ADTRAN Introduces Industry's First Wireless Spread Spectrum Repeater for Unlicensed Microwave; Wireless Connectivity Made More Efficient and Economical with ADTRAN's TRACER BDR 2400.

HUNTSVILLE, Ala.--(BUSINESS WIRE)--April 19, 1999--

ADTRAN, Inc. (Nasdaq:ADTN), today announced its new wireless Bi-Directional Repeater 2400 (BDR 2400), to be unveiled at the IWCE tradeshow next week in Las Vegas. The BDR 2400 allows ADTRAN's T1 or E1 TRACER(R) systems to transmit over and around microwave path obstacles, cutting the cost of additional equipment required for a repeated circuit by as much as 50 percent. Previously, obstacles to wireless signals were dealt with by deploying complete back-to-back radio systems. By combining two transceivers into one housing, TRACER can now relay voice and data through just one repeater, saving valuable networking dollars.

"This breakthrough in wireless extension eliminates the redundant signal processing required to do back-to-back signal relays," said Dan Pritchett, ADTRAN Director of Sales and Marketing Wireless Products. "Once again, ADTRAN is providing carriers the most innovative and cost-effective solutions for real-world deployment opportunities. With our new BDR 2400 repeater, wireless connectivity becomes a more viable solution for point-to-point deployment scenarios."

ADTRAN's TRACER features direct sequence, spread spectrum digital technology for point-to-point wireless connectivity. TRACER operates in the 2.4 GHz band, license-free in the U.S. and many foreign countries. The TRACER product line is available in mastmount and rackmount configurations to provide E1 or dual T1 communication links. TRACER is available in the U.S. through ADTRAN-certified resellers or master distributors. TRACER is also available through ADTRAN international sales offices and worldwide distributors.

About ADTRAN

Established in 1985, ADTRAN, Inc. is a leading provider of network deployment and access solutions for delivering today's digital telecommunications services over existing copper infrastructures. Today, 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, xDSL, ISDN, and wireless transport. In the carrier and enterprise markets, ADTRAN produces a complete end-to-end solution that provides the greatest network efficiency and lowest possible telecommunications costs.

According to Dataquest and IDC, ADTRAN holds revenue-leading positions in the Frame Relay/DDS, ISDN Extension and HDSL/T1/E1 network and access markets. ADTRAN customers include the Regional Bell Operating Companies, interexchange carriers, GTE, domestic independent service providers, corporate end users, international customers and original equipment manufacturers.

For more information, contact the company at 800/9ADTRAN (800/923-8726), 256/963-8000, or via e-mail at [e-mail]. On the web, visit www.adtran.com.