Spirent Communications Provides Performance Analysis Expertise in Three Sessions at SUPERCOMM

Business Wire, June 21, 2004

Chair of Metro Optical Network Architecture and Applications TechForum

          Moderator of Keynote Event "The Next Ethernet Wave"
           Mark Fishburn, Vice President, Technical Strategy
       Chairman of the Board of Directors, Metro Ethernet Forum

            Presentation on IP Telephony and QoS Management
 Dave Gellerman, Vice President, Technology and Corporate Development
   Board Member, Alliance for Telecommunications Industry Solutions


WHO:        Spirent Communications(TM) (NYSE:SPM)(LSE:SPT) is a
            worldwide 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:       Metro Optical Network Architecture and Applications
            TechForum -- Explores the key advances in optical
            networking technology and how carriers are implementing
            these leading-edge developments in metro, access and core
            networks.

            The Next Ethernet Wave -- Ethernet inventor Bob Metcalfe
            will speak first about Ethernet's amazing 31 years of
            proliferation and evolution. He'll suggest where Ethernet
            might go next after last year's shipment of 184 million
            10/100 wired Ethernet LAN ports.

            USTA Telecom Engineering Conference: IP Telephony session
            -- This is the IP white paper event of the telecom
            industry. The USTA has chosen the most forward thinking,
            visionary and eminently industry changing white papers to
            be presented. The Telecom Engineering Conference will
            provide telecom leaders twenty minutes to discuss,
            persuade and debate their IP visions.

WHEN:          Topic           Date            Time         Location

            Metro Optical Monday, June 21     9:30 a.m. Check Schedule
             Summit

            The Next      Wednesday, June 23  2:15 p.m.    Room S101
             Ethernet                          - 3:30 p.m.
             Wave

            USTA Telecom  Wednesday, June 23  4:00 p.m. Check Schedule
             Engineering                       - 4:30 p.m.
             Conference

WHERE:      SUPERCOMM, McCormick Place, Chicago, IL
            June 20-24, 2004