Sonus Experts Present On New Trends in IP-Based Voice Solutions and the Industry's Migration to an IP Multimedia Subsystem Architecture

CHELMSFORD, Mass., May 31, 2006 – Sonus Networks (Nasdaq: SONS), a leading supplier of service provider Voice over IP (VoIP) infrastructure solutions, announced that at GLOBALCOMM 2006 (Booth #33077), the company will showcasing its award-winning suite of next generation IP-based solutions, including a variety of communications applications supported by Sonus' industry leading IP Multimedia Subsystem (IMS)-ready architecture. Delivering on the promise of IP-based voice technologies first, Sonus will demonstrate a variety of new applications that give service providers the ability to provide their customers with greater levels of customization, personalization, and efficiency in their communications experience.

In addition to Sonus' presence in the exhibit hall, executives from the company will deliver a variety of educational presentations highlighting key trends and issues in the evolution of communications networks towards an all-IP architecture.

Sonus speakers and topics scheduled to appear at GLOBALCOMM 2006 include:

Monday, June 5, 2006, 10:30 am - 11:15 am
Session: Telephony Magazine's IP Summit: Wireless IP - The Future of Mobility
Speaker: Bruce Trvalik, Director of IMS Strategy, Sonus Networks
More Information: http://www.globalcomm2006.com/register/summits/telephony.cfm

Wednesday, June 7, 2006, 11:30 am - 12:45 pm
Session:IEC Program: IP Multimedia Subsystem: Myths Vs. Realities
Speaker: Steve Edwards, Chief Marketing Officer, Sonus Networks
More Information: http://www.iec.org/events/2006/iec_forums/conference/w30f.html

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.