Sonus Networks and Dynamicsoft Collaborate to Deliver End-to-End Solutions to Service Providers

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Market Leaders to Provide SIP-Based Infrastructure For Converged Communications Services Over IP-Based Networks

WESTFORD, Mass., and EAST HANOVER, N.J. – March 12, 2001 – Sonus Networks (Nasdaq: SONS) and dynamicsoft Inc. today announced that they will work together to provide carriers with comprehensive solutions to generate new revenue streams from IP-based services. This announcement brings together the strengths of two industry leaders: Sonus, a premier provider of intelligent softswitches and carrier-class media gateways, and dynamicsoft, a leader in communications infrastructure solutions based on session initiation protocol (SIP) -- the standard for voice and other real-time communications over IP-based networks.

Through this relationship, dynamicsoft and Sonus will help carriers respond to the growing demand for new value-added services over IP-based networks. Carriers will now be able to deploy dynamicsoft's infrastructure solutions to extend the reach of their Sonus softswitch platforms to support IP-based communications devices, such as PCs supporting voice applications and the emerging category of IP-based phones. Carriers can also deploy dynamicsoft/Sonus solutions as the infrastructure for delivering a new class of truly converged communications services that combine the innovation and cost-savings of IP-based networks with the PSTN.

"This strategic partnership with dynamicsoft opens the door for our customers to capitalize on the enormous potential of SIP-based networks," said Stephen Collins, vice president, marketing, Sonus Networks. "As an industry leader in carrier-class infrastructure based on SIP, dynamicsoft was a logical choice for us to work with. Together with our respective partners, our companies provide a total solution for delivering innovative new IP-based services."

"Sonus is acknowledged as a worldwide leader in voice infrastructure solutions for the new public network," said Joan Spindel, vice president, marketing, dynamicsoft. "The clear synergies between Sonus and dynamicsoft enable service providers to maximize the value of their IP-based networks by delivering exciting, money-making services that go well beyond what's available on the PSTN or current VOIP networks."

dynamicsoft has already achieved Sonus "Powered" partner status by demonstrating interoperability between its dynamicsoft SIP Proxy Server and Sonus' INtelligentIP Softswitch. The dynamicsoft SIP Proxy Server performs routing and other key functions in SIP-based networks. In addition, Sonus has integrated dynamicsoft solutions into its high performance, highly scalable PSX6000TM SoftSwitch to support SIP-based traffic. The companies will continue to integrate their respective solutions as needed to meet customer requirements.

About Sonus Networks

Sonus Networks, Inc. is a leading provider of voice infrastructure products for the new public network. Sonus' solutions enable service providers to deploy an integrated network capable of carrying both voice and data traffic, and to deliver a range of innovative, new services. The Sonus Open Services Architecture (OSA) and award-winning Packet Telephony suite cut the time-to-market for competitive new service products, allowing carriers and third-party developers to expand market share and build important new revenue streams. Its highly scalable products fully interoperate with and extend the life and utility of today's public network. Sonus embodies in its management and staff decades of experience in developing carrier-class voice, data and multimedia solutions for implementation in the world's largest networks. Sonus, founded in 1997, is headquartered in Westford, Massachusetts. Additional information on Sonus is available at http://www.sonusnet.com.

About dynamicsoft Inc.

dynamicsoft Inc. is the leading provider of carrier-class software infrastructure solutions for packet-based wireline and wireless communications networks. dynamicsoft's interoperable and scalable software solutions enable carriers and communications application service providers to deploy revenue-generating telephony applications and innovative converged services over Internet protocol (IP)-based networks. A private company backed by a premier group of investors, dynamicsoft is based in East Hanover, N.J. and can be reached at www.dynamicsoft.com.

INtelligentIP is a registered trademark and PSX6000 and Open Services Architecture are trademarks of Sonus Networks. All other company and product names may be trademarks of the respective companies with which they are associated.