Siemens Selects Spirent(R) Communications' SwissQual as the Standard for New Wireless Service Assurance Offering

Spirent Communications (NYSE:SPM)(LSE:SPT), a global provider of performance analysis and service management solutions, today announced that Siemens Networks, one of the world’s largest telecommunications vendors, has chosen SwissQual’s QualiPoc system to monitor network performance. Siemens Networks offers a wide range of professional services such as monitoring and benchmarking of mobile network performance vendor independently. SwissQual’s system provides a powerful and economical drive test solution that will serve as the foundation for Siemens’ new network quality testing and benchmark service. SwissQual’s system unites the cost effectiveness of unattended operation with the power of fully automatic network analysis. The QualiPoc system is a market-leading solution that monitors and benchmarks the deployment of quality services. It runs on industry-standard smart phones and supports voice, data, browsing, messaging and video testing. By collecting actual network performance data from the field and doing active QoS tests, QualiPoc produces the real subscriber feedback based on Key Performance Indicators (KPI’s) to identify service degradations, troubleshoot them, and allow Services Providers to develop strategies for network and service optimization for best possible performance. "Wireless subscribers expect high-quality networks from the very first day of operation,” said Godfrey Chua, Research Manager, Wireless and Mobile Infrastructure Group at IDC. "Therefore, network operators must be certain that they get it right the first time by providing superior service to attract new customers and to protect against subscriber churn.” With SwissQual systems, Siemens will be able to conduct real-time data collection, network quality assessment and analysis to enable the deployment of quality wireless services. "Our new wireless test capability is an integral part of our turnkey projects and managed services contracts with wireless service providers,” said Stefan Bischof, Director Network Optimization Services. "We selected SwissQual’s systems as part of our strategic entry into the wireless service assurance business because they are high-quality, efficient solutions to monitor network service quality.” "The agreement with Siemens Networks reinforces the important role testing plays in network deployments and operation,” said Tomas Ahnebrink, vice president of SwissQual, which was acquired by Spirent Communications in January 2006. "Network operators want to be sure their systems provide high quality service at initial deployment. By using SwissQual solutions, Siemens will help operators deploy and manage their networks with confidence.” About Spirent Communications Spirent Communications (www.spirentcom.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 1,800 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 About Siemens Networks GmbH & Co KG Siemens Networks(a) engages in a dialog with its customers to create trendsetting communications solutions that help network operators and service providers achieve their business goals. Siemens Networks contributes its innovative strength, worldwide experience and unsurpassed implementation expertise in all areas of voice and data communications. As an innovation leader, Siemens Networks delivers customer value today and prepares customers for tomorrow with trendsetting solutions. Siemens Networks is a fully-owned subsidiary of Siemens AG and operates in about 100 countries. (a) Siemens Networks will merge into a 50-50 joint venture with the Nokia Networks Business Group, creating a telecommunications powerhouse that will be called Nokia Siemens Networks. The new company will be a global communications leader with strong positions in important growth segments of the fixed and mobile network infrastructure and services, featuring a world-class fixed-mobile convergence capability. The new company Nokia Siemens Networks is expected to start operations by January 1, 2007, subject to customary regulatory approvals, the completion of standard closing conditions, and the agreement of a number of detailed implementation steps. More about Siemens Networks at www.siemens.com/networks Spirent, Spirent Communications and the Spirent logo are trademarks or registered trademarks of Spirent Communications plc. 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