 million, of which $22.9 million has been paid through 2012. Other than the cash payments, actions under this plan are expected to be substantially completed by the end of the first quarter of 2013.

On July 25, 2011, management initiated a restructuring plan to align our cost structure to business conditions at that time. Net restructuring expense for this plan in 2012 was $1.5 million, which consists of a $0.9 million charge for facility- and asset-related charges and $0.6 million for severance-related charges. Cumulative restructuring charges for this plan are $21.3 million, which consists of $15.2 million for severance-related charges, $5.5 million for facility- and asset-related charges, and $0.6 million for other obligations. By segment, total charges to date under this plan are $8.6 million for Optical, $7.2 million for Data, $1.8 million for Access and $3.7 million for Services. Estimated cash payments under this plan are expected to be $18.9 million, of which $16.3 million has been paid through 2012. Other than the cash payments, restructuring actions under this plan were substantially completed in the second quarter of 2012.

On January 25, 2010, management initiated a restructuring plan to enable us to shift investment from TDM (Time Division Multiplexing) to Ethernet and IP products, move our supply chain closer to suppliers, and reduce general and administrative expenses. A restructuring credit for 2012 was $0.1 million for severance-related charges. The cumulative pretax restructuring charges for this plan are $9.7 million, which consists of $7.0 million for workforce reductions and $2.7 million for facility- and asset-related charges. By segment, total charges to date under this plan are $3.6 million for Optical, $5.3 million for Data, $0.5 million for Access and $0.3 million for Services. Total cash payments under this plan are $7.2 million which have been paid through 2012. Other than the cash payments, restructuring actions under this plan were completed in the first quarter of 2011.

Restructuring credit for previous restructuring plans for 2012 was $0.6 million for facility- and asset-related charges. These expenses are due to changes in previous estimates related to certain lease obligations.

The balance for restructuring plans relates to net lease obligations that expire through 2017 and cash severance that we expect to pay through the first quarter of 2015.

The following table summarizes restructuring and other charges recorded for the plans mentioned above, as well as adjustments for prior restructurings:

	2012		2011		2010
Severance and other termination benefits	$	32.9	$	15.9	$	6.9
Facility and other exit costs		37.3		3.8		2.6
Accelerated amortization of intangible assets		47.7		—		—
Other obligations		1.1		0.6		—
Total restructuring and other charges	$	119.0	$	20.3	$	9.5

The following table summarizes our restructuring and other charges activity by segment during 2012 and 2011 and the status at year-end:

	Balance at 12/30/11		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/28/12
2012 Restructuring Plans
Optical	$	—	$	7.0		$	(2.2	)	$	(0.9	)	$	3.9
Data		—		103.8			(18.6	)		(76.6	)		8.6
Access		—		2.4			(0.7	)		(0.2	)		1.5
Services		—		5.0			(2.2	)		—			2.8
Subtotal 2012 Restructuring Plans		—		118.2			(23.7	)		(77.7	)		16.8
2011 Restructuring Plan
Optical		4.4		1.7			(5.1	)		(0.6	)		0.4
Data		5.5		—			(3.4	)		(0.2	)		1.9
Access		1.1		0.1			(0.9	)		—			0.3
Services		1.6		(0.3	)		(1.3	)		—			—
Subtotal 2011 Restructuring Plan		12.6		1.5			(10.7	)		(0.8	)		2.6
Previous Restructuring Plans
Optical		0.4		(0.1	)		(0.1	)		—			0.2
Data		1.9		—			(0.7	)		—			1.2
Access		2.6		(0.6	)		(0.9	)		—			1.1
Services		0.2		—			(0.2	)		—			—
Subtotal Previous Restructuring Plans		5.1		(0.7	)		(1.9	)		—			2.5
Total All Restructuring Plans	$	17.7	$	119.0		$	(36.3	)	$	(78.5	)	$	21.9

	Balance at 12/31/10		Restructuring Expense			Cash Payments			Other Activities 1			Balance at 12/30/11
2011 Restructuring Plan
Optical	$	—	$	6.8		$	(1.5	)	$	(0.9	)	$	4.4
Data		—		7.2			(1.3	)		(0.4	)		5.5
Access		—		1.7			(0.5	)		(0.1	)		1.1
Services		—		4.0			(2.3	)		(0.1	)		1.6
Subtotal 2011 Restructuring Plan		—		19.7			(5.6	)		(1.5	)		12.6
2010 Restructuring Plans
Optical		1.1		0.2			(1.2	)		—			0.1
Data		0.8		0.4			(1.1	)		—			0.1
Access		0.5		—			(0.4	)		—			0.1
Services		—		0.2			(0.2	)		—			—
Subtotal 2010 Restructuring Plans		2.4		0.8			(2.9	)		—			0.3
Previous Restructuring Plans
Optical		1.8		(1.1	)		(0.4	)		—			0.3
Data		2.9		(0.4	)		(0.6	)		(0.1	)		1.8
Access		3.2		0.8			(1.4	)		(0.1	)		2.5
Services		0.5		0.5			(0.8	)		—			0.2
Subtotal Previous Restructuring Plans		8.4		(0.2	)		(3.2	)		(0.2	)		4.8
Total All Restructuring Plans	$	10.8	$	20.3		$	(11.7	)	$	(1.7	)	$	17.7

¹ Other activities include accelerated amortization related to abandoned intangible assets, accelerated depreciation of property, plant and equipment to be disposed, the effects of currency translation as well as other changes that do not flow through restructuring expense.

