Symmetricom's TimeSource 3000 Primary Reference Source Receives GR-2830 Compliance Audit From Telcordia Technologies.

SAN JOSE, Calif.--(BUSINESS WIRE)--July 28, 1999--

Telcordia Technologies, Inc. (formerly Bellcore) has completed its audit of Symmetricom's TimeSource 3000 Primary Reference Source (PRS), according to a Symmetricom spokesman.

Telcordia Technologies Technical Audit Report, DA-1006, Volume 1, Issue 1, June 1999, entitled "Features, Functions and Performance of the Symmetricom TimeSource(TM) 3000," found that the TimeSource 3000 meets the performance requirements of GR-2830, "Primary Reference Sources: Generic Criteria." Some of the key compliance areas include: -0-

--   synchronization status messaging
--   long-term frequency stability of 1x10-11
--   wander performance meeting requirements of MTIE (mean timing
     interval error) and TDEV (time deviation) masks
--   broadband jitter performance compliance

-0-

John Ehrig, senior product manager for the TimeSource 3000 stated, "Telcordia's report illustrates the exceptional performance of Symmetricom's newest PRS product. It records all test results by Telcordia, the leading telecom test lab, on the TimeSource 3000. To our knowledge, no other vendor's product has been evaluated by a third-party laboratory and shown to meet the performance requirements of office PRS as defined by GR-2830. With test results readily available, customers, such as the leading telecommunication service providers, can be sure the TimeSource 3000 complies with GR-2830 specifications without the expense of doing their own product evaluation."

The Telcordia TimeSource 3000 audit report is available through Symmetricom. Please contact John Ehrig, Symmetricom, 2300 Orchard Parkway, San Jose, CA 95131. Phone [phone], e-mail [e-mail] or fax [phone]. Visit Symmetricom on the web at www.symmetricom.com.

Symmetricom, Inc. provides advanced network synchronization products that play a critical role in the operation and quality of service of sophisticated telecommunications networks. Symmetricom's synchronization and timing equipment is installed in telecommunications offices in over 50 countries worldwide. Global customers include network operators and network service providers. The company is developing products based on its proprietary Global Positioning System, BesTime intelligent clock and PowerHelix(TM) antenna technologies to address synchronization, timing and location needs of global communications markets.

Telcordia Technologies, Inc. (formerly Bellcore), an SAIC company, provides software, engineering, consulting and training services to optimize the performance of communication networks worldwide. Created in 1984, Telcordia employs 6,000 professionals and has revenues of more than $1.2 billion. Telcordia (www.telcordia.com) is headquartered in Morristown, NJ, with offices throughout the United States, Europe, Central and South America and Asia Pacific.