SUNNYVALE, California, August 4 /PRNewswire/ --

- Spirent Ranks First for Ethernet Testing in Lab, Live and Home Networks

Spirent Communications plc (LSE: SPT), a global provider of network,
device and services testing, has been recognized as the market leader for
Ethernet testing by Frost & Sullivan according to the World Gigabit Ethernet
Test Equipment Market report. Spirent sold more Ethernet test ports than any
other vendor through its comprehensive solution portfolio that spans testing
from the lab to the live network and into the subscriber's home.

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

"For more than a decade Spirent has pioneered advancements in Ethernet
testing and we are delighted to see our leadership position validated by our
customers through Frost & Sullivan's research," said Bill Burns, CEO,
Spirent. "As the industry migrates to ever more complex technologies, we
remain focused on delivering world-class products that enable our customers
to rapidly deliver new solutions and services."

This award underscores Spirent's unmatched Ethernet testing expertise
that extends from the lab with product development and verification, to the
field for service assurance and to the in-home network to ensure Quality of
Experience (QoE) of multiplay applications. Spirent's Ethernet lab solutions
including its flagship product - Spirent TestCenter (TM), and service
assurance tools such as Spirent Tech-X Flex, have been designed to test
high-speed communication networks that deliver rich media content.

As the industry migrates to 40/100 Gigabit Ethernet networks that support
high bandwidth applications, addressing realism will be critical to ensuring
service QoE. The emphasis on realism is the reason why service providers and
equipment manufacturers across the globe depend on Spirent to address the
complexities of high-speed Ethernet testing.

"It is no longer enough to offer test tools that focus solely on
performance," said Jessy Cavazos, industry manager, Measurement &
Instrumentation, Frost & Sullivan. "Instead, network equipment vendors and
service providers are demanding test solutions that offer enhanced realism as
they scale their products and networks. Spirent stands above the crowd in
terms of delivering the realism, scalability and the intelligent results
required by customers testing Ethernet solutions today."

Spirent was also recently recognized by Frost & Sullivan as the market
leader for enterprise network test and measurement solutions. In addition, it
has received numerous other accolades including Test & Measurement World's
2009 Best in Test Award, and the NGN Leadership Award 2009.

About Frost & Sullivan

Frost & Sullivan, the growth partnership company, enables clients to
accelerate growth and achieve best in class positions in growth, innovation
and leadership. The company's growth partnership service provides the CEO and
the CEO's growth team with disciplined research and best practice models to
drive the generation, evaluation and implementation of powerful growth
strategies. Frost & Sullivan leverages over 45 years of experience in
partnering with Global 1000 companies, emerging businesses and the investment
community from more than 35 offices on six continents. To join our growth
partnership, please visit http://www.frost.com.

About Spirent Communications plc

Spirent Communications (www.spirent.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 1,300
employees worldwide. For more information visit
http://www.spirent.com/planet-spirent/media_room/about_spirent_communications_plc.aspx

This document may contain forward-looking statements which are made in
good faith and are based on current expectations or beliefs, as well as
assumptions about future events. You can sometimes, but not always, identify
these statements by the use of a date in the future or such words as "will",
"anticipate", "estimate", "expect", "project", "intend", "plan", "should",
"may", "assume" and other similar words. By their nature, forward-looking
statements are inherently predictive and 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. The Company
undertakes no obligation to update any forward-looking statements contained
in this document, whether as a result of new information, future events or
otherwise.