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Derivative Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012 Contract	Dec. 30, 2011 Contract
Derivative [Line Items]
Non-designated foreign currency forward contracts, number of currencies held	10	11
Non-designated foreign currency forward contracts, gross notional equivalent amount	$ 125.5	$ 151.9
Net unrealized gain on net investment hedges in Accumulated other comprehensive income		18.6
Settled Contracts
Derivative [Line Items]
Net unrealized gain on net investment hedges in Accumulated other comprehensive income	16.1	18.5
Unsettled Contracts
Derivative [Line Items]
Net unrealized gain on net investment hedges in Accumulated other comprehensive income		$ 0.1

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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Income Tax [Line Items]
Net deferred tax assets	$ (5.4)	$ 2.5
Change in net deferred income tax asset	(7.9)
Deferred tax liability that will be due on certain hedge contract gains upon termination of our Loan related to other marketable securities	184.0	195.2
Valuation allowance changes	20.5
Unrecognized tax benefits that if recognized, would affect the effective tax rate	7.2
Interest and penalties associated with unrecognized tax benefits	0.3	0.4	0.6
Interest and penalties associated with unrecognized tax benefits (balance sheet)	0.9	0.7
Unrecognized tax benefits income tax and interest accrued noncurrent	14.1
Permanently reinvested earnings of foreign subsidiaries	259.3
Estimated unrecognized deferred tax liability on permanently reinvested earnings of foreign subsidiaries	32.5
Foreign withholding taxes	0.9	4.8	6.3
Domestic
Income Tax [Line Items]
Valuation allowance changes	23.0
Unrecognized tax benefit that could be reduced in the next twelve months	1.0
Foreign
Income Tax [Line Items]
Valuation allowance changes	(2.5)
Foreign | Minimum
Income Tax [Line Items]
Unrecognized tax benefit that could be reduced in the next twelve months	1.0
Foreign | Maximum
Income Tax [Line Items]
Unrecognized tax benefit that could be reduced in the next twelve months	2.0
Foreign Subsidiaries
Income Tax [Line Items]
Dividend from foreign subsidiaries	367.0
Deferred U.S. income tax	48.0
Foreign withholding taxes	$ 1.0

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Schedule of Restricted Stock Unit Activity (Detail) (Restricted Stock, USD $)	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Restricted Stock
Shares
Beginning of year	4,854,587
Granted	2,810,166
Vested	(2,432,556)
Forfeited	(1,332,332)
Ending of year	3,899,865	4,854,587
Weighted Average Grant Date Fair Value
Non-vested - beginning of year	$ 6.29
Granted	$ 3.83	$ 5.29	$ 8.68
Vested	$ 6.07
Forfeited	$ 6.21
Non-vested - end of period	$ 4.68	$ 6.29

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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

12 Months Ended

Dec. 28, 2012

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

TELLABS, INC. AND SUBSIDIARIES

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

Three Years Ended December 28, 2012, December 30, 2011 and December 31, 2010

Accounts Receivable Allowances

In millions	Balance at Beginning of Year		Net Additions (Reductions) Charged to Costs and Expenses		Deductions		Currency Translation Adjustments			Balance at End of Year
2012	$	1.3	$	—	$	—	$	—		$	1.3
2011	$	1.3	$	—	$	—	$	—		$	1.3
2010	$	1.4	$	—	$	—	$	(0.1	)	$	1.3

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Information of Benefit Obligations Plan Assets and Funded Status (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Accumulated postretirement benefit obligation - beginning of year	$ 12.0	$ 10.3
Service cost	0.7	0.7	0.7
Interest cost	0.6	0.6	0.5
Actuarial loss	0.5	1.4
Benefits paid	(0.3)	(0.2)
Curtailment	(0.4)	(0.8)
Accumulated postretirement benefit obligation - end of year	13.1	12.0	10.3
Assets at fair value - beginning of year	9.8	10.1
Return on plan assets	0.8	(0.1)
Benefits paid	(0.2)	(0.2)
Assets at fair value - end of year	10.4	9.8	10.1
Funded status	$ (2.7)	$ (2.2)

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Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 28, 2012

Accumulated Other Comprehensive Income

Accumulated other comprehensive income (net of tax) for 2012, 2011 and 2010 consists of the following:

