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SUPERCOMM 2003 Booth #21347, Hall B

WESTFORD, Mass., May 27, 2003 – Sonus Networks (Nasdaq: SONS) will highlight technology trends in packet voice infrastructure and related services at the SUPERCOMM 2003 show being held next week. In the Sonus Networks exhibit, the company will feature live demonstrations of its packet-based voice solutions and enhanced services, including hosted PBX, voice conferencing, presence management, prepaid calling and messaging.  The SUPERCOMM 2003 conference will be held June 1-5 at the Georgia World Congress Center in Atlanta, Georgia, with the exhibitions open June 3-5.

Executives from Sonus are taking an active role in the educational portion of the conference.  Sonus' packet voice experts will be participating in the following conference sessions:

Monday, June 2, 9:30 am – 4:30 pm 
Session: Mobile Data and IP Services Come to the Rescue of Mobile Revenues
Speaker: Bob Dye, vice president, strategic marketing

Monday, June 2, 10:00 am – 11:30 am 
Session: Network Protocols: What, When & Where
Speaker: Bob Dye, vice president, strategic marketing

Tuesday, June 3, 2003, 2:15 pm – 3:45 pm
Session: Practical Approaches to Network Operations Migration: Improving Operations and Profitability
Speaker: Bruce Trvalik, director, product management

Wednesday, June 4, 9:15 am – 10:45 am
Session: OSS/BSS Migration for IP Services
Speaker: Bruce Trvalik, director, product management

Thursday, June 5, 9:30 am – 4:30 pm 
Session: Architecture Strategies for Next-Generation Broadband Networks
Speaker: Bob Dye, vice president, strategic marketing

SUPERCOMM is the premier annual communications and information technology exhibition and conference.  Additional information on SUPERCOMM 2003 can be found at www.supercomm2003.com

About Sonus Networks

Sonus Networks, Inc., is a leading provider of packet voice infrastructure products for the new public network.  With its Open Services ArchitectureTM (OSA), Sonus delivers end-to-end solutions addressing a full range of carrier applications, including trunking, residential access and Centrex, tandem switching, and IP voice termination, as well as enhanced services.  Sonus' award-winning voice infrastructure solutions, including media gateways, softswitches and network management systems, are deployed in service provider networks worldwide.  Sonus, founded in 1997, is headquartered in Westford, Massachusetts.  Additional information on Sonus is available at http://www.sonusnet.com.

Open Services Architecture is a trademark of Sonus Networks.  All other company and product names may be trademarks of the respective companies with which they are associated.