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Rubidium Atomic Clock is optimized for 4G/LTE mobile equipment.

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November 8, 2011 - Suited for 4G/LTE mobile network equipment, SA.32m protects against service disruption that could occur during temporary loss of GPS signal or when network-based sync signal is not available. Product specifically enables base station designs for holdover of ±1.5 µsec for up to 24 hr, enabling networks to remain synchronized even if primary synchronization sources are unavailable. Supplied in 2 x 2 x 0.7 in. package, clock delivers stability to 100 second Allan Variance of 1E-11.

(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press Release

Symmetricom, Inc.
2300 Orchard Pkwy.
San Jose, CA, 95131
USA



Symmetricom Expands Quantum(TM) Family of Atomic Oscillators with Advanced Rubidium Clock Optimized for 4G/LTE


SA.32m Supports +/- 1.5 microsecond holdover for up to 24 hours

SAN JOSE, Calif. -- Symmetricom®, Inc. (NASDAQ: SYMM), a worldwide leader in precision time and frequency technologies, today announced that is has developed a high-performance Rubidium atomic clock for 4G/LTE mobile network equipment. The SA.32m enables base station designs for holdover of +/-1.5 microseconds for up to 24 hours, so that networks remain synchronized even if primary synchronization sources are unavailable.

"Holdover is a key factor in assuring network performance especially for 4G/LTE deployments. Rubidium, in particular, is able to provide incredibly high levels of accuracy. Symmetricom's compact low-power solution makes it a viable option for operators as they look to increase network efficiency in next-generation deployments," said Glen Hunt, principal analyst, Current Analysis.

With 4G/LTE network demands, synchronization accuracy is increasingly important for operators to deliver uninterrupted end-user services. LTE base stations must deliver advanced services and need synchronization with other base stations at all times. A holdover oscillator in base stations is an ideal way to protect against service disruption that could occur during a temporary loss of the GPS signal or when a network-based sync signal is not available.

Primary characteristics of the SA.32m Rubidium Atomic Clock optimized for LTE equipment, include:

-- Holdover: +/-1.5 microseconds for up to 24 hours

-- Aging rate: 1E-10 per month

-- Temperature stability: 1E-10 over full operating temp range

-- Power consumption: 5 watts at 25 degrees C steady state

-- Stability: 100 second Allan Variance of 1E-11

-- Package Size: 2 x 2 x 0.7 inches

"Rubidium is recognized for delivery of precise holdover in thousands of CDMA base stations deployed worldwide," said Manish Gupta, vice president of marketing for Symmetricom. "LTE has even more stringent synchronization requirements and the SA.32m is ideally suited to support 24 hours of phase holdover in LTE macro base stations. Furthermore, the SA.32m is available at prices substantially below previous generation of Rubidium atomic clocks."

The Quantum(TM) SA.32m high performance clock further enhances Symmetricom's embedded solution portfolio which was also announced today with the introduction of the SCi 2000 rel. 2.0 SoftClock. For more on both products, please visit: http://symmetricom.com/products/frequency-references/rubidium-frequency-standard/SA.32m/http://www.symmetricom.com/products/ieee-1588-ptp-solutions/ptp-clients/SCi-2000-Embedded-Software-Clock/

Symmetricom's Quantum(TM) family of oscillators bring atomic accuracy, small form factor, and reduced power consumption to a broad range of applications. For more information on Symmetricom's Quantum family including miniature atomic clocks with Rubidium such as the SA.32m, please visit: http://www.symmetricom.com/products/quantum-atomic-oscillators/

About Symmetricom, Inc.

Symmetricom (NASDAQ:SYMM), a world leader in precise time solutions, sets the world's standard for time. The company generates, distributes and applies precise time for the communications, aerospace/defense, IT infrastructure and metrology industries. Symmetricom's customers, from communications service providers and network equipment manufacturers to governments and their suppliers worldwide, are able to build more reliable networks and systems by using the company's advanced timing technologies, atomic clocks, services and solutions. All products support today's precise timing standards, including GPS-based timing, IEEE 1588 (PTP), Network Time Protocol (NTP), Synchronous Ethernet and DOCSIS® timing. Symmetricom is based in San Jose, Calif., with offices worldwide. For more information, visit: http://www.symmetricom.com.

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