ADVISORY/Proficient Networks President and CEO Allan Leinwand To Speak At Networld+Interop.

Business Editors/High-Tech Writers

Networld+Interop 2002 Las Vegas

ADVISORY...for Tuesday (May 7)

--(BUSINESS WIRE)

    WHAT:   Proficient Networks President and CEO, Allan Leinwand will
            speak at Networld(SM)+Interop(R) 2002 in Las Vegas, NV on
            May 7, 2002.

          --  Panel Discussion:

              The Advent of Intelligent Routing: As the Internet takes
            on the challenge of becoming a voice and (streaming) data
            infrastructure, it must also assume the burden of
            reliability, manageability and predictability we ascribe
            to the global telephone network. To do so, routing must
            become sensitive to traffic fluctuations and adapt as
            quickly to congestion as it now does to temporary
            communications failures. Learn more about a routing
            fundamental -- intelligence -- whose time has finally
            come.

              Speaker:    Allan Leinwand, President and CEO,
                        Proficient Networks

              Location:   Las Vegas Convention Center Ballroom C,
                        Las Vegas, NV

              Date:       May 7, 2002, 3:15pm - 4:30pm

          Also at Networld+Interop 2002:

          --  Proficient Networks Reception

              Location:   The Venetian Hotel Suite 3308
                        3355 S. Las Vegas Blvd, Las Vegas, NV

              Date:       Tuesday, May 7, 2002: 5:00 p.m. - 7:00 p.m.