Symmetricom's TimeSource 3500 and TimeHub 5500 Earn NEBS Level 3 Certification.

Business Editors/High-Tech Writers

SAN JOSE, Calif.--(BUSINESS WIRE)--Oct. 31, 2001

Carrier-Class Certification Ensures Synchronization Products Meet

Highest Standards for Safety, Reliability and Compatibility For

Telecommunications Carriers

Symmetricom(R), Inc. (Nasdaq:SYMM) today announced that its TimeSource 3500 Primary Reference Source (PRS) product, and its TimeHub 5500 Building Integrated Timing Supply (BITS) system have both passed the rigorous Network Equipment Building System (NEBS) Level 3 certification tests. The TimeSource 3500 and TimeHub 5500, together with the previously certified TimeSource 3000 and 2700, are the only family of synchronization units on the market that are NEBS Level 3 certified by an independent laboratory. Regional Bell Operating Companies (RBOCs), such as Bell South, Verizon, QWEST and SBC Communications, as well as the Interexchange Carriers (AT&T, Sprint and Worldcom), demand NEBS Level 3 certification to ensure products meet carrier class standards for safety, reliability and compatibility with their existing equipment.

Without synchronization, telecommunications networks do not work. Symmetricom's synchronization products provide the stable frequency necessary for network elements such as switches, routers, data terminals and optical transport equipment to pass information across the network. Poor synchronization will cause loss of data, low bandwidth efficiency, cell phone call drop outs, poor voice quality, jerky video and unreadable faxes. Carriers have been steadily expanding and upgrading their network synchronization elements to meet tighter performance and reliability requirements due to increased traffic volumes, higher data speeds and more complex network equipment. The NEBS Level 3 certification enables carriers and service providers to install Symmetricom's TimeHub 5500 and the TimeSource 3500 with complete confidence that the products will perform safely and not interfere with other network equipment.

"Because synchronization is essential and high quality synchronization plays such a key role for ensuring network performance, bandwidth optimization and quality of service, carriers worldwide are upgrading their central offices and outlying networks with advanced synchronization equipment such as TimeHub 5500 and TimeSource 3500," said Eduardo Inzunza, vice president of sync marketing at Symmetricom. "By earning the NEBS Level 3 certification, we provide carriers with the confidence that our products will deliver the improved network performance and reliability that they and their customers demand."

About TimeHub 5500

The TimeHub 5500 Building Integrated Timing Supply (BITS) serves as the sync source within telephone Central Offices. The unit guarantees that all telecommunications equipment network elements within the Central Office and between central offices are reliably synchronized and therefore performing at maximum efficiency. Given the essential nature of synchronization to telecommunications networks, the TimeHub architecture features redundancy and diversity throughout, thereby ensuring carrier-quality performance, even if an individual circuit or element fails. As an "intelligent" network element, TimeHub provides multiple monitored inputs and full remote management and provisioning, allowing network managers to monitor, manage and provision from a centralized location. TimeHub's high-density protected output configurations provide synchronization to the greatest number of network elements using the smallest amount of space in the industry. Additionally, TimeHub features the flexibility of expansion and remote shelves that provide additional outputs and clocking redundancy to handle the synchronization needs of large central offices.

About TimeSource 3500

Symmetricom's TimeSource 3500 Primary Reference Source (PRS) product synchronizes networks by using signals from the Global Positioning Satellite (GPS) system and/or DS1 primary reference signals. While most GPS PRS products require a rooftop antenna to access the GPS signals, TimeSource 3500 uses a small antenna that can be deployed in a window or outside wall, greatly reducing installation and maintenance costs. The TimeSource 3500 incorporates a next generation rubidium oscillator and patented control algorithms (BesTime) that ensure the user's network remains functioning for a minimum of 30 days if all reference signals are lost. The multiple fallback timing sources allow network operators a means to maintain central office integrity in disaster scenarios.

About Symmetricom, Inc.

Symmetricom(R) 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 helps maximize the deliverable bandwidth over the copper telephone wire infrastructure, eliminating the distance barriers for the consumer market and the cost barriers in the business market for value-added broadband services. 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 

The foregoing statements are forward-looking and may differ materially from the company's current expectations. The company assumes no obligation to update such forward-looking statements. Other factors and risks that could impact the company's decision relative to repurchase shares are discussed in the company's filings on Forms 10-K and 10-Q with the Securities and Exchange Commission.