TTC Introduces the T-BERD HDSL Doubler Power Supply for use with the T-BERD 209OSP.

GERMANTOWN, Md.--(BUSINESS WIRE)--June 26, 1997--

Product helps eliminate problems for successful turn

up of HDSL networks

TTC(R), a Dynatech Company (NYSE:DYT), announced Thursday the availability of the T-BERD(R) HDSL Doubler Power Supply for use in the turn-up and testing of HDSL loops.

The HDSL Doubler Power Supply works in concert with the T-BERD(R) 209OSP Analyzer to provide a complete testing solution for the installation of HDSL networks.

With the emergence of HDSL doublers, service provider technicians are often required to test HDSL loops before the installation of the HDSL network equipment. This test is typically performed to verify that the cable pairs can support HDSL traffic and that the doubler is

Supply provides this capability by accessing the span at the main distribution frame (MDF) and emulating the HDSL Transmission Unit at the CO.

Combined with the T-BERD 209OSP, the HDSL Doubler Power Supply allows the technician to turn up HDSL spans and detect physical cable faults such as bridge taps, load coils, and bad repeaters. Eliminating the problems up front allows for the successful turn up of HDSL networks.

The T-BERD HDSL Doubler Power Supply enables the user to plug in any HTU-C card with a standard 220 back plane, making it compatible with equipment from all major HDSL vendors. In addition, the HTU-C card performs the T1-to-HDSL conversion and supplies the appropriate span power. Finally, the T1 interface jacks on the front panel allow for BER testing with the T-BERD 209OSP.

The T-BERD 209OSP is the premier analyzer for outside plant technicians. Combining T1, ISDN, DDS BERT, TDR, and DVOM, the T-BERD 209OSP is a complete tool for qualifying and troubleshooting digital loops. The T-BERD 209OSP also has pre-programmed HDSL loopcodes to allow for easy sectionalization of the span.

The instrument is battery powered, field rugged, lightweight and incorporates the ease-of-use features synonymous with the T-BERD name, including automated testing with the push of a button.

The TTC HDSL Doubler Power Supply costs $995 and is currently available for shipment.

TTC(R), a Dynatech Company (NYSE:DYT), is a global leader in the design, manufacturing, and marketing of test instruments, test systems and support services to help communications providers and users install and maintain successful networks.

Known for its T-BERD(R) and FIREBERD(R) analyzers, TTC provides testing solutions for ATM, ISDN, Frame Relay, Wireless, SDH, and SONET technologies. TTC also meets its customers' needs through extensive training courses and technical assistance.

Headquartered in Germantown, TTC has offices and distributors worldwide and is accessible via the Internet at http://www.ttc.com , toll free at 1-800-638-2049, or 301-353-1550. -0-

     Acronyms
     OSP - Outside Plant
     HDSL - High Bit Rate Digital Subscriber Line
     CO - Central Office
     HTU - HDSL Transmission Unit
     ISDN - Integrated Services Digital Network
     DDS - Digital Data Services
     BERT - Bit Error Rate Test
     TDR - Time Domain Reflectometer
     DVOM - Digital Volt Ohmmeter

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Information in this release applies specifically to products available in the United States. Product availability, price, and specifications may vary in non-U.S. markets.

CONTACT: TTC

Rob Clark, 301/353-1560 X2184

[e-mail]