Centillium Communications Partners With Sumitomo Electric

 Industries to Bring a Full Range of DSL 
Solutions to Japan  
Business Editors/High-Tech Writers  
FREMONT, Calif.--(BUSINESS WIRE)--March 6, 2001--   
Sumitomo Electric Utilizes Centillium CopperFlite Chipsets In  
Leading Edge MegaBit Gear CU4000 DSLAM  
Centillium Communications, Inc. (Nasdaq:CTLM), innovator of 
broadband communications technology, today announced a partnership 
with Sumitomo Electric Industries (SEI) to provide a full range of DSL 
technology to carriers in Japan. SEI recently announced availability 
of its MegaBit Gear(TM) CU4000 DSLAM, which supports multi-mode ADSL 
(Annex A and C) and symmetric DSL (Annex H) for Japan and throughout 
the world. Centillium's CopperFlite multi-mode chipset, which is the 
only DSL chipset that conforms to the Annex C and H standards for 
Japan, is the basis for the CU4000 product.  
Annex C addresses the unique requirements for operating with 
Japan's existing telecommunications network, where time compression 
multiplexing integrated services digital network (TCM-ISDN) is widely 
deployed. The prevalence of ISDN service significantly increases the 
adverse effect of crosstalk from other lines in the loop bundle, a 
serious barrier for the wide deployment of ADSL in such environments. 
Centillium's innovative and patented technology is the foundation of 
the Annex C standard that overcomes the crosstalk problem and enables 
Japanese carriers to deploy DSL in the same bundles that contain ISDN.  
Centillium's Annex H solution, which also addresses the unique 
network characteristics in Japan, provides symmetric DSL for customers 
requiring greater bandwidth upstream than is available in typical ADSL 
services. Centillium's technology features support for multiple 
embedded 64 kbps channels carried on a single DSL line, which can be 
used for applications such as channelized voice over DSL (CVoDSL) and 
ISDN over DSL.  
SEI's MegaBit Gear CU4000 Series DSLAMs are scalable, high 
capacity, standards-based platforms that can accommodate up to 480 
lines in a 23-inch wide chassis. Utilizing the latest ATM technology, 
the CU4000 series offers service providers extensive bandwidth 
management capabilities and network accessibility. With integrated, 
front-access shelves, the CU4000 series greatly improves system 
maintainability. Additionally, the CU4000 series provides superior 
reliability by offering redundancy for the DSL lines, high-speed 
uplinks and ISDN clock cascade connection.  
"With Centillium's network-proven CopperFlite chipsets, SEI has 
been able to quickly provide world-class DSL solutions to carriers in 
Japan," said Hideo Takahashi, vice president of Business Development, 
Sumitomo Electric U.S.A., Inc. "The relationship we have with 
Centillium has helped us build a strong position in the DSL market in 
Japan and throughout the world."  
The CU4000 series features full support for international 
standards of ADSL, including G.lite (Annex C), full rate and 
symmetrical DSL for Japan (Annex C and H), the United States (Annex 
A), and throughout the world (Annex A). Centillium's CopperFlite 
chipset features support for all these standards, making the unique 
technical functions available for SEI's leading edge equipment 
"We're thrilled to continue this strong relationship with SEI by 
providing full rate Annex C and Annex H ADSL chipsets for the CU4000 
platform," said Dori Braun, vice president, Access Business Unit, 
Centillium Communications, Inc. "Japan's ADSL market is strong, and we 
look forward to continuing to support SEI in their market leadership 
into the future."  
About Sumitomo Electric Industries  
With offices located around the globe, SEI is recognized as one of 
the pioneers in xDSL technology development. With its early entry into 
market, the company has been able to accumulate a wealth of technology 
and deployment experience. SEI's xDSL products "MegaBit Gear" series, 
including both CPE and Central Office equipment have been widely 
adopted by various telecommunications companies in Japan and abroad. 
To date SEI has shipped over 100,000 lines worth of xDSL equipment, 
thereby earning itself the top spot among Japanese manufacturers. 
Additional information is available at www.megabitgear.com.  
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 
line cards, and customer premise equipment for Digital Subscriber Line 
(DSL), premise networking and Voice-over-Packet. Centillium 
Communications, Inc. is 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.  
Note to Editors: Centillium Communications and the Centillium logo 
are trademarks of Centillium Communications.  
All other products or service names mentioned herein are the 
property of their respective owners. 
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