8-K

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): August 10, 2007

CSG SYSTEMS INTERNATIONAL, INC.

(Exact name of registrant as specified in its charter)

Delaware	0-27512	47-0783182
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

9555 Maroon Circle, Englewood, CO	80112
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (303) 200-2000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01 Regulation FD Disclosure.

The following information is furnished pursuant to Item 7.01 (Regulation FD Disclosure). This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

On August 13, 2007, CSG Systems International, Inc. (“CSG”) issued a press release announcing that it has completed the acquisition of Prairie Voice Services, Inc. (“Prairie”). Additionally, CSG and Prairie have agreed to rename the company Prairie Interactive Messaging, Inc. CSG initially announced the acquisition on July 30, 2007.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibit

99.1 Press release of CSG Systems International, Inc. dated August 13, 2007.

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SIGNATURES

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 hereunto duly authorized.

Date: August 13, 2007

CSG SYSTEMS INTERNATIONAL, INC.
By:	/s/ Randy Wiese
	Randy Wiese,
	Principal Accounting Officer

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CSG Systems International, Inc.

Form 8-K

Exhibit Index

99.1 Press release of CSG Systems International, Inc. dated August 13, 2007

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EX-99.1

Exhibit 99.1

NEWS RELEASE

FOR IMMEDIATE RELEASE

CSG SYSTEMS COMPLETES ACQUISITION OF PRAIRIE VOICE

SERVICES, INC.

Prairie Voice Services Changes Name to Prairie Interactive Messaging

ENGLEWOOD, Colo. (August 13, 2007) — CSG Systems International, Inc. (NASDAQ: CSGS), a leading provider of customer care and billing solutions, today announced that it has completed the acquisition of Prairie Voice Services, Inc. CSG initially announced the acquisition on July 30, 2007.

Additionally, CSG and Prairie have agreed to rename the company Prairie Interactive Messaging, Inc. and that it will operate as a wholly owned CSG company. The name change aims to better communicate the capabilities of Prairie’s set of unified, interactive messaging solutions that manage customer interactions through inbound and outbound automated voice, text/SMS, email, and fax messaging services.

About CSG Systems

Headquartered in Englewood, Colorado, CSG Systems International (NASDAQ: CSGS) is the leading provider of outsourced billing, customer care and print and mail solutions and services supporting the North American cable and direct broadcast satellite markets. CSG’s solutions support some of the world’s largest and most innovative providers of bundled multi-channel video, Internet, voice and IP-based services. CSG’s unique combination of solutions, services and expertise ensure that cable and satellite operators can continue to rapidly launch new service offerings, improve operational efficiencies and deliver a high-quality customer experience in a competitive and ever-changing marketplace. For more information, visit our website at www.csgsystems.com.

About Prairie Interactive Messaging, Inc.

Prairie Interactive Messaging Inc., formerly Prairie Voice Services, provides set of unified, interactive messaging solutions developed to manage customer interactions through inbound and outbound automated voice, text/SMS, email, and fax messaging services. The company delivers applications that manage workforce communications, collections, critical communications, lead generation, automated order entry and other key business functions. Clients include a number of Fortune 500 companies, with emphasis in the financial services, telecommunications, transportation, direct response and contact center business sectors. The company’s consultative approach results in applications designed specifically to meet each client’s individual business objectives. Prairie Interactive Messaging, Inc. is a wholly owned company of CSG Systems, Inc. For more information, visit www.prairie.csgsystems.com.

Safe-Harbor Statement

This news release contains forward-looking statements as defined under the Securities Act of 1933, as amended, that are based on assumptions about a number of important factors and involve risks and uncertainties that could cause actual results to differ materially from what appears in this news release. These factors include, but are not limited to: 1) CSG’s ability to continue to perform satisfactorily and maintain good customer relations with its four largest clients, Comcast Corporation, Echostar Communications, Time Warner, Inc., and Charter Communications, which combined make up approximately 70% of CSG’s revenues; 2) the continued acceptance of CSG’s Advanced Convergent Platform and its related products and services; 3) CSG’s ability to enhance current products and develop new technology that will retain existing clients and capture new market share; 4) significant forays into new markets, which may prove costly and unprofitable; 5) the degree to which CSG’s expectations of market penetration and consumer acceptance of advanced IP services prove true — and even if realized, CSG’s ability to meet the billing and customer care needs of those markets; 6) client consolidation, which has decreased the number of potential buyers for many of CSG’s products and services; 7) CSG’s ability to renew contracts and sell additional products and services to existing and new clients; 8) CSG’s ability to successfully deliver on lengthy and/or complex implementation projects, which by their nature, carry much more risk; and 9) CSG’s ability to successfully integrate and manage acquired businesses or assets in order to achieve the expected strategic, operating and financial goals established for such acquisitions. This list is not exhaustive and readers are encouraged to review the additional risks and important factors described in CSG’s reports on Forms 10-K and 10-Q and other filings made with the SEC.

For more information, contact:

Media Relations:

Elise Brassell

CSG Systems

Phone: (303) 804-4962

E-mail: elise_brassell@csgsystems.com

Investor Relations:

Roger Metz

CSG Systems

Phone: (303) 804-4082

E-mail: roger_metz@csgsystems.com

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