TTC introduces new jitter features to the INTERCEPTOR 1402S SDH/PDH Communications Analyser.

GERMANTOWN, Md.--(BUSINESS WIRE)--May 22, 1997--TTC(R), a Dynatech Company (NYSE:DYT), announced Thursday the addition of new jitter testing options to the INTERCEPTOR(R) 1402S SDH/PDH Communications Analyser.

TTC has added fully-digital PDH/SDH Jitter Generator and PDH/SDH Jitter Analyser options to the INTERCEPTOR 1402S. These options provide highly-accurate jitter analysis in order to verify compliance with ITU-T specifications for jitter control.

As networks evolve from PDH to SDH, the complexity of network synchronisation has drastically increased. Pointer movements caused by improper synchronisation have become the major cause of jitter in demuxed PDH tributaries. In addition, the nature of jitter has changed from periodic to bursty with higher amplitude.

Excessive jitter degrades the performance of the network by introducing bit errors in the digital signals which can cause loss of data. In order to guarantee the quality of services, it is critical to minimise jitter to levels accepted by ITU-T standards.

"TTC's INTERCEPTOR 1402S provides a complete solution for combating jitter in SDH/PDH networks," said Sally Qiu, product marketing engineer, TTC.

"The INTERCEPTOR 1402S jitter generation and jitter measurement modules use state-of-the-art digital implementation which provides greater accuracy in the measurement of jitter in SDH networks. Older analogue designs are no longer adequate since they are unable to respond quickly enough to track the bursty nature of pointer-induced jitter."

The INTERCEPTOR 1402S is a comprehensive PDH/SDH tester, with VC12, VC3, and VC4 mapping; full Mux/Demux among all rates supported to include N x 64kbit/s; performance analysis per G.821/G.826 and M.2100/M.2101; Automatic Protection Switch testing; optical power, insertion loss, and return loss measurements; and remote control capability.

With the addition of jitter testing capability, the INTERCEPTOR 1402S provides a powerful tool for equipment verification, network installation and maintenance.

The two new jitter options are field upgradeable and will be available for shipment July 1997. The PDH/SDH Jitter Generator option cost $4,995 (US) and the PDH/SDH Jitter Analyser option cost $5,995 (US). (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.)

TTC(R), a Dynatech Company (NYSE:DYT), designs, manufactures, and markets communications test products and systems. Known for its line of FIREBERD(R), INTERCEPTOR(R) and T-BERD(R) analysers, TTC develops internetwork analysers, multi-function communications analysers, ANSI and ETSI standard test instruments, integrated network test systems, and fiber optic test equipment.

In addition, TTC offers extensive training courses on products and related technologies, as well as on-site technical support, and is a member of ITU-T, ANSI T1, ATMF, FRF, and NMF. The company's U.S. headquarters are in Germantown, and its European headquarters are in Reading, Berkshire, UK.

TTC has offices and distributors worldwide and can be reached at 301/353-1550 (US) or through the Internet at http://www.ttc.com .

CONTACT: TTC, Germantown

Rob Clark, 301/353-1560 x2184

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