SONUS NETWORKS EXECUTIVES TO PRESENT AT
UPCOMING INVESTOR CONFERENCES 

WESTFORD, Mass., May 6, 2003 – Sonus Networks (Nasdaq: SONS) today announced that company executives will participate in the following financial conferences during the second quarter:    

Goldman Sachs Ninth Annual Telecom Retreat
Santa Barbara, CA
Four Seasons Resort
Monday, May 12, 2003
2:30 pm – 3:15 pm PDT
VoIP Panel Discussion
Speaker: Hassan Ahmed, president and CEO

Tuesday, May 13, 2003
9:15 am – 10:00 am PDT
Company Presentation
Speaker: Hassan Ahmed, president and CEO

Massachusetts Telecom Council Tenth Annual Investors Conference
Boston, MA
Westin Copley Place
Thursday, May 15, 2003
4:20 pm – 5:00 pm EDT
Company Presentation
Speaker: Steve Nill, CFO

Wachovia Securities' Thirteenth Annual Nantucket Conference
Nantucket, MA
Harbor House Village
Friday, June 27, 2003
11:45 am – 12:15 pm EDT
Speaker: Mike Hluchyj, founder and CTO

A full schedule of Sonus Networks' investor activities is available on the Sonus Networks Investor Relations site at http://www.sonusnet.com/investor.cfm.

About Sonus Networks
Sonus Networks, Inc., is a leading provider of packet voice infrastructure products for the new public network.  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.

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