Spirent(R) Communications Announces Modular Solution for Wireless Receiver Test.

Spirent SR5500 Tests Mobile WiMAX and Other Next-generation Wireless Technologies

SUNNYVALE, Calif. -- Spirent Communications plc (LSE:SPT) today announced a major new version of its SR5500 Wireless Channel Emulator, used to test wireless receivers. Successful deployment of Mobile WiMAX and other next-generation wireless networks depends on advanced techniques such as Multiple-Input Multiple-Output (MIMO) and beamforming. The industry expects that these methods will deliver significant gains in efficiency and data rates. Testing receivers that use these techniques is more critical and complex than ever, and requires a highly accurate emulated radio channel. The new SR5500 addresses these challenges, helping to limit deployment problems and associated revenue impact.

"To effectively test MIMO and beamforming techniques, the industry requires a very powerful wireless channel emulation engine," said Rob VanBrunt, vice president at Spirent Communications' wireless division. "But not all testing requires all this power. The SR5500's building block architecture lets our customers adapt to changing testing needs. For example, a 4 x 2 MIMO system can also serve as multiple 2 x 2 MIMO systems or as multiple bi-directional test systems."

"This flexibility offers the most cost-effective approach to meeting test requirements across wireless technologies without sacrificing performance or ease of use," said VanBrunt. "Using this approach, building blocks can be added to permit up to 8 RF I/O ports carrying 16 digital channels, all controlled by a single user interface."

Spirent's SR5500 Wireless Channel Emulator is the world's leading emulator of the wireless air interface, re-creating RF fading and noise effects for effective testing of wireless receivers. Based on decades' worth of wireless experience, the Spirent SR5500 provides the industry's cleanest test channel and most accurate fading. The Spirent SR5500's advanced fading engine ensures accurate testing of sophisticated technologies like HSPA, EV-DO, E-UTRA (LTE), and WiMAX.

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 world's largest equipment manufacturers, service providers, enterprises and governments. Based in Sunnyvale, CA, Spirent Communications has 1300 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

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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