Copper Mountain Named No. 1 Worldwide in Business DSL and SDSL.

PALO ALTO, Calif.--(BUSINESS WIRE)--July 19, 1999--

Report from Gartner Group's Dataquest Confirms that Copper

Mountain Networks Dominates both Business DSL and SDSL 

Worldwide

Copper Mountain Networks, Inc., (Nasdaq:CMTN) today announced that it was ranked number one worldwide in the market for business DSL (Digital Subscriber Line) in 1998.

A report issued on July 12 by Dataquest shows that in 1998 Copper Mountain ranked first overall in shipments of business DSL central office (CO) ports, accounting for 29.5 percent of the world market. The business DSL market encompasses both the Symmetric DSL (SDSL) and ISDN DSL (IDSL) market segments. According to the report, the company was number one in SDSL ports shipped, with a 32.4 percent market share in that category, and number two in IDSL ports shipped with a 24.6 percent share. This news comes on the heels of another report issued by the Dell'Oro Group on May 24 that also ranked Copper Mountain number one in business DSL.

"This year's Worldwide xDSL Market Share and Forecast supports the increase in broadband access worldwide, with Copper Mountain leading the way in business DSL," said Kathie Hackler, principal analyst, remote and Internet access telecommunications, Dataquest (San Jose, Calif.).

"The Dataquest report is another significant indication of Copper Mountain's market leadership," said Rick Gilbert, president and CEO of Copper Mountain. "It is an honor to be recognized by such a prominent analyst firm as number one in business DSL worldwide. We could not have attained this leadership ranking without such an outstanding customer base or the continuing efforts of our employees and partners."

Dataquest Study Ranks Copper Mountain No. 1 by Central Office

Ports Shipped

Dataquest's "Worldwide xDSL Market Share and Forecast 1999" report states that the number of CO ports shipped in the business DSL equipment market totaled 218,300 in 1998, and that Copper Mountain shipped 64,400 ports, or 29.5 percent of total ports shipped. In 1998, Dataquest estimated that total SDSL ports shipped were 137,200 and that Copper Mountain's share was the largest with 44,400 ports, or 32.4 percent. Similarly, the report cited that Copper Mountain also sold 24.6 percent, or 20,000, of the total 81,100 IDSL ports shipped.

Copper Mountain's success is based on its family of CopperEdge(tm) DSL concentrators -- deployed nationwide -- which allow carriers to deliver value-added DSL networking services through a high-performance, carrier-class platform designed to scale in speed, capacity, and functionality without increasing configuration complexity or management overhead. With CopperEdge solutions, carriers can satisfy the ever-increasing user demand for bandwidth while generating a high return on investment, in both the CO and the Multi-Tenant Unit (MTU) environments.

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 range of high-performance, cost-effective DSL services 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(tm) 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 [phone], 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. 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 to, risks related to market acceptance of the company's products and our ability to keep pace with rapidly changing product requirements. 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.

Copper Mountain and all Copper Mountain product names are trademarks of Copper Mountain Networks, Inc. Other brand and product names are trademarks of their respective holders.