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SONUS FALL VON BOOTH #1100/1102/1201/1203

COMVERSE FALL VON BOOTH #507/509

Company Achieves Designation as Comverse's Enhanced Services Platform Passes Interoperability Tests with Sonus Products

WESTFORD, Mass., October 15, 2001 – Sonus Networks (Nasdaq: SONS), a leading provider of voice infrastructure solutions for the new public network, today announced that Comverse, a unit of Comverse Technology, Inc. (NASDAQ: CMVT), and the world's leading supplier of software and systems enabling network-based multimedia enhanced communications services, has successfully integrated its enhanced messaging services platform with Sonus' PSX6000 SoftSwitch and GSX9000 Open Services Switch.

Comverse earned the "Powered" partner level of Sonus' Open Services Partner AllianceSM (OSPA) by completing a testing process in the Sonus Interoperability Lab in Richardson, Texas. The OSPA's mission is to help empower standards-based interoperability between applications, third-party vendors and Sonus products. Sonus is also a member of the Comverse Spark AllianceSM Program, which promotes cooperation in the development, marketing and delivery of enhanced multimedia communications solutions based on open standards.

"We are pleased that Comverