CHANTILLY, Virginia, February 23 /PRNewswire/ --

- High speed solutions to be integral part of Spirent's Ethernet Service 
Assurance portfolio

Endace Limited (LSE/AIM: EDA), a recognized developer of high speed
packet capture networking technology, today announced a technology
partnership with Spirent Communications (LSE: SPT) to develop the next
generation of high speed service assurance probes, used by service providers
to ensure quality of service on their networks. Spirent has a strong
reputation in the fast-growing field of Ethernet Service Assurance, enabling
service providers to verify revenue-generating IP-based services and their
underlying network infrastructure.

"We enable service providers to better track customers' service level
agreements and provide immediate and actionable status information about
their networks," remarked Sean Yarborough, Director of Marketing - Strategy
and Business Development at Spirent. "Our Quality of Service Probes are the
de facto standard used by service providers to confirm their IP networks can
meet exacting service level agreements. This partnership with Endace helps us
to develop higher-speed probes that will meet the growth in network bandwidth
and utilization."

While the need for Ethernet services has grown quickly, the management of
these multi-vendor IP networks has become more complex. With no standardized
approach to IP service management, operators have lacked end-to-end
visibility of Ethernet services and been challenged to provide faster
troubleshooting and resolution. These problems are compounded as network
loading increases and backhaul speeds scale accordingly.

"Spirent is the natural choice for any operator that has been challenged
with the monitoring and measurement of next generation IP networks," said
Stephen Gleave, VP Marketing at Endace. "When Spirent approached us to
develop technology for their next generation of Ethernet Assurance probes, it
was immediately obvious that this would be a logical fit for Endace's high
speed, lossless packet capture solutions."

About Endace

For organisations that rely on their data networks to do business, Endace 
provides high performance traffic analysis, latency measurement, network 
security and application acceleration solutions that capture, inspect and 
report on every single data packet. Our product portfolio includes high-speed 
packet capture technology, open development environments, multi-function 
network monitoring appliances and a comprehensive range of powerful yet 
intuitive management, measurement, alerting and analysis applications. These 
products provide the broadest, most capable range of packet capture 
technology, for any interface, speed or packet type.  We enable our customers 
to be confident in their service performance, traffic monitoring, information 
security, and regulatory compliance.  Based in Auckland, New Zealand, Endace 
also has offices in the UK, USA and Singapore.  Quoted on AIM, the stock 
code is LSE: EDA.  For further information: http://www.endace.com

Endace, the Endace logo, DAG and NinjaProbe are trademarks or registered 
trademarks in New Zealand or other countries of Endace Technology Limited.  
All other trademarks may be the property of their respective holders.

About Spirent

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 1,500
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.