SONUS NETWORKS ANNOUNCES PARTICIPATION IN UPCOMING FINANCIAL CONFERENCES

CHELMSFORD, Mass., November 10, 2005 - Sonus Networks, Inc. (Nasdaq: SONS), a leading supplier of service provider voice over IP (VoIP) infrastructure solutions, announced today that company executives will participate in the following upcoming events with the financial community:

Pacific Growth Equities, Top Picks in Tech Conference
New York, NY
Tuesday, November 15, at 3:30 pm ET
Speaker: Bert Notini, president and COO

Piper Jaffray VoIP Summit
New York, NY
Tuesday, November 22, 2005
Speaker: Bert Notini, president and COO

Credit Suisse First Boston Annual Technology Conference
Scottsdale, AZ
Thursday, December 1, 2005, at 1:30 pm MT
Speaker: Hassan Ahmed, chairman and CEO

Lehman Brothers Global Technology Conference
San Francisco, CA
Thursday, December 8, 2005, at 1:30 pm PT
Speaker: Hassan Ahmed, chairman and CEO

Interested parties can listen to the webcast for certain financial conferences and view a full schedule of upcoming events on the Sonus Networks Investor Relations site at http://www.sonusnet.com/contents/corporate/investorrelations.cfm

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 comprehensive IP Multimedia Subsystem (IMS) solution, Sonus addresses the full range of carrier applications, including residential and business voice services, wireless voice and multimedia, trunking and tandem switching, carrier interconnection and enhanced services. Sonus' voice infrastructure solutions are deployed in service provider networks worldwide. Founded in 1997, Sonus is headquartered in Chelmsford, Massachusetts. Additional information on Sonus is available at http://www.sonusnet.com.

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

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