CENTILLIUM AND FLOWPOINT 
          DEMONSTRATE INTEROPERABILITY OF ADSL G.LITE PRODUCTS 
        
Centillium CopperLite 
          Chipset Interoperates with FlowPoint/Cabletron SSR255 Router 
        
          FREMONT, Calif., September 27, 1999 - Centillium Communications, 
          Inc. and FlowPoint Corporation, a wholly owned subsidiary of Cabletron 
          Systems (NYSE:CS), today announced that they have achieved end-to-end 
          interoperability between their Asymmetric Digital Subscriber Line (ADSL) 
          G.lite (G.992.2) products. The interoperability tests were conducted 
          at the InterOperability Lab, located on the campus of the University 
          of New Hampshire, where Centillium and FlowPoint are both members of 
          the multi-vendor ADSL Consortium.
          
          The test bed included the FlowPoint/Cabletron SmartSwitch Router (SSR255) 
          router and Digital Subscriber Line Access Multiplexer (DSLAM) line cards 
          based on Centillium's CopperLite CO chipsets. End-to-end interoperability 
          was confirmed with Web browsing at speeds of up to 1536kbps downstream 
          and 512kbps upstream over Plain Old Telephone Service (POTS) lines.
          
          "We are very pleased to announce end-to-end interoperability with 
          the FlowPoint/Cabletron SmartSwitch Router, one of the most popular 
          customer premises equipment solutions for small businesses, telecommuters, 
          and home offices," said Faraj Aalaei, co-founder and vice president 
          of marketing for Centillium.
          
          "Centillium's CopperLite chipset is being widely adopted by market 
          leading central office equipment makers," said Chuck Waggoner, 
          president of FlowPoint. "By achieving successful interoperability 
          with Centillium, the FlowPoint/Cabletron SmartSwitch Router can now 
          be confidently deployed by G.lite Network Service Providers using CopperLite-based 
          DSLAM line cards."
          
          
          Centillium CO Chipset 
          Solutions 
          The two-part 
          CopperLite CO (central office) chipset consists of the CT-L21DC08 
          Digital chip and CT-L21AC08 Analog chip. Networking equipment manufacturers 
          can use these high-performance, power-efficient chipsets as the foundation 
          for multi-port line cards in Digital Loop Carriers (DLCs), DSLAMs, and 
          other carrier-class network platforms.
          
          The CopperLite CO chipset is highly integrated and offers maximum port 
          density, supporting up to eight DSL ports with just two chips. Very 
          low power requirements help keep power dissipation to below 600 mwatts 
          per port. Another significant advantage of CopperLite is that its analog 
          chip integrates most of the external filtering (hybrid) typically reqired 
          by other ADSL chipsets, thereby reducing the normal hybrid-component 
          count by half.
          
          FlowPoint/Cabletron 
          SmartSwitch Router
          The FlowPoint/Cabletron 
          SmartSwitch Router (SSR255) supports both the consumer-focused universal 
          Asymmetrical Digital Subscriber Line standard (ADSL-G.lite) as well 
          as the full-rate standard (ADSL-G.dmt). The SSR255 router provides Network 
          Service Providers, Internet Service Providers, and end users with a 
          wide range of broadband access options. It utilizes Alcatel's DynaMiTe 
          DMT ADSL Issue 2-compliant chipset and firmware for modem-side functionality. 
          This ensures full interoperability between the Cabletron router and 
          carrier-class DSLAM equipment from multiple vendors, including Alcatel, 
          Cisco, Ericsson, NEC, Nortel, and Siemens.
          
          About FlowPoint
          FlowPoint 
          is a wholly owned subsidiary of Cabletron Systems that designs, manufactures, 
          and markets Digital Subscriber Line (DSL) network access products. The 
          Company's mission is to create superior-quality full-featured products 
          allowing seamless network integration for businesses and home offices 
          using the Internet and corporate Intranets. Founded in June 1993, FlowPoint 
          is headquartered in Santa Clara, California and distributes its products 
          worldwide through service providers, system integrators, distributors, 
          and private-label OEMs. FlowPoint can be found on the web at http://www.flowpoint.com 
          or call toll free at 1-888-867-4736.
          
          
          
          About Centillium Communications
          Centillium 
          Communications is a communication solutions company dedicated to delivering 
          high-speed Internet access to bandwidth-hungry businesses and consumers. 
          The company designs and markets Digital Subscriber Line (DSL) chipset 
          solutions for central office equipment, DLC line cards, and customer 
          premises equipment. Centillium's chipset family is the industry's highest 
          port density, lowest power dissipation solution available to networking 
          equipment manufacturers today. Additional information is available at 
          http://www.centillium.com. For sales information, contact Al Gharakhanian 
          at (510) 360-5054.
           
        
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©1999 Centillium 
          Communications, Inc. CopperLite is a trademark of Centillium Communications, 
          Inc. All other products or service names mentioned herein are the property 
          of their respective owners.