Copper Mountain and GoDigital Partner to Deliver Industry's First IDSL and Full-Service POTS on a Single Pair and a Solution Extending IDSL to More Than 100,000 Feet.

PALO ALTO, Calif.--(BUSINESS WIRE)--Aug. 16, 1999--

Carriers Can Now Cost Effectively Deliver Converged Voice

and Data Services to Telecommuter and Small-Business Markets

Copper Mountain Networks, Inc., (Nasdaq:CMTN) today announced breakthroughs in both the distance and efficiency of ISDN Digital Subscriber Line (IDSL) service delivery that will enable carriers to address the voice and data needs of the growing telecommuter and small-business markets.

Developed in partnership with GoDigital Telecommunications, Inc., one new solution extends the reach of IDSL to more than 100,000 feet, and a system option enables carriers to support high-speed data and full service POTS traffic over a single copper pair. For carriers, this eliminates the cost of running an extra pair of wires to deliver data services, while subscribers benefit from voice service that is not subject to service disruptions.

"Until now, IDSL was a data-only service, and lifeline POTS was strictly a separate-pair service for voice," says Richard Sekar, director of product marketing for Copper Mountain. "Through our partnership with GoDigital, we have developed an entirely new converged service for carriers to offer. Moreover, by extending the distance of IDSL so significantly, we enable carriers to reach more customers, including telecommuters and small businesses."

"By transporting data and full service POTS over a single pair of wires, carriers essentially can cut their loop infrastructure costs in half," said Ron Westfall, research analyst, Carrier Infrastructure, Current Analysis (Sterling, Va.). "In addition, extending the reach of IDSL allows them to take advantage of the estimated 23 million local loops that extend well beyond 18,000 feet. That's a significant market expansion potential."

"This combined IDSL/POTS over a single-loop solution will have enormous potential for both carriers and end users," said David Sanford, vice president of marketing for GoDigital.

"Prior to this, many end users wanting both high-speed data and POTS services could not get both because additional copper pairs weren't easily available in the network. In addition, customers wanting high-speed Internet access on very long loops had few real options, and none that were cost effective. With the new GoDigital/Copper Mountain solutions, these problems are solved quickly."

How the Systems Work

The new solutions employ Copper Mountain's CopperEdge(r) 200 DSL Concentrator, which is connected via IDSL lines to GoDigital's GDSL(r) Subscriber Carrier System in the central office (CO).

In the long-loop solution, up to three IDSL lines from the CopperEdge 200 DSL Concentrator are carried by GoDigital's GDSL(r) BRI 3 system on a single pair. Range is over 100,000 feet (depending on wire gauge) using line-powered repeaters and remote terminal units (RTUs) at a customer's telephone demarcation point.

Previously, an IDSL signal was limited to 18,000 feet or 36,000 feet with a mid-span repeater. All three IDSL lines can be dropped at the end of the system, or they may be dropped individually at the repeater locations.

With the IDSL-plus-POTS solution, an IDSL line from the CopperEdge 200 DSL Concentrator is integrated with POTS in GoDigital's GDSL(r) Plus system and transported in on a single pair. The POTS is delivered with full telephone-line power and supports all CLASS services.

In both the long-loop solution and the IDSL-plus-POTS solution, both Copper Mountain's CopperRocket(tm) 201 IDSL Customer Premises Equipment (CPE) and all third-party CopperCompatible(tm) IDSL CPE will automatically support the IDSL services.

Other Applications

This flexible new IDSL capability enables carriers to support several applications: -0-

--   Bandwidth bonding. If a small business requires bandwidth greater
     than 144 kbps, the carrier can use the GDSL's three-port CO
     terminal unit to inverse multiplex up to three IDSL circuits from
     the CopperEdge 200 on a single pair of wires. This allows the
     carrier to deliver up to 432 kbps of bandwidth on a single wire
     at distances up to 100,000 feet.

--   Add/Drop IDSL. Once a carrier has extended IDSL to the furthest
     point, it is simple to add more subscribers to the same circuit
     anywhere between the CO and the last drop by using an Add/Drop
     Repeater (ADR) and an RTU at the customer premise.

--   Add new DSL services. With the CopperEdge 200 DSL concentrator,
     carriers can introduce other DSL services in the future using the
     same chassis. As a small business customer grows, for example,
     the carrier can upgrade it to SDSL for symmetric bandwidth up to
     1.5 Mbps and high-speed, "always-on" connectivity.

-0-

Availability

The GoDigital/Copper Mountain solutions are available today.

About GoDigital

GoDigital Telecommunications, Inc. is a privately held company located in Fremont, California. GoDigital develops, manufactures and markets digital subscriber carrier systems that use high speed digital subscriber line (DSL) technologies and fiber to provide multiple voice and data channels, ISDN, IDSL, and high speed internet or LAN access.

For more information on the company and its products visit the Company's World Wide Web site at www.godigital.com. Customers wanting more information about GoDigital products can contact Kathryn Hernandez at 510/226-8289 or visit the web site at www.godigital.com.

About Copper Mountain Networks

Founded in January 1996 with offices in Palo Alto and San Diego, Calif., 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(tm) CPE family addresses the bandwidth, reliability, ease-of-use, and cost concerns of remote offices and users. Its carrier-class CopperEdge(r) DSL concentrators and CopperView(tm) 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 us at [e-mail].

This news release contains certain forward-looking statements that involve risks and uncertainties, including statements about new product features, market opportunity for new products, and the demand for voice services that may be offered by Copper Mountain's customers. Such statements are only predictions and the company's actual results may differ materially from those anticipated in these forward-looking statements. Factors that may cause such differences include, but are not limited risks related to rapidly changing product requirements, the introduction of new products, market acceptance of the Company's products, and reliance on strategic partners. These factors and others are more fully discussed under "Risk Factors" and elsewhere in Copper Mountain's Registration Statement on Form S-1 (No. 333-73153), as filed 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.