O(2) Germany Chooses Spirent(R) Communications' SwissQual for Standardizing Drive Testing and Benchmarking Operations

Spirent Communications (NYSE:SPM) (LSE:SPT) announced today that O2 Germany, a leading provider of mobile services, has chosen SwissQual’s new high-end Diversity platform to meet their GSM/UMTS & HSDPA wireless benchmarking needs. The contract marks a significant step in Spirent’s growth in the wireless market and signals O2 Germany’s commitment to providing best-in-class customer experience throughout all four of its service regions. The Diversity contract enables O2 to standardize on SwissQual equipment as part of a harmonization project to streamline the number of different vendors for this type of equipment Diversity is a powerful platform that allows network operators to continuously test the quality of service, as well as benchmark their network’s performance against those of their competitors. Unlike other platforms, Diversity provides simultaneous, end-to-end testing for voice, data and video, a unique feature that makes drive testing easier and more cost effective for network operators Diversity offers a highly scalable drive test solution that meets the demands for network benchmarking today – and in the future. Diversity enables flexible test configurations and scheduling and uses sophisticated data analysis and reporting tools to provide critical information about problems within a network before customers experience them. "Benchmarking our network is critical to ensuring customer satisfaction,” said Karl-Wilhelm Rohrsen, Managing Director, O2 Germany. "We selected Diversity as a result of our extensive trials and our past experience with SwissQual. Diversity meets our benchmarking demands today, and provides a platform for future growth.” "We appreciate the opportunity to build upon our relationship with O2 and to provide quality benchmarking systems,” said Tomas Ahnebrink, Vice President of SwissQual, which was acquired by Spirent Communications in January of 2006. "This announcement demonstrates our belief that benchmarking has a direct impact on the quality of experience for wireless customers. We are pleased to support O2 in their commitment to delivering the highest quality voice, data and video services.” 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 O2 O2 (Germany) GmbH & Co. OHG, a subsidiary of the O2 Group, offers its post-paid and pre-paid subscribers almost blanket GSM provision in Germany with its own mobile communications network and via a roaming agreement with T-Mobile. In addition to this, the company provides innovative mobile data services on the basis of GPRS and UMTS technology. The O2 Group has more than 37 million subscribers in the UK, Ireland, the Czech Republic and Germany. (www.de.o2.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. This press release may contain forward-looking statements that are based on current expectations or beliefs, as well as assumptions about future events. By their nature, forward-looking statements are inherently predictive, speculative and involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future. You should not place undue reliance on these forward-looking statements, which are not a guarantee of future performance and are subject to factors that could cause our actual results to differ materially from those expressed or implied by these statements. These risks include the risks described from time to time in Spirent Communications plc's Securities and Exchange Commission periodic reports and filings. We undertake no obligation to update any forward-looking statements contained in this press release, whether as a result of new information, future events or otherwise.