Symmetricom Demonstrates IEEE 1588 Version 2 Precise Time Protocol (PTP) Solutions at ISPCS 2007's Plug-fest.

SAN JOSE, Calif. -- Symmetricom, Inc. (NASDAQ: SYMM), a worldwide leader in precise time and frequency technologies that accelerate the deployment and enable the management of next generation networks, today announced the company is demonstrating its latest IEEE 1588 Version 2 Precise Time Protocol (PTP) solutions at the 2007 International IEEE Symposium on Precision Clock Synchronization for Measurement, Control and Communication (ISPCS) on Monday, October 1 - Wednesday, October 3, 2007 in Vienna, Austria. Symmetricom is participating in Plug-fest, where vendors can test, validate and demonstrate device and system interoperability.

During Plug-fest, Symmetricom is demonstrating its XLi Grand Master Clock and its PackeTime[TM] server card fully integrated into Symmetricom's SSU-2000[TM] Building Integrated Timing Supply (BITS) system, both supporting the IEEE 1588 Version 2.0 PTP, meeting the latest 1588 standards. The PackeTime server card leverages the time gating technology delivering sub-microsecond time accuracy with stability to commensurate with clock modules installed in the communication shelf. The PTP functionality supports the default profile as defined by the 1588 Version 2.0 specification as well as the telecom profile based on the ITU submission. The clock module will also demonstrate the probe mode of operation to allow time and frequency data to be collected in order to analyze the network capabilities of the next generation network, providing services over the packet networks. This solution is targeted at the telecommunication infrastructure market in order to support the roll out of the next generation network.

The XLi Grand Master Clock is an ultra precise 1588 Version 2.0 PTP clock supporting the latest 1588 Version 2.0 specifications as defined by the standards body. The solution also incorporates peer to peer time delay measurements to facilitate instantaneous calibration of network delays targeted at the industrial automation and power utility markets Further, with its ability to function as both master and slave and available options such as TIET and Time Monitor software for characterizing parameters such as time interval, delays and jitter, XLi Grand Master Clock is an ideal test and validation tool for IEEE-1588 Version 2.0 products and systems. In addition XLi Grand Master clock targets infrastructure applications in core markets.

"Symmetricom is committed to supporting IEEE 1588 Version 2.0 PTP standards to address the telecom and government infrastructure, as well as test and validation markets with complete products and services," commented John Hirsekorn, vice president of sales and marketing at Symmetricom.

Any vendor participating in Plug-fest can test and validate their 1588 version 2.0 products using Symmetricom products that will serve as the 1588 Grand Master clock or a slave clock. Plug-fest integration and interoperability testing will be conducted on October 1 with results shown to conference participants on October 2.

ISPCS 2007 provides a forum for researchers and practitioners from industry, academia and government involved in the area of precision clock synchronization using IEEE 1588 or similar techniques and protocols. The event is sponsored by the Austrian Academy of Sciences, the IEEE Instrumentation and Measurement Society and the National Institute of Standards and Technology (NIST).

In addition to the product demonstrations, Tim Frost, principal technologist for Symmetricom, will present "Operation of IEEE 1588 PTP v2 over a Telecoms Network - The Telecoms Profile" on Monday, October 1 during the Poster Session. Lee Cosart, systems technologist for Symmetricom, will present, "Precision Packet Delay Measurements Using IEEE 1588 v2" on Tuesday, October 2 during Session 3: Applications of Synchronized Clocks.

For more information on ISPCS 2007 and Plug-fest, visit: http://www.ispcs.org.

About Symmetricom, Inc.

As a worldwide leader in precise time and frequency products and services, Symmetricom provides "Perfect Timing" to customers around the world. Since 1985, the company's solutions have helped define the world's time and frequency standards, delivering precision, reliability and efficiency to wireline and wireless networks, instrumentation and testing applications and network time management. Deployed in more than 90 countries, the company's synchronization solutions include primary reference sources, building integrated timing supplies (BITS), GPS timing receivers, time and frequency distribution systems, network time servers and ruggedized oscillators. Symmetricom also incorporates technologies including Universal Timing Interface (UTI), Network Time Protocol (NTP), Precision Time Protocol (IEEE 1588), and others supporting the world's migration to Next Generation Networks (NGN). Symmetricom is based in San Jose, Calif., with offices worldwide. For more information, visit www.symmetricom.com.