Alliance Gives Carriers and ISPs a Time-to-Market Advantage for the Creation and Deployment of Revenue-Generating Services 

WESTFORD, Mass. and FRAMINGHAM, Mass., June 27, 2000 – Sonus Networks, Inc. (Nasdaq: SONS) and Pactolus Communication Software, Inc. today announced that they are working together to help Communications Service Providers and ISPs quickly create and deploy new services through Sonus’ Open Services Architecture (OSA). The combination of Pactolus’ Rapid-FLEX service creation environment (SCE) and Sonus’ PSX6000 SoftSwitch offers carrier customers powerful service creation tools to develop and implement enhanced, revenue-generating services.

Pactolus’ Rapid-FLEX SCE provides an XML-based, "drag-and-drop" visual development environment for the Sonus PSX6000 SoftSwitch. Using the SCE and Pactolus’ eXtensible Telephony Markup Language (XTML), Sonus’ customers will be able to quickly create and deploy new services on the Sonus SoftSwitch, including specialized routing, custom call flows, voice announcements and calling services.

"The Pactolus Rapid-FLEX SCE provides a highly sophisticated, yet easy-to-use tool for rapidly generating enhanced services applications," commented Mike Hluchyj, founder and chief technology officer, Sonus Networks. "The SCE, combined with our powerful Open Services Architecture, will help service providers gain a time-to-market advantage in creating and delivering new softswitch-based services." 

"We share Sonus’ vision for creating the new public network and look forward to working with them and their customers to achieve this goal," said Dave Horton, president and CEO of Pactolus. "The Rapid-FLEX XML-based service creation environment gives carriers the ability to introduce new services in a quick, cost-effective manner which is critical for success in today’s highly competitive service provider market." 

About Pactolus Communication Software

Pactolus Communication Software, Inc., is a leading supplier of XML-based enhanced service platforms, applications and service creation solutions for next-generation communications networks. Pactolus’ RapidFLEX application server and eXtensible Telephony Markup Language (XTML) bring the Internet’s service delivery model to next-generation enhanced communications services. With XTML, Pactolus enables service providers to rapidly create and deploy value-added business-to-business and residential enhanced services that are customized to meet each subscriber’s specific needs. More information about Pactolus is available at www.pactolus.com. 

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. 

This press release may contain forward-looking statements relating to future events or future financial performance that involve risks and uncertainties. These statements are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934. These statements are only predictions and actual results could differ materially from those anticipated in these statements based upon a number of factors including those risk factors identified in Sonus Networks’ Prospectus dated May 24, 2000.

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