ITU Telecom World 2003 Stand 4137, Hall 4

SONUS NETWORKS SHOWCASES PACKET VOICE INFRASTRUCTURE AND ENHANCED SERVICES AT ITU TELECOM WORLD

WESTFORD, Mass., October 2, 2003 – Sonus Networks (Nasdaq: SONS) will highlight technology trends in packet voice infrastructure and related services at the ITU Telecom World 2003 show being held October 12-18 at the Geneva Palexpo, Geneva, Switzerland.

The ITU Telecom World 2003 event comprises a major exhibition and a forum. The exhibition features a comprehensive range of telecommunications-related products and services, while the forum will give the floor to CEOs from the sector's key players, industry visionaries and top-level representatives from regulators, development agencies and governments around the globe.

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, prepaid calling and messaging.  Sonus will also be participating in the educational portion of the conference.  Sonus' founder and CTO Mike Hluchyj is scheduled to speak in the following session:

Date/time: Wednesday, October 15, 2003, 4:30 pm – 6:00 pm 
Session: Voice over IP

Additional information on ITU Telecom World 2003 is available at http://www.itu.int/WORLD2003/

About Sonus Networks

Sonus Networks, Inc., is a leading provider of packet voice infrastructure solutions for wireline and wireless service providers. With its Open Services Architecture (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.