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FALL 2000 VON BOOTH #202

WESTFORD, Mass., September 7, 2000  – Executives from Sonus Networks (Nasdaq: SONS), a leading provider of voice infrastructure solutions for the new public network, will deliver presentations on industry trends and issues during the Fall 2000 Voice on the Net (VON) conference and exhibition being held September 11-14 in Atlanta. In addition to participating in the pre-conference workshop and main conference sessions, Sonus will also be exhibiting at the show, demonstrating its Packet Telephony suite, including the GSX9000 Open Services Switch, the PSX6000 SoftSwitch and the SGX2000 SS7 Signaling Gateway.

Sonus speakers and topics scheduled to appear at the Fall VON conference include:

Monday, September 11, 2000
"PSTN/IP Gateways, Switches and Call Agents"
Speaker: Bob Dye, director, product marketing
9:25-9:45 am

"Managing the Transition to NextGen Architecture"
Speaker: Bob Dye, director, product marketing
11:35 am-12:05 pm

"Commercial SIP Implementations: Gateways"
Speaker: Bob Dye, director, product marketing
1:30-3:00 pm

Tuesday, September 12, 2000
"Venture Capital 101: Getting Start-Up and First Round Funding
Speaker: Rubin Gruber, founder and chairman
2:15-3:20 pm

"H.323 Update"
Speaker: Dale Skran, director, access technologies
2:15-3:20 pm

Wednesday, September 13, 2000
"VON Industry Perspective"
Speaker: Hassan Ahmed, president and CEO
2:30-3:00 pm

Pulver.com’s Fall 2000 VON conference begins on Monday, September 11 with pre-conference workshops and will conclude on Thursday, September 14. All events will be held at the Cobb Galleria in Atlanta. The conference, which targets the interests of both carriers and enterprise users, focuses on the technologies and issues impacting the VON industry today. Additional information on the Fall 2000 VON conference is available at: http://www.pulver.com/von.

About Sonus Networks

Sonus Networks, Inc. is a leading provider of voice infrastructure products for the new public network. Sonus’ solutions enable service providers to deploy an integrated network capable of carrying both voice and data traffic, and to deliver a range of innovative, new services. The Sonus Open Services Architecture (OSA) and award-winning Packet Telephony suite cut the time-to-market for competitive new service products, allowing carriers and third-party developers to expand marketshare and build important new revenue streams. Its highly scalable products fully interoperate with and extend the life and utility of today’s public network. Sonus embodies in its management and staff decades of experience in developing carrier-class voice, data and multimedia solutions for implementation in the world’s largest networks. Sonus, founded in 1997, is headquartered in Westford, Massachusetts. Additional information on Sonus is available at http://www.sonusnet.com.

GSX9000, PSX6000, SGX2000 and Open Services Architecture are trademarks of Sonus Networks. All other company and product names may be trademarks of the respective companies with which they are associated.