ADTRAN Announces Alliance with Copper Mountain to Deliver Interoperable Technologies in Voice Over DSL Market - Product Information

Cambridge Telcom Report, May 29, 2000

ADTRAN, Inc. (NASDAQ: ADTN) Tuesday announced an interoperability alliance with Copper Mountain Networks Inc. (NASDAQ:CMTN) to offer voice over DSL solutions to Competitive Local Exchange Carriers, Incumbent Local Exchange Carriers, and Inter-Exchange Carriers. ADTRAN's Total Access 850 integrated access device (IAD) and Copper Mountain's CopperEdge 200 DSL Concentrator deliver cost-effective, carrier-class access solutions to the voice over DSL market.

ADTRAN's Total Access 850 system is a next-generation carrier-class IAD that benefits communications providers who require a customer premises device to integrate voice and data functions. The Total Access system offers a complete, immediate, and easy-to-deploy solution allowing a seamless migration path from TDM-based applications services to SDSL and G.shdsl. Copper Mountain's CopperEdge 200 DSL Concentrator enables carriers and other service providers to offer high-performance data and voice services using DSL technology. It is the ideal platform for customers seeking increased return on investment via DSL service offerings.

"ADTRAN's strategy to interoperate with an industry leader such as Copper Mountain ensures broad integration and accelerates our commitment to offer powerful, cost-effective solutions to the rapidly expanding DSL market," said Everett Brooks, ADTRAN product line manager, competitive service providers.

"Copper Mountain is pleased to add ADTRAN's Total Access 850 IAD to our family of CopperCompatible devices for voice over DSL solutions," said John Nevius, CPE marketing manager at Copper Mountain Networks. "Ample IAD availability makes the Copper Mountain solution more attractive to service providers and carriers, and lets users with ADTRAN brand loyalty upgrade to voice over DSL using a brand they know and trust. By working with market leaders such as ADTRAN, Copper Mountain can help facilitate faster and broader market acceptance of DSL and the applications it powers."

The Total Access 850 system offers superior features and unparalleled flexibility, such as IP/IPX routing supporting Frame Relay and PPP, FXO and FXS interfaces for analog voice, and DSX-1 for digital voice. It also offers a V.35 interface for connecting with external routers or video-conferencing equipment.

The CopperEdge 200 DSL Concentrator is a carrier-class platform that supports multiple types of DSL concurrently, including ADSL, G.lite, IDSL, and SDSL. The CopperEdge provides bandwidth of up to 8 Mbps on a DSL line using a single copper pair. In addition, Copper Mountain's CopperEdge DSL concentrators support multiple services over DSL, including Internet access, toll-quality voice services, corporate virtual private networks (VPNs), and Frame Relay. This multi-service capability enables service providers to differentiate their service offerings, enhance revenues, and retain customers.

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. 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.

Established in 1985, ADTRAN, Inc. is a leading provider of deployment and access solutions for carrier and enterprise networks. ADTRAN technologies support more than two million local loops worldwide. More than 500 ADTRAN products support all major digital technologies, including T3, T1, E1, Frame Relay, DDS, HDSL, HDSL2, DSL, ISDN, wireless transport, and network management. According to Dataquest and IDC, ADTRAN holds revenue-leading positions in the Integrated Access, Frame Relay/DDS, ISDN Extension and HDSL/T1/E1 markets. ADTRAN customers include the Regional Bell Operating Companies, interexchange carriers, GTE, domestic independent service providers, Competitive Local Exchange Carriers, corporate end users, international customers, and original equipment manufacturers.

For more information, contact the company at 800 9ADTRAN (800/923-8726) or via e-mail at info@adtran.com. On the web, visit www.adtran.com.