Spirent® Communications Announces Commercial Availability of Its Automated MediaFLO™ Test System

Business Wire, March 27, 2007

Spirent's FLO1-ATS Provides Complete, Automated Minimum Performance Testing of MediaFLO-Capable Mobile Devices

SUNNYVALE, Calif. -- Spirent Communications plc (NYSE:SPM) (LSE:SPT), a global provider of performance analysis and service management solutions, announced today the availability of its test system for MediaFLO-enabled mobile devices, the first to include full test automation. Spirent's FLO1-ATS allows network operators and device manufacturers to ensure the quality of experience for subscribers receiving MediaFLO services by thoroughly qualifying MediaFLO-enabled device performance prior to deployment.

MediaFLO is based on FLO[TM] technology, a globally-recognized air interface standard that is supported by the FLO Forum and more than 70 industry members. It is designed specifically to increase wireless network capacity and coverage and to reduce multimedia delivery costs. It is complementary to existing 2G/3G networks.

Spirent's FLO1-ATS is an integrated system that automates testing per the TIA-1102 minimum performance test specification. It brings complete automation to FLO minimum performance testing, resulting in reduced test times and faster time-to-market. The system's automation also improves consistency, which greatly reduces human errors in the testing process, and improves the accuracy and reliability in measurements and test results. The fully integrated, stand-alone system requires no additional hardware to deliver FLO I testing for MediaFLO-enabled devices.

"With FLO1-ATS, Spirent continues its leadership in providing integrated, optimized and fully automated test solutions to the mobile industry," said Nigel Wright, vice president of product marketing at Spirent. "As part of Spirent's commitment to enabling the success of Mobile TV services, we now have an automated system to ensure that MediaFLO-enabled devices meet performance requirements."

MediaFLO is designed to enable revolutionary new wireless services and deliver high-quality multi-media to wireless users. Spirent's FLO1-ATS is a powerful, automated system that helps device manufacturers and service providers achieve their goals of minimizing deployment problems and improving end-user satisfaction with MediaFLO-based services.

Spirent's FLO1-ATS addresses the requirements of FLO minimum performance testing, evaluating a FLO receiver's performance and ability to demodulate under a variety of real-world conditions. It provides a highly accurate channel emulation capability to simulate AWGN, co-channel interference and multi-path fading over different channel profiles. Precise timing and filtering mechanisms satisfy the stringent signal and noise requirements inherent to FLO testing. Ready-to-run test cases improve testing productivity, while offering flexibility to support customized test suites.

About Spirent Communications

Spirent Communications (www.spirent.com) is a global provider of integrated performance analysis and service assurance systems that enable the development and deployment of next-generation networking technology such as Internet telephony, broadband services, 3G wireless, global navigation satellite systems, and network security equipment. Spirent Communications' solutions are used by more than 1,700 customers in 30 countries, including the world's largest equipment manufacturers, service providers, enterprises and governments. Based in Sunnyvale, CA, Spirent Communications has 1,900 employees worldwide.

Spirent Communications plc Ordinary shares are traded on the London Stock Exchange (ticker: SPT) and on the New York Stock Exchange (ticker: SPM; CUSIP number: 84856M209) in the form of American Depositary Shares ("ADS"), represented by American Depositary Receipts, with one ADS representing four Ordinary shares. Spirent Communications' sales to the United States government are made through Spirent Federal Systems Inc. www.spirentfederal.com.

Spirent, Spirent Communications and the Spirent logo are trademarks or registered trademarks of Spirent Communications plc. All other trademarks or registered trademarks mentioned herein are held by their respective companies. All rights reserved.

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