UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

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

DATE OF REPORT (Date of earliest event reported) July 21, 2004

TELLABS, INC.
(Exact name of registrant as specified in its charter)

Delaware	0-9692	36-3831568
(State of Incorporation)	(Commission file	(I.R.S. Employer
	number)	Identification No.)

One Tellabs Center, 1415 W.
Diehl Road, Naperville, Illinois	60563
(Address of Principal Executive Offices)	(Zip Code)

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

N/A
(Former name or former address, if changed since last report)

Item 12. Results of Operations and Financial Condition.

On July 21, 2004, Tellabs, Inc. reported its results of operations for its fiscal second quarter ended July 2, 2004. A copy of the press release issued by Tellabs, Inc. concerning the foregoing results is furnished herewith as Exhibit 99.

The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing of Tellabs, Inc., whether made before or after the date hereof, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference to such filing. The information in this report, including the exhibit hereto, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended.

In addition to reporting financial results in accordance with generally accepted accounting principles, or GAAP, Tellabs, Inc. provides non-GAAP results of operations in the press release as additional information for its operating results. These measures are not in accordance with, or an alternative for, GAAP and may be different from measures used by other companies. The non-GAAP results of operations eliminate certain items of expenses and losses from cost of goods sold, operating expenses and other income and expenses. The Company’s management believes that this presentation allows investors to evaluate the current operational and financial performance of the Company’s core business as an indicator of future operational and financial performance. The Company’s management uses these measures for reviewing its financial results and for business planning and performance. Tellabs, Inc.‘s management discloses this information externally along with a complete reconciliation of their comparable GAAP amounts, to provide access to the detail and general nature of adjustments made to GAAP financial results. Furthermore, while some of these items have been periodically reported in Tellabs, Inc.’s results of operations, including significant restructuring and other charges, their occurrence in future periods is dependent upon future business and economic factors, among other evaluation criteria, and may frequently be beyond the control of management.

SIGNATURE

Pursuant to the requirements 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.

(Registrant)

/s/ James A. Dite             

James A. Dite

Vice President and Controller

(Principal Accounting Officer)

July 21, 2004
(Date)

EXHIBIT INDEX

Exhibit Number	Description
99	Press Release of Tellabs, Inc., dated July 21, 2004.