TTC Announces the TTC 350E+ DSL Test Set; New ADSL Handheld Test Instrument Supports DMT, CAP and G.Lite Line Codes.

GERMANTOWN, Md.--(BUSINESS WIRE)--Sept. 22, 1999--

TTC today announced the commercial availability of the TTC 350E+ DSL test set.

The handheld ADSL instrument is the first of its kind to support CAP, DMT and G.Lite line codes for service providers around the world. This interoperable solution is based on ADI/Aware and GlobeSpan technologies, and supports Alcatel, Cisco, Lucent and Orckit systems.

The TTC 350E+ is TTC's entry-level tester for ADSL and complements TTC's other ADSL test sets including the TTC 1000 ADSL Analyzer. The TTC 350E+ is a lightweight, battery-powered unit designed for the field technician. The 350E+ is available in two versions: ATU-R and ATU-C.

By emulating the customer premises ADSL modem or ADSL transceiver unit-remote (ATU-R), the TTC 350E+ synchronizes with the DSLAM (ATU-C) and reliably reports critical service parameters, including connect speed (bits per second), line capacity, and noise margins.

With the advanced internal IP ping feature, technicians can verify connectivity to the network (for example, an ISP) without a PC. The field technician using this instrument can quickly verify service and complete a smooth installation. Using an ATU-C version at the exchange end of the loop and an ATU-R version at the premises end of the loop, cable pre-qualification can be conducted easily.

"TTC believes that the success of DSL will be driven in large part by industry and technology leaders bringing down installation and deployment costs through the availability of efficient turn-up service tools and systems," said Bob Vogel, president of TTC's TPI division, which developed the instrument.

"We are delighted to announce the commercial availability of such a solution. The TTC 350E+ DSL test set will enable service providers to quickly, accurately and efficiently turn up DSL service."

When equipped with an optional load coil detector lid, the TTC 350E+ DSL test set can locate up to five load coils out to 8,000 meters. It can identify open and shorted local loops, as well as excessive noise, to detect conditions affecting ADSL service. The test set also shows downstream and upstream connect speed and noise margin on an LCD display and LED sync.

The TTC 350E+ test set is currently available for commercial shipment. It is priced at U.S.$3,500.

TTC, a Dynatech company (OTC-BB: DYNA), designs and markets network analyzers, systems and software, and provides consulting services and technical training that enable optimized network performance. TTC offerings address the entire network lifecycle and allow customers to strengthen bottom-line performance and dramatically improve service to their customers.

With the widest range of products available in the test marketplace, TTC leads the industry in standards-compliant network management and service assurance software, centralized test-and-monitoring systems, and intelligent instruments.

Known for its T-BERD and FIREBERD analyzers, CENTEST centralized test systems and TPI handheld instruments, TTC customers include telecommunications service providers, enterprises and governments worldwide. Headquartered near Washington, D.C., in Germantown, Md., TTC is accessible via the Internet at www.ttc.com, or by calling 800-638-2049 or 301-353-1550.

TTC, T-BERD, FIREBERD and CENTEST are registered trademarks of TTC, a division of Dynatech, LLC. Product availability, price and specifications may vary in non-U.S. markets.

Glossary: ADSL - asymmetric digital subscriber line; ATU-R -- ADSL transmission unit-remote; CAP - carrierless amplitude phase modulation; DC - direct current; DMT - discrete multitone; DSL - digital subscriber line; IP - Internet protocol; LCD - liquid crystal display; LED - light emitting diode.

Customer and product-related inquiries should be directed to 800-638-2049 (U.S. only) or 301-353-1550. Inquiries from the media and industry analysts should be directed to Alice Ducq ([e-mail]) at 301-353-1560, ext. 3153.