Centillium Communications, Inc.

Laurie Falconer
Centillium Communications, Inc.
(510) 771-3647
[email protected]

SIEMENS SELECTS CENTILLIUM'S OCTAL MULTI-MODE ADSL CHIPSET FOR NEXT GENERATION DIGITAL LOOP CARRIER PLATFORM

Centillium and Siemens Partner in Offering Next-Generation Services to Carriers

FREMONT, Calif., February 20, 2001 - Centillium Communications, Inc. (Nasdaq: CTLM), innovator of broadband communications technology, today announced that Siemens has selected its CopperFlite octal port multi-mode Asymmetric Digital Subscriber Line (ADSL) chipset for deployment in its leading Next Generation Digital Loop Carrier (NGDLC), Accession™, which is designed to integrate narrowband and broadband services on a single shelf at the access point of the network.

"At least 30 percent of target ADSL subscribers are served by DLCs today, so it is imperative that companies such as Centillium and Siemens address the needs of this market," said Adam Guglielmo, DSL Analyst, TeleChoice, Inc. "We expect to see a very large percentage of new homes and businesses utilizing telecommunications services through DLCs or NGDLCs in the near future, so the importance of this technology for providing broadband services is underscored"

"In addition to the central office co-location deployment scheme, broadband access can be offered effectively using remote platforms such as DLCs," said Dori Braun, VP of Marketing, Access Business Unit at Centillium. "Our highly integrated, low-power, multi-mode ADSL chipset solution is optimized on services to bring substantial value for DLC platforms."

"Carriers are looking for practical solutions that help them make the most of their existing investment while developing plans for migration to new generation access platforms," said Derek Underwood, Director Broadband Access Product Management, Siemens Carrier Networks LLC. "Centillium's CopperFlite multi-mode chipset enables us to achieve industry leading port density and focus on value-add services offered by our Accession platform."

The octal-port CopperFlite chipset is fully pin-to-pin and software compatible with Centillium's quad-port CopperFlite solution and octal-port CopperLite™ solution. Each port can be individually configured to support industry standards, including annexes A, B, C, and H. The octal-port CopperFlite supports multiple Permanent Virtual Circuits (PVCs) for Voice-over-DSL (VoDSL) applications with quality of service support and channelized voice-over-DSL (CVoDSL) for transporting uncompressed toll-quality voice in conjunction with Asynchronous Transfer Mode (ATM) traffic. As a result, Internet Service Providers (ISPs) and data carriers can increase revenues by offering customers combined data and voice services.

About Siemens
Based in Boca Raton, Fla., Siemens Information and Communication Networks, Inc., with its subsidiaries -- Siemens Carrier Networks LLC, Siemens Enterprise Networks LLC and Optisphere Networks Inc., is a leading provider of integrated voice and data networks and solutions for enterprises, carriers and service providers.

Siemens AG, headquartered in Berlin and Munich, Germany, is a leading global electrical engineering and electronics company, employing over 447,000 people in 193 countries, with sales in excess of $75 billion worldwide in fiscal 2000. The United States is the largest market for Siemens globally. In the U.S., Siemens employs more than 73,000 employees and achieved sales of more than $17.1 billion in fiscal 2000. Siemens' U.S. businesses are leaders in the information and communication, healthcare, energy, industry, financial services, transportation and lighting sectors.

About Centillium Communications
Centillium Communications, Inc. is combining technical innovation and customer commitment to make broadband communications a market reality. Centillium consistently delivers value to its customers by providing broadband networking systems for applications across all market segments. The company designs and markets communications chipset solutions for central office equipment, digital loop carrier (DLC) line cards, and customer premise equipment for Digital Subscriber Line (DSL), Voice over Packet (VoP) and Premise Networking. The Centillium Communications headquarters are located at 47211 Lakeview Blvd., Fremont, CA 94538. Additional information is available at www.centillium.com.

Forward Looking Statements
Except for historical information contained in this press release, the foregoing contains forward-looking statements that involve risks and uncertainties. Actual results may differ materially from those indicated by such forward-looking statements based on a variety of risks and uncertainties, including the risks and uncertainties relating to actual quantities and timing of any orders received under the contract and the successful development and market acceptance of Centillium's new products. The company assumes no obligation to update these forward-looking statements to reflect events or circumstances after the date hereof. Information about potential factors that could affect Centillium's financial results is included in Centillium's most recent Quarterly Report on Form 10-Q, which can be viewed at the Securities and Exchange Commission's website at www.sec.gov.

Centillium Communications and the Centillium logo are trademarks of Centillium Communications.