Sunnyvale and San Diego, Calif. - (July 8, 2008) — Spirent Communications plc (LSE: SPT), a global provider of performance analysis and service management solutions, and CETECOM Incorporated (USA) today announced that CETECOM has chosen Spirent FLO1-ATS automated test system for its MediaFLO™ /3G test lab in San Diego, Calif. CETECOM, a leading independent Wireless technology testing and certification organization, took a huge step in becoming the first independent FLO™ certification lab by signing a Test Services Agreement with Qualcomm.

The FLO technology was developed by Qualcomm for enabling broadband multimedia services on wireless networks. The service runs in “parallel” to other wireless services, using dedicated frequency spectrum so as not to interfere with more conventional voice and data services. With Spirent FLO1-ATS, a FLO receivers compliance to the FLO Device Minimum Performance Specification (TIA-1102) can automatically be measured. Since the introduction of the Spirent FLO1-ATS in 2006, this fully automated system has been in use by major network operators and device manufacturers.

“As an independent testing and certification lab, we always seek the most efficient and accurate test platforms,” said Maan Ghanma, Director of Mobile Communications at CETECOM Inc. “The automation and stability in the Spirent FLO1-ATS will help us achieve our goals of providing our customers with efficient and cost effective testing.”

“Spirent FLO1-ATS meets CETECOMs requirement for an efficient as well as a high performance test system,” said Rob VanBrunt, Vice President of Wireless Marketing at Spirent Communications. “With an efficient test process Spirent FLO1-ATSs Receiver Blocking Characteristics test takes about 15 hours and test lab engineers can cut this down to 5 hours, without any operator intervention.”

More detailed information on FLO1-ATS is available at www.spirent.com/go/FLO1ATS

About CETECOM

CETECOM is a worldwide leading provider in consulting, testing, certification and approval services for the wireless industry with state-of-the-art testing laboratories in Europe, the U.S. and Asia. The CETECOM network provides a unique service portfolio covering the entire life cycle of mobile and wireless communication products. For more information, please visit www.cetecomusa.com.

About Spirent Communications plc

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 worlds largest equipment manufacturers, service providers, enterprises and governments. Based in Sunnyvale, Calif., Spirent Communications has 1,300 employees worldwide.

Spirent Communications plc Ordinary shares are traded on the London Stock Exchange (ticker: SPT). The Company operates a Level 1 American Depositary Receipt (“ADR”) programme with each ADR representing four Spirent Communications plc Ordinary shares. The ADRs trade in the US over-the-counter (“OTC”) market under the symbol SPMYY and the CUSIP number is 84856M209. Spirent Communications sales to the United States government are made through Spirent Federal Systems Inc. www.spirentfederal.com