ADVISORY/Spirent Communications Provides Performance Analysis Expertise in Three Sessions at Networld + Interop.

Business Editors/High-Tech Writers

ADVISORY...for Tues.-Thurs. (May 11-13)

NetWorld+Interop 2004 Las Vegas 

--(BUSINESS WIRE)

             Performance Analysis, Planning and Testing &
  Keynote Metro Ethernet: A Revolution in Services for the Enterprise
          Mark Fishburn, Vice President, Technical Strategy,
                        Spirent Communications
       Chairman of the Board of Directors, Metro Ethernet Forum

                   VoIP Architecture and Deployment
 Andy Huckridge, Senior Product Marketing Manager, IP Telephony group,
                        Spirent Communciations
     Vice Chairman, Multiservice Switching Forum Interoperability
                             Working Group
                           Member, SIP Forum

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WHO:            Spirent Communications(TM) (NYSE:SPM)(LSE:SPT) is
                a world-wide provider of integrated performance
                analysis and service assurance systems for next-
                generation network technologies. Spirent's solutions
                accelerate the profitable development and deployment
                of network equipment and services by emulating
                real-world conditions in the lab and assuring
                end-to-end performance of large-scale networks.

WHAT:           Performance and Data Center Conference Track:
                Performance Analysis, Planning, and Testing -- Network
                application performance must be understood and
                assessed based on real-world scenarios. Learn how to
                evaluate alternative solutions, ensure end-user
                satisfaction, and properly size required networking
                and data center resources.

                Metro Ethernet Summit - Keynote: Metro Ethernet: A
                revolution in Services for the Enterprise -- This
                session will update you on the progress towards
                carrier-class Ethernet and its impact on the
                enterprise, service providers and manufacturers.

                Internetworking Conference Track - VoIP Architectures
                and Deployment: VoIP is currently being used in many
                types of environments ranging from residential to
                enterprise systems. This presentation will provide
                broad coverage of the types of architectures that use
                VoIP, including an overview of how it works and some
                of the associated issues such as particular
                architectures and where the standards organizations
                are headed.

SPIRENT'S       Spirent, a long-time leader in the performance
LEADERSHIP      analysis industry and first to market with many
IN PERFORMANCE  solutions, has a team of experts to address the
ANALYSIS:       technologies and solutions network equipment
                manufacturers, enterprises, service providers and
                carriers need to test prior to deployment.

WHEN:  Topic                  Date       Time              Location
       ---------------------  ---------- ---------------   ---------
       Metro Ethernet Summit  Tuesday,   1:30-1:40 p.m.    Room N110
                              May 11
       ---------------------  ---------- ---------------   ---------
       Performance Analysis,  Wednesday, 11:30 a.m.-       Check
       Planning, and Testing  May 12     12:45 p.m.        schedule
       ---------------------  ---------- ---------------   ---------
       VoIP Architectures     Thursday,  9:30-10:30 a.m.   Array
       and Deployment         May 13

WHERE:          Networld + Interop, Las Vegas Convention Center,
                Las Vegas, Nevada, May 11-13, 2004
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