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Sonus Signs on New Distribution Partners in Indonesia and Japan

WESTFORD, Mass., November 3, 2003 – Sonus Networks (Nasdaq: SONS), a leading provider of carrier packet voice infrastructure solutions, today announced it is further expanding its presence in Asia through sales partnerships with solutions integrators in Indonesia and Japan. Sonus has signed distribution agreements with PT. Abhimata Citra Abadi to sell and support the Sonus product line in Indonesia and with Commuture Corp. to market Sonus' solutions to service providers in Japan.

"The addition of PT. Abhimata and Commuture as new distribution partners further strengthens our presence in Asia, which is a key region for us," said Michael O'Hara, vice president, marketing, Sonus Networks. "We have experienced success in a number of Asian countries to date, and look forward to working with these partners to build on that success and drive the deployment of carrier packet voice networks throughout the region."

PT. Abhimata Citra Abadi has been a leading supplier of internetworking and communications products and services in Indonesia since 1989. PT. Abhimata Citra Abadi provides a wide range of services including network systems integration, business application development, system design and planning, product training, and technical support and maintenance.

Commuture Corp. is a leading systems integrator providing telecommunications solutions and services for converged network infrastructure, PSTN, transmission networks, access networks and broadband wireless. Commuture Corp. has an extensive track record in developing network infrastructure projects throughout Japan and in other regions around the world.

About Sonus Networks

Sonus Networks, Inc., is a leading provider of packet voice 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, residential access and Centrex, tandem switching, and IP voice termination, as well as enhanced services. Sonus' award-winning 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 Westford, Massachusetts. Additional information on Sonus is available at http://www.sonusnet.com.

This release may contain projections or other forward-looking statements regarding future events or the future financial performance of Sonus that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results. Readers are referred to the "Cautionary Statements" section of Sonus' Quarterly Report on Form 10-Q, dated August 13, 2003 and filed with the SEC, which identifies important risk factors that could cause actual results to differ from those contained in the forward-looking statements. These risk factors include, among others, the adverse effect of recent developments in the telecommunications industry, the weakened financial position of many service providers, Sonus' ability to grow its customer base, dependence on new product offerings, market acceptance of its products, rapid technological and market change and manufacturing and sourcing risks. In addition, any forward-looking statements represent Sonus' views only as of today and should not be relied upon as representing Sonus' views as of any subsequent date. While Sonus may elect to update forward-looking statements at some point, Sonus specifically disclaims any obligation to do so.

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