SUNNYVALE, California, May 18 /PRNewswire/ --

- Frost & Sullivan Research Declares Spirent as the Market Leader in
Enterprise Network Test & Measurement Solutions for Research and Evaluation
Labs

Spirent Communications plc (http://www.spirent.com/ ) (LSE: SPT), a
leader in network, service and device testing, has been recognized by Frost &
Sullivan (http://www.frost.com/ ) as the leader in enterprise network test
and measurement solutions for research and evaluation labs. According to
Frost & Sullivan's recent report that surveyed the enterprise network system
testing and monitoring solutions market, Spirent maintained its leadership
position with more the one-third of the market share in the research and
evaluation lab segment.

(Logo: http://www.newscom.com/cgi-bin/prnh/20090220/SPIRENTLOGO )

This award validates Spirent's commitment to delivering test solutions
that address the technological innovations of today's and tomorrow's
enterprise networks. Furthermore, it is a testament to customers' trust in
Spirent's enterprise network test solutions suite. This award adds to
Spirent's long list of industry recognitions, market firsts and customer
testimonials. Spirent is a trusted partner and test equipment vendor of
choice for the world biggest network equipment manufacturers. Fortune 1000
companies as well as system vendors repeatedly turn to Spirent to architect
best-in-class systems and networks for 10/40/100G Ethernet, Fibre Channel
over Ethernet (FCoE), virtualized and cloud computing based data centers and
High Speed Ethernet (HSE) based applications.

"Spirent is clearly a pioneer in the enterprise testing space with a wide
range of solutions that enable the validation of advanced data centers before
deployment," said Olga Yashkova, industry analyst, Frost & Sullivan. "Its
foray into virtualization comes at a time when the operators of data centers
are seeking ways to operate more efficiently and more cost-effectively.
Spirent's efforts allow enterprises and equipment vendors alike to achieve
their goals while reducing their long-term operating and capital costs."

Spirent's professional services team, previously recognized by Frost &
Sullivan as the industry's best, coupled with a portfolio of award-winning
products including Spirent TestCenter(TM), Spirent HyperMetrics(TM), Spirent
TestCenter Virtual and Spirent Avalanche delivers a unique holistic approach
to data center testing. The company's ability to bring ground-breaking
technologies to the market such as the recently announced Spirent
TestCenter(TM) Virtual remains at the heart of this market recognition.

"Spirent's continued position as the world leader in the test and
measurement market is a result of our commitment to delivering solutions that
enable our customers to successfully develop products and services that are
not only technologically superior, but offer the highest return on their
investment" said Bill Burns, CEO of Spirent Communications. "I am honored to
accept this prestigious award as it validates our investment into creating
innovative products that advance enterprise networking and data center
technologies."

About Frost & Sullivan

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About Spirent Communications plc

For more information visit http://www.spirent.com/news/about_spirent.cfm