SONUS NETWORKS WINS INFOVISION AWARD FOR SECOND CONSECUTIVE YEAR 

Company’s PSX6000 SoftSwitch Takes Top Honors in Public Networks Category

WESTFORD, Mass., August 29, 2000 – Sonus Networks (Nasdaq: SONS), a leading provider of voice infrastructure solutions for the new public network, today announced that it has been named a recipient of the InfoVision 2000 Award.  Sonus’ PSX6000 SoftSwitch was chosen from among hundreds of nominees for the exclusive awards, which honor the information industry’s most innovative products and services.

The InfoVision 2000 Awards are presented by the International Engineering Consortium (IEC) and recognize technologies, applications, products and services judged to be the most unique and beneficial to the industry.  The awards also acknowledge corporations and individuals for innovative contributions and developments that have proven important to society.    

"It is a great privilege to receive the InfoVision 2000 Award, and we are particularly pleased to have been honored by the IEC for our contributions to the information industry for two straight years,” said Hassan Ahmed, Sonus’ president and CEO.  “Our PSX6000 SoftSwitch has been recognized by carrier customers as the industry’s call management platform of choice, and this award highlights the leadership position we’re taking in building the new public network.”

Sonus Networks’ PSX6000 SoftSwitch is a call management server that supports the full range of carrier switching requirements while providing an open approach through which new services can be created easily and implemented quickly.  It allows carriers to deploy a converged network infrastructure with the highest levels of scalability, performance, reliability and voice quality.  As a central component of the Sonus Open Services Architecture (OSA), the PSX6000 works seamlessly with the Sonus GSX9000 Open Services Switch and the SGX2000 SS7 Signaling Gateway.  It also interfaces with third-party feature servers and application servers to deliver a range of revenue-generating enhanced services.

The awards will be presented at the InfoVision Awards Ceremony and Luncheon on Wednesday, October 18, during the National Communications Forum (NCF) and InfoVision 2000 conference.  NCF-InfoVision 2000 is being held October 15-19, 2000 in Chicago. 

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 marketshare 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

PSX6000, GSX9000, SGX2000 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.