Copper Mountain Networks and Sphere Communications Announce End-to-End Solution for Cost-Effective In-Building Voice Over DSL.

Business Editors/High-Tech Writers

Fall ISPCON 2000

Booth No. 1342

SAN JOSE, Calif.--(BUSINESS WIRE)--Nov. 8, 2000

Interoperability Between Copper Mountain's DSL Access Solutions and Sphere's Voice Platform Eliminates Need for Expensive PBX Hardware for

Multi-Tenant Unit DSL Voice Service Subscribers

Copper Mountain Networks, Inc. (Nasdaq:CMTN), a leading provider of Digital Subscriber Line (DSL) solutions for business and residential users, and Sphere Communications Inc., a privately held leader in enterprise multimedia softswitch technology, today announced an end-to-end Voice over DSL (VoDSL) solution for broadband providers serving multi-tenant unit (MTU) office buildings.

Interoperating with one another, Copper Mountain's industry-leading Internet Protocol (IP)-optimized DSL access technology and Sphere's call-control technology will enable multi-line voice service over DSL without expensive PBX hardware.

(Note: The joint solution is being demonstrated at ISPCon 2000 this week in the Copper Mountain booth, No. 1342).

"This is the first true, end-to-end, multi-line VoDSL solution for the MTU market space," said Manish Goel, vice president of corporate development at Copper Mountain Networks. "The combination of Copper Mountain's packet voice technology and Sphere's advanced call-processing solutions enables DSL providers to deliver toll-quality voice services that are very compelling for MTU business customers from a cost perspective."

"DSL broadband providers must be able to cost-effectively provision, scale and manage converged voice and data services to be competitive going forward," said Frank Brletich, president at Sphere Communications. "Service providers can now meet this challenge in the MTU market with a complete package that combines the proven flexibility and the provisioning and scalability advantages of Copper Mountain's DSL access technology with Sphere's converged voice and data solutions."

About the Copper Mountain/Sphere End-to-End MTU VoDSL Solution

The Copper Mountain/Sphere end-to-end, MTU VoDSL solution integrates Copper Mountain's CopperEdge(R) 150 DSL Concentrator and CopperRocket(R) 201 Symmetric DSL (SDSL) CPE with Sphere Communications' Sphericall(TM) Softswitch call manager, VBX PhoneHub and VBX COHub media gateways, to support toll-quality voice communications over both IP and ATM networks. Within buildings, providers connect customers' phone lines to a Sphericall PhoneHub media gateway, which forwards voice traffic in Internet packets across a Local Area Network (LAN) to a CopperRocket 201. The CopperRocket 201 in turn forwards voice and data traffic to the CopperEdge 150, installed in a building-basement wiring closet. The CopperEdge 150 aggregates and prioritizes voice and data traffic and sends it across the Metropolitan Area Network (MAN) to an ATM switch, located in the provider's network operations center (NOC). The ATM switch splits the voice and data traffic, forwarding the data traffic to an Internet router and the voice traffic to the Sphericall Softswitch, also located at the NOC. The Softswitch, which provides all the functions of a more expensive Class 5 circuit switch, routes on-net voice traffic to other phones on the customer's LAN, via the ATM switch and the CopperEdge 150 DSL Concentrator, and off-net traffic to the Public Switched Telephone Network (PSTN) via a Sphericall COHub at the NOC. Value-added services such as unified messaging, fax, desktop call control, video telephony and attendant features are all part of the solution offering. This allows providers to have competitive differentiators that also are potential revenue sources in one solution. The Copper Mountain/Sphere end-to-end VoDSL solution leverages customers' standard network infrastructure to deliver all the functionality of a high-end PBX system, at significantly lower cost.

About Sphere Communications

Sphere is the leader in enterprise multimedia softswitch technology, providing customers with voice, video and data communications solutions on multi-service networks. Shipping products to satisfied customers for five years, Sphere Communications was the first company ever to install network-based PBX systems, and today has many customer sites supporting thousands of users. Sphere Communications is committed to developing and marketing open, standards-based communications software enabling customers to make technology investments today that will grow with their needs and provide long-term returns. For more information about Sphere, visit the company's World Wide Web site at http://www.spherecom.com.

About Copper Mountain Networks

Copper Mountain Networks, Inc. (Nasdaq:CMTN) manufactures DSL equipment for central office, digital loop and multi-tenant unit (MTU) broadband networks worldwide. Its DSL solutions enable carriers and service providers to deliver cost-effective, high-performance data and voice services over existing copper telephone wiring. Its CopperEdge(R) 200 DSL Concentrator is deployed in some of the world's largest public networks, and its environmentally hardened CopperEdge(R) RT (remote terminal) DSL Concentrator extends the reach of DSL to the millions of customers served by digital loop carriers (DLCs). Copper Mountain's OnPrem(TM) MTU Concentrator offers a cost-effective and scalable platform for MTU service providers. With IP IQ(TM), Copper Mountain's robust Internet Protocol (IP) service intelligence, service providers can maximize bandwidth utilization, support value-added broadband services and scale to meet the demands of hundreds of thousands of subscribers. Copper Mountain's CopperRocket(R) CPE family and CopperCompatible(R) program ensure that Copper Mountain DSL concentrators are interoperable with the broadest range of customer premise equipment (CPE). Customers wanting more information about Copper Mountain products or office locations worldwide can contact Richard Washbourne at 1-650/687-3380 or visit the company's World Wide Web site at http://www.coppermountain.com. For investor relations information, call toll free 1-877/INFO-CMTN (463-6268) or contact the company at [e-mail].

Portions of this release contain forward-looking statements regarding future events and are subject to risks and uncertainties, such as factors which could affect future revenue and earnings. Copper Mountain wishes to caution you that there are some factors that could cause actual results to differ materially from the results indicated by such statements. These factors include, but are not limited to: rapid changes in the service provider landscape and among our CLEC customer base, quarterly fluctuations in operating results attributable to the timing and amount of orders for our products, factors affecting the rate of DSL deployment by our customers, market acceptance of our products, the concentration of our revenue in a small number of customers, our ability to penetrate the international, multi-tenant unit (MTU) and the incumbent telecommunications service provider (ILEC/IXC) market, risks related to integrating the operations and products of OnPrem Networks with our own operations and product offerings, risks related to our rapid growth, our ability to keep pace with rapidly changing product requirements, and factors affecting the demand for DSL technologies. We refer you to the documents Copper Mountain files from time to time with the Securities and Exchange Commission, specifically the section titled Risk Factors in our Annual Report on Form 10-K for the year ended December 31, 1999 and other reports and filings made with the Securities and Exchange Commission.

Note to Editors: Copper Mountain and all Copper Mountain product names are trademarks of Copper Mountain Networks, Inc. All other marks are the property of their respective owners.