ADTRAN Introduces New Comprehensive Product Line for Wireless Service Providers; New Line of Multiplexers Enables Cost-Effective Upgrade to Next Generation Services.

HUNTSVILLE, Ala. -- ADTRAN(R), Inc. (NASDAQ: ADTN), a leading provider of network access equipment, today announced three innovative wireless multiplexer solutions that allow both traditional voice and next-generation IP data services to be more effectively delivered within service provider networks.

To meet the need for speed and increased data transport that today's wireless customers demand, ADTRAN introduces the MX3112. This innovative multiplexer enables effortless Ethernet migration from traditional TDM voice circuits to EVDO or HSDPA data services. When paired with the OPTI-6100(TM) in the central office, the MX3112 completes an end-to-end solution allowing for optimized Ethernet backhaul across existing transport topologies in virtually any service provider network.

ADTRAN's new MX3208/3216 drop-and-insert multiplexers are designed to lower wireless carriers recurring cost by maximizing utilization of their wireline or microwave connections. The MX3208/3216 permits a single DS3 to be shared among multiple cell sites, reducing the cost of leased line DS3 backhaul services. Available in eight and sixteen drop port DS1 models, the MX3208/3216 features bandwidth managed IP/Ethernet and terminal server ports.

To maximize efficiency at the local cellular tower site, ADTRAN introduces the MX410, a cost-effective DS1/0 grooming solution for bandwidth management and remote access among multiple cell sites. The MX410 allows a DS1 to be cross-connected into separate fractional T1 facilities supporting multiple radios or management interfaces. The MX410 provides V.35 and Ethernet interfaces as well for support of legacy management interfaces.

"ADTRAN is well-respected for its innovative, cost-effective solutions addressing our customer's network access needs," states Jay Wilson, Vice President of Product Marketing for ADTRAN's Carrier Networks Division. "The addition of these three new wireless infrastructure solutions enables ADTRAN to service the growing demand for voice and data service convergence in wireless network applications equally as effective."

About ADTRAN

ADTRAN, Inc. is one of the world's most successful network access equipment suppliers, with a 17-year history of profitability and a portfolio of more than 1,300 solutions for use in the last mile of today's telecommunications networks. Widely deployed by carriers and enterprises alike, ADTRAN solutions enable voice, data, video, and Internet communications across copper, fiber, and wireless network infrastructures. ADTRAN solutions are currently in use by every major domestic service provider and many international ones, as well as by thousands of public, private and governmental organizations worldwide.

For more information, contact the company at 800 9ADTRAN (800 923-8726) or via email at [e-mail]. On the Web, visit www.adtran.com.