Sonus Networks' CEO and Chairman Hassan Ahmed to Present at the Bear Stearns 15th Annual Technology Conference

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CHELMSFORD, Mass., June 8, 2004 – Sonus Networks (Nasdaq: SONSE), a leading provider of voice over IP (VoIP) infrastructure solutions, today announced that Hassan Ahmed, Sonus Networks’ chief executive officer (CEO) and chairman, will be participating in the following investor conference:

Bear Stearns 15th Annual Technology Conference
New York, NY
Monday, June 14, 2004, 2:15 pm Eastern
Speaker:  Hassan Ahmed, CEO and chairman
Webcast Link: http://customer.talkpoint.com/BEAR002/061404a_cy/default.asp?entity=sonus

Interested investors can access a live audio webcast of the presentation via the link provided above or on the Investor Relations section of the Sonus Networks website at www.sonusnet.com.  A replay of the webcast will be available 24 hours after the presentation.  A full schedule of Sonus Networks’ investor activities is available on the Sonus Networks Investor Relations site.

About Sonus Networks

Sonus Networks, Inc. is a leading provider of voice over IP (VoIP) 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 and tandem switching, residential and business access, network border switching and enhanced services. Sonus’ 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 Chelmsford, Massachusetts.  Additional information on Sonus is available at http://www.sonusnet.com.

Sonus is a registered trademark of Sonus Networks.  Open Services Architecture, GSX9000, Insignus and Sonus Insight are trademarks of Sonus Networks.  All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.