3Com Teams With Copper Mountain Networks to Add Carrier-Class DSL Concentrators to CommWorks Architecture and Product Portfolio - Company Business and Marketing

Cambridge Telcom Report, March 27, 2000

- Tier 1 - Media Processing The media processing layer employs media gateway functions to integrate multiple types of traffic and accommodate disparate access networks. This tier features 3Com's proven Total Control multiservice access platform. The new Total Control 500 DSL Access Multiplexer also resides in the media processing layer of the CommWorks architecture.

- Tier 2 - Signaling and Call Control The call control layer bridges different signaling and call control protocols enabling multimedia traffic to seamlessly traverse disparate networks, like the public switched telephone network (PSTN) and IP network.

- Tier 3 - Service Creation The service creation layer provides an open service creation environment that leverages open interfaces and 3Com strategic partners to enable rapid application and service deployment.

With open interfaces at every tier, service providers can quickly develop differentiated enhanced services to take a lead in this market. 3Com developed the CommWorks architecture in a standards-based environment designed to drive the evolution of IP-offerings through partnerships that will provide the variety of building blocks for the next-generation of carriers. Rather than performing expensive forklift upgrades, the CommWorks architecture lets service providers leverage their existing infrastructure and migrate to a packet-based network that offers converged, IP-based enhanced services. The three-tier packet-based architecture enables service providers to customize solutions independently at each tier to address individual customer needs.

Copper Mountain Networks, Inc., (Nasdaq: CMTN) develops and markets a comprehensive family of DSL solutions that enable high-speed internetworking over existing copper facilities. The company's mission is to enable carriers and other service providers to offer a full range of high-performance, cost-effective data and voice services over DSL that are easy to deploy, use, and manage. Copper Mountain's CopperRocket CPE family addresses the bandwidth, reliability, ease-of-use, and cost concerns of remote offices and users. Its carrier-class CopperEdge DSL concentrators and CopperView network management solutions offer a robust and scalable platform for carriers and multi-tenant-unit service providers to generate a high return on investment while satisfying the ever-increasing user demand for bandwidth. Customers wanting more information about Copper Mountain products can contact Diana Helfrich at (650) 687-3314 or visit the company's World Wide Web site at http://www.coppermountain.com. For investor relations information, call toll free 877-INFO-CMTN (463-6268) or contact the company at IR@coppermountain.com.

With more than 300 million customer connections worldwide, 3Com Corporation connects more people and organizations to information and each other in more innovative, simple and reliable ways than any other networking company. 3Com delivers web-enabled solutions to consumers, small- to medium-sized business locations and network service providers. For more information, visit 3Com's web site @ www.3com.com.