	Unrealized Net Gain (Loss) on Available- for-Sale Securities			Unrealized Net Gain (Loss) on Cash Flow Hedges			Foreign Currency Translation Adjustments			Unrecognized Prior Service Cost			Unrecognized Net Gain (Loss) on Retiree Medical Plan			Accumulated Other Comprehensive Income
Balance at January 1, 2010	$	4.7		$	(1.4	)	$	133.7		$	(0.4	)	$	3.2		$	139.8
Other Comprehensive Loss		(4.2	)		1.4			(29.0	)		0.1			0.5			(31.2	)
Balance at December 31, 2010	$	0.5		$	—		$	104.7		$	(0.3	)	$	3.7		$	108.6
Other Comprehensive Loss		1.4			—			(18.6	)		0.1			(1.7	)		(18.8	)
Balance at December 30, 2011	$	1.9		$	—		$	86.1		$	(0.2	)	$	2.0		$	89.8
Other Comprehensive Income		0.5			—			8.8			0.1			(0.2	)		9.2
Balance at December 28, 2012	$	2.4		$	—		$	94.9		$	(0.1	)	$	1.8		$	99.0

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Segment Information

12 Months Ended

Dec. 28, 2012

Segment Information

12. Segment Information

Prior to the second quarter of 2012, we reported results of operations for three reporting segments: Broadband, Transport, and Services. As a result of strategy changes and internal reorganizations at the beginning of the second quarter of 2012, we are focusing on the Packet Optical (primarily our optical portfolio) and Mobile Backhaul (primarily our data portfolio) markets in addition to the on-going Access and Services businesses. With these strategic adjustments, we changed our reporting segments accordingly. Therefore, beginning with the second quarter of 2012, we have reported in the following four segments: Optical, Data, Access and Services (the Services segment was unchanged).

Optical segment products are primarily used to manage large volumes of telecommunication traffic in metro areas. The Optical segment includes Tellabs^® 5000 Series of Digital Cross-Connect systems, the Tellabs^® 6300 Managed Transport System, the Tellabs^® 7100 OTS and the Tellabs^® 7300 Metro Ethernet Switching Series.

Data segment products are primarily used in mobile backhaul applications, and for business services and various edge routing applications. The Data segment includes the Tellabs^® 8100 Managed Access Systems and the Tellabs 8600 and 8800 Smart Routers.

Access segment products are primarily used to enable service providers to bundle Internet, video, and voice over high-speed fiber-based networks and in Optical LAN applications. The Access segment includes the Tellabs^® 1000 and 1100 Multi-service Access systems, and the Tellabs^® 1600 Optical Network Terminals.

The Services segment delivers deployment, training, support and professional services to Tellabs’ customers. Through these offerings, Tellabs serves its customers through the phases of planning, deploying and operating a network.

We define segment profit as gross profit less research and development expenses. Segment profit excludes sales and marketing expenses, general and administrative expenses, the amortization of intangibles, restructuring and other charges, the impact of equity-based compensation and the goodwill and IPR&D impairment charges.

Consolidated revenue by segment follows:

	2012		2011		2010
Optical	$	432.0	$	482.1	$	644.2
Data		265.5		413.9		557.7
Access		156.5		166.4		198.1
Services		198.6		223.3		242.3
Total revenue	$	1,052.6	$	1,285.7	$	1,642.3

Segment profit and reconciliation to operating (loss) earnings by segment follows:

	2012			2011			2010
Optical	$	89.6		$	93.3		$	218.3
Data		(6.8	)		(6.6	)		168.4
Access		31.9			34.1			34.5
Services		70.0			75.3			81.2
Total segment profit	$	184.7		$	196.1		$	502.4
Sales and marketing expenses		(126.4	)		(163.0	)		(179.3	)
General and administrative expenses		(74.1	)		(80.9	)		(100.4	)
Inventory and purchase commitments for discontinued 9200 product		(8.1	)		—			—
Equity-based compensation		(8.4	)		(11.9	)		(12.5	)
Intangible asset amortization		(5.4	)		(20.2	)		(27.0	)
Restructuring and other charges		(119.0	)		(20.3	)		(9.5	)
Goodwill and IPR&D impairment		—			(102.7	)		—
Operating (loss) earnings	$	(156.7	)	$	(202.9	)	$	173.7

The segments use many of the same assets. For internal reporting purposes, we do not allocate assets by segment and therefore no asset, depreciation and amortization, or capital expenditure by segment information is provided to our chief operating decision maker.

During 2012, revenue from one customer accounted for 24% of consolidated revenue. In 2011, revenue from one customer accounted for 22% of consolidated revenue. In 2010, revenue from two customers accounted for 35% and 20% of consolidated revenue. We attribute revenue to customers based on the effective date of any relevant merger. Revenue from this major customer is earned in each operating segment.

Consolidated revenue by country based on customer location follows:

	2012		2011		2010
United States	$	513.4	$	642.5	$	1,138.2
All other countries		539.2		643.2		504.1
Total	$	1,052.6	$	1,285.7	$	1,642.3

Long-lived assets by country follow:

	12/28/12		12/30/11
United States	$	312.3	$	407.3
Finland		57.9		55.8
All other countries		20.5		23.6
Total	$	390.7	$	486.7