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

SIEMENS SELECTS CENTILLIUM'S ENTROPIA CHIP FOR DEPLOYMENT IN ITS ACCESSION INTEGRATED ACCESS PLATFORM

Entropia Delivers Highest Integration, Highest Density, Low- Power Consumption Voice Over Packet Solution to Bridge Circuit-Switched and Packetized Voice Networks

FREMONT, Calif., November 13, 2000 - Centillium Communications, Inc. (Nasdaq: CTLM), innovator of broadband communications technology, today announced that Siemens Carrier Networks, LLC, a subsidiary of Siemens Information and Communication Networks, Inc.- a leading provider of integrated voice and data networks - has selected Centillium's Entropia chip for deployment in its Accession integrated access platform. Accession is a next-generation integrated Digital Subscriber Line Access Multiplexer/ Digital Loop Carrier (DSLAM/DLC) and an element of Siemens' SURPASSú hiA family of carrier-class access gateways that provide voice and data access to the next generation packet-based networks.

Entropia is a high performance, high value communications engine that performs vital telephony and network processing functions to help bridge the PSTN and packet-based networks. Entropia utilizes Asynchronous Transfer Mode Adaptation Layer 1 (AAL1) and AAL2 in conjunction with a complete suite of telephony functions to bridge traditional POTS (Plain Old Telephone Service) voice, fax, and modem calls from the PSTN to data-optimized packet networks. Entropia's rich feature set includes compression, echo cancellation, tone detection and generation, voice activity detection (VAD), silence insertion descriptor (SID) support, and comfort noise generation (CNG). Entropia offers the highest level of integration and density coupled with a capacity of 336 voice channels per chip when simultaneously using PCM, AAL1 echo cancellation, VAD, SID, and CNG.

"Siemens' Accession paves the evolutionary path toward voice and data convergence by supporting both traditional narrowband and emerging broadband services on one platform," said Dr. Mohan Kinra, Director of Convergence Products, Centillium Communications, Inc. "Centillium's Entropia provides the pivotal link between these otherwise disparate networks, positioning our company at the center of convergence," added Babu Mandava, General Manager of Centillium's Network Business Unit.

"Our Accession products are designed to help carriers ease the transition from traditional circuit-based telephone networks to the packet-based networks of the future," said Stuart van Houten, Director, Broadband Access Business Unit, Siemens Carrier Networks LLC. "Entropia is a perfect complement for our Accession integrated access platform, which is designed to support both broadband and narrowband services with a single piece of equipment. Entropia offers the highest integration, highest density, feature-rich voice signal processing on a space- and energy-saving platform. This single chip solution enables Accession to serve high-density access gateway applications in next-generation packet-based networks. Entropia makes sense for our customers who are looking for revenue-ready networks."

About Siemens Information and Communication Networks, Inc.BR Based in Boca Raton, Fla., Siemens Information and Communication Networks, Inc., is a leading provider of integrated voice and data networks with a comprehensive portfolio of products and solutions for enterprises, carriers and service providers. Last year, the company's 7,000 U.S. employees generated sales of nearly $2 billion. Siemens Information and Communication Networks Inc. comprises Siemens Carrier Networks LLC, Siemens Enterprise Networks LLC and Optisphere Networks Inc.

Siemens Carrier Networks, LLC, is creating converged carrier-class networks incorporating the intelligence and reliability of real-time voice networks into packet based networks. Its open architecture allows a variety of new multimedia based services to be introduced quickly and independently across a variety of network platforms.

Siemens Information and Communication Networks Inc. is part of Siemens' Information and Communication Networks Group of Companies with many years of experience in consulting, planning, installing and operating converged networks. It is an integral part of Siemens AG, one of the world's largest electrical engineering and electronics companies with sales totaling more than $74 billion.

Siemens is a registered trademark of Siemens AG. For more information, visit the company's web site at www.icn.siemens.com. For Siemens product information, call 800-814-1680. Centillium Communications and the Centillium logo are trademarks of Centillium Communications. Copyright 2000 Centillium Communications, Inc. All rights reserved. All other products or service names mentioned herein are the property of their respective owners.

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.

Copyright 2003 Centillium Communications, Inc. All rights reserved. All other products or service names mentioned herein are the property of their respective owners.