Sonus Networks to Speak at VON Europe 2005

Sonus Networks (Nasdaq: SONS), a leading supplier ofservice provider voice over IP (VoIP) infrastructure solutions, todayannounced that it is participating in this year's VON Europe 2005conference and exhibition being held May 23-26, at StockholmInternational Fairs in Sweden.

Executives from Sonus Networks will deliver presentations thatprovide a view of the key threats and opportunities of VoIP. Sonus'Chief Marketing Officer, Steve Edwards will provide a perspective onwhat lies ahead for next generation networks.

In addition to participating in the pre-conference workshop andmain conference sessions, Sonus will also be exhibiting at the show.

Sonus speakers and topics scheduled to appear at VON Europeinclude:
Monday, May 23, 2005, 3:00pm - 3:15pm

Session: PSTN/IP Gateways and Softswitches Workshop -
Next Generation Networks: The gateway to a single unified
network.

Speaker: Neil Kinder, Technical Director, Europe,
Middle East & Africa (EMEA)

Wednesday, May 25, 2005, 12:00pm - 12:45pm

Session: Keynote - Harnessing New VoIP Opportunities:
What's Ahead for Next Generation Networks

Speaker: Steve Edwards, Chief Marketing Officer

Pulver.com's VON Europe 2005 conference begins on Monday, May 23,2005 with a pre-conference workshop and will conclude on Thursday, May26, 2005. All events will be held at the Stockholm International Fairin Sweden. VON Europe 2005 brings together, at a senior level, all ofthe players in the converging communications landscape and provides anopportunity to gain a comprehensive and up-to-date understanding ofthe challenges and opportunities ahead.

Further information on VON Europe 2005 can be found at:www.voneurope.com.

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(TM) (OSA), Sonus deliversend-to-end solutions addressing a full range of carrier applications,including trunking and tandem switching, residential and businessaccess, network border switching and enhanced services. Sonus' voiceinfrastructure solutions, including media gateways, softswitches andnetwork management systems, are deployed in service provider networksworldwide. Sonus, founded in 1997, is headquartered in Chelmsford,Massachusetts. Additional information on Sonus is available athttp://www.sonusnet.com.

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