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

CENTILLIUM INTRODUCES MULTI-MODE ADSL CHIPSET FOR CUSTOMER PREMISES EQUIPMENT FOR BUSINESS AND HOME

Full-Rate/G.lite ADSL Chipset Solution Supports Voice-Over-DSL for Toll-Quality Calls

FREMONT, Calif., April 3, 2000 - Centillium Communications today announced the availability of its first Full-Rate Asymmetric Digital Subscriber Line (ADSL) solution for Customer Premises Equipment (CPE). Aimed at such products as business routers and bridges, as well as consumer-oriented home gateways and set-top boxes, the CopperFlite™ Utopia chipset supports both Full-Rate and G.lite industry standards, including ITU G.992.1 (G.dmt), ITU G.992.2 (G.lite), and ANSI T1.413 Issue 2. This highly flexible solution enables network service providers to rollout different levels of services quickly and easily, thus enabling them to meet the diverse broadband requirements of both residential and business customers.

Centillium’s new CopperFlite CPE solution supports voice-over-Pulse Code Modulation (PCM) for uncompressed toll-quality voice services. This enables ISPs and data Local Exchange Carriers (LECs) to increase revenues by offering customers multiple data and voice service offerings. Because it does not require external memory or Voltage Control Crystal Oscillators (VCXOs), the CopperFlite solution can help dramatically reduce the total Bill of Material (BOM) costs for consumer-priced market segments.

The CopperFlite Utopia CPE chipset also supports the requirements of the Japanese ADSL market, making it the only proven and deployed solution that supports both Japan and the rest of world on a single platform. Annex C addresses the unique characteristics of copper loop plants in Japan that require different technology than loops in the United States (Annex A). By integrating Annex C support, Centillium provides modem manufacturers with flexibility, enabling them to design a modem solution for global markets.

"The network service providers that we survey tell us they have significant issues with infrastructure costs," said Beth Gage, DSL Consulting Director, TeleChoice, Inc. "Their business models improve dramatically whenever they can better utilize their existing infrastructures. This includes customer premises routers with ADSL connections that interoperate with existing central office equipment. Additionally, service providers need integrated voice products that utilize existing lines without requiring the installation of new copper plant."

"With G.lite and Full-Rate ADSL and toll-quality voice in a single low-cost solution, the CopperFlite Utopia chipset helps migrate the business router/bridge model to the consumer segment," said Dori Braun, director of marketing for CPE, Centillium Communications. "This product will enable manufacturers to design new gateways and set-top boxes for the residential market."

Centillium CopperFlite CPE Chipset Solution
Centillium's CopperFlite Utopia CPE chipset delivers a complete Multi-Mode ADSL modem with just two chips, significantly reducing the form factor, power-usage, component count, and BOM costs normally associated with broadband access devices.

In Full-Rate ADSL mode, CopperFlite enables end users to connect to the Internet at speeds over 8.192 Mbps downstream and 1024 kbps upstream, depending on the loop and the reach conditions, and complying with G.992.1 standards. In G.lite ADSL mode, CopperFlite supports connection rates up to 1.536 Mbps downstream, and up to 512 kbps upstream, complying with G.992.2 standards. Interoperability with both Full-Rate and G.lite central office equipment has been verified in multi-vendor environments.

The highly flexible CopperFlite platform makes it easy for DSL systems manufacturers to design CPE for both mass-consumer and business markets. CopperFlite dramatically reduces hardware engineering and software development efforts by including a suite of reference designs, system code, and software for turnkey designs.

The new CopperFlite Utopia chipset solution also helps reduce the need for infrastructure investment by network service providers. CopperFlite interoperates with every type of ADSL equipment that can be found in a central office, including G.lite and Full-Rate DSLAMs. This allows service providers to leverage their existing network infrastructure for higher profitability

Availability
The Centillium CopperFlite CPE chipset is available for sampling immediately. Part numbers are as follows: CT-L50ST81 conforms to G.992.2 and G.992.1 Annex A ; CT-L60ST81 conforms to G.992.1 Annex A and G.992.2 Annex A and C.

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 Annual Report on Form 10-K and most recent Quarterly Report on Form 10-Q, available for viewing on 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.