Symmetricom Improves Performance of Telecommunications Networks.

Business Editors/High-Tech Writers

SAN JOSE, Calif.--(BUSINESS WIRE)--Sept. 16, 2002

New RTHC Control Card Dramatically Increases Performance and

Reliability in SS7, SONET and ATM Applications

Symmetricom, Inc. (Nasdaq:SYMM), today announced the newest upgrade to its Digital Clock Distributor (DCD) product line. The Remote Track and Hold Card (RTHC) provides intra office phase alignment with short term stability better than Stratum 2 when using remote DCD systems

The RTHC's holdover stability is 1x10 to the negative 10 for over 12 hours, ensuring that critical systems like SS7, SONET, interoffice cross connect, and ATM remain in service for a much longer period of time in the event of a synchronization failure. By upgrading their remote systems with the RTHC, service providers also gain the ability to monitor reference input performance and statistics, providing improved sync visibility.

"Symmetricom continuously looks for ways to maximize the efficiency of the legacy equipment in service providers' existing networks", said Rick Stroupe, executive vice president and general manager of Symmetricom's Sync Division. "The RTHC card is another example demonstrating that a provider who deploys a Symmetricom synchronization system can feel safe that we will continue to make enhancements and support their legacy equipment and requirements over the long term."

In sync networks, holdover clocks are employed to bridge outage periods, thus enabling service providers to address network device outages before business is negatively impacted. By dramatically improving the holdover time of the remote clock after a connection failure, potential losses are cut because maintenance is performed while the network remains up and running. Monitoring the performance of the network detects synchronization degradations allowing scheduled maintenance, further reducing costs.

The RTHC architecture is based on the Core Sync Module (CSM) and SmartClock(TM) algorithm, which is the next generation technology that provides holdover performance well beyond current limits. The RTHC upgrade meets the demands of critical services by providing precise timing, intelligent management and control, and enhanced holdover. The RTHC also supports redundancy, firmware download, alarm event caching, and shelf inventory.

About Symmetricom

Symmetricom, Inc. (Nasdaq:SYMM) makes wireline and wireless communication possible for businesses and consumers, improving global network traffic and increasing the value of the copper telephone wire infrastructure. The company's intelligent synchronization products are essential for the transmission of voice, data and video over any network, and the company's broadband products extend the reach and bandwidth of broadband services from the Internet backbone over the "last mile." Symmetricom's customers include the world's largest carriers and service providers. The Company is headquartered in San Jose, Calif., with offices worldwide. For more information, visit www.symmetricom.com.

Safe Harbor 

This press release contains forward-looking information within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and is subject to the safe harbor created by those Sections. These forward-looking statements include statements concerning product features, benefits, and applications in telecommunications networks. Factors and risks that could impact the company are detailed from time to time in Symmetricom's Securities and Exchange Commission reports, including but not limited to its annual report on Form 10-K for the year ended June 30, 2001 and Form 10-Q for the quarter ended March 31, 2002. These forward-looking statements speak only as of the date hereof. Symmetricom disclaims any intention or obligation to update or revise any forward-looking statements.