SpatialNews Press Release

Spirent Communications Ships Production Test Solution for GPS-Enabled Mobile Devices; GSS4100 GPS Simulator provides production test capabilities

www.spirent.com

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PAIGNTON, DEVON, UK, Oct. 31, 2001--Spirent Communications(TM), a wholly-owned business group of Spirent plc (NYSE:SPM) announces that its GSS4100 GPS Simulator has now available for production testing of GPS-enabled mobile devices. A new-generation of mobile devices is emerging, equipped with built-in GPS receivers capable of providing location-based services for commercial and public safety applications. Public safety applications such as the FCC's Enhanced 911 (E911) Phase 2 mandate require accurate determination of a mobile user's location.

To ensure proper performance in mission-critical position location applications, mobile device manufacturers test the GPS performance of their products during the manufacturing process. Spirent's GSS4100, a complete, low-cost single channel GPS simulator, offers the ideal solution for parametric manufacturing test of GPS receivers.

"The GSS4100 is an excellent application-specific solution for evaluating CDMA mobile devices that incorporate Qualcomm's gpsOne(TM) chipset, and other chipsets that utilize Assisted GPS technology," says Peter Boulton, director of technology at Spirent Communications, GSS Division. "To best meet the needs of our common customers, Spirent worked closely with the industry's leading CDMA ASIC providers to develop a solution optimized for high-speed, high-volume production test environments."

The GSS4100 generates GPS L1 C/A code signals with wide-range of programmable parameters such as PRN, power level, Doppler, time of the simulation and signal/message content. In addition to an easy to use Windows interface, the GSS4100 offers a fully integrated, ATE mode via remote interfaces, tailored for manufacturing test setups. Standard IEEE-488 (GPIB) and USB interfaces integrate the GSS4100 into a user's test environment. The GSS4100 also supports synchronization to other key production test instruments, such as a base station emulator or one-box radio test set, via external time synchronization interfaces.

"The GSS4100 has been particularly well received by Japan and Korea's largest CDMA mobile device manufacturers, who will be among the first to produce mobile phones with a position location capability," said Mitch Stone, vice president of sales for Spirent Communications', GSS Division. "Spirent has worked closely with 1st tier device manufacturers to successfully outfit their production test stations with our solution."

For CDMA product development and design verification test applications, Spirent also offers an integrated, automated Position Location Test System (PLTS). The PLTS emulates more complex multi-pilot, multi-satellite test environments for in-depth characterization of mobile device performance.

For more information on the GSS4100, see the "Featured Product" on GSS' web portal, which can be accessed at www.spirentcom.com/gss. Mitch Stone can be contacted via email: mitch.stone@spirentcom.com, or by phone: (817) 847-7311.

About Spirent Communications

Spirent Communications unites the best in performance analysis technology with network operations expertise. The company's award-winning solutions enable customers to accelerate the development, deployment and assurance of next-generation network equipment and services worldwide.

Spirent Communications designs and manufactures Adtech, DLS, Edgcumbe, GSS, Hekimian, Net-HOPPER, SmartBits, TAS and Zarak products. More than 2,500 of the world's leading network and terminal equipment manufacturers, network service providers, corporate enterprises and test laboratories rely on our first-to-market products to verify and measure the performance and services of networks and communications devices.

Spirent plc is listed on the London Stock Exchange (ticker: SPT). The company is also listed on the New York Stock Exchange through a Level 2 American Depository Receipt program, through which one ADR represents four Spirent shares (ticker: SPM; CUSIP number: 84856M209). Further information about Spirent plc can be found at www.spirent.com.

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Nov 1, 2001 Jun 26, 2002