ADTRAN launches Total Reach technology for faster, less costly deployment of ISDN digital services.

HUNTSVILLE, Ala.--(BUSINESS WIRE)--Feb. 28, 1996--ADTRAN, Inc. (NSDQ: ADTN) announced today a new technology, called Total Reach, designed to save Regional Bell Operating Companies (RBOCs) and other digital service providers millions of dollars in the deployment of popular digital service offerings, most notably ISDN.

ADTRAN Chairman and CEO Mark C. Smith stated: "ADTRAN's Total Reach can double the range of digital services, while significantly reducing costs of deployment and cutting down on response times for service activation."

"The Total Reach family of products uses ADTRAN's latest technological breakthrough called Simple Coded - Pulse Amplitude Modulation (SC-PAM) to extend digital services over one twisted pair of copper wires," ADTRAN Vice President of Engineering for Extended Range Products Steve Turner said.

The Total Reach ISDN products allow the extension of Basic Rate ISDN to distances of over 30,000 feet from the telephone company's central office without repeaters. Traditional deployment of ISDN to this range has previously required the use of ISDN repeaters, which regenerate the signal mid way through the transmission cycle. The Total Reach technology permits an extended range digital transmission by reducing the attenuation over the copper loop and increasing tolerance to noise.

ADTRAN's Total Reach products alleviate the need for much of the equipment, namely repeaters, associated with deploying ISDN to distances normally considered outside of the traditional limits. By eliminating the need for repeaters, service providers will find great cost reductions not only in equipment, but also in the installation and maintenance associated with previous methods of deployment for digital transmission services.

For many years, ISDN has reportedly been described as an expensive service primarily due to costs associated with the deployment of the service, especially to customers outside of the normal service area. The ADTRAN Total Reach solution will ease these expenses, ultimately allowing service providers to adjust tariffs accordingly. Typical ISDN applications include telecommuting, internet access and high-speed file transfer.

"Total Reach's vast economic and deployment benefits have the potential to greatly accelerate the build-out of ISDN by the RBOCs and other service providers," ADTRAN Vice President of Extended Range Products Sales and Marketing Tom Stanton said.

Total Reach pre-production units have been demonstrated at most of the RBOCs, who are now testing and evaluating the new technology.

ADTRAN was established in 1985 to design, develop and manufacture advanced transmission products for high-speed digital communications. In addition to its HDSL products, ADTRAN is a primary provider of DDS and ISDN digital loop products to Regional Bell Operating Companies and many well-known OEMs. The broad selection of customer premises products offered by ADTRAN includes a complete line of DSU/CSUs, a variety of ISDN extension and network terminating products and flexible T1 multiplexers. For more information regarding ADTRAN and its products, call 1-800-326-3700, fax [phone], or E-Mail: [e-mail]. ADTRAN can be found on the Internet at www.adtran.com.

CONTACT: ADTRAN, Inc., Huntsville

Heidi Goldstein, 212/316-3494

or Stacy Thomas, 205/971-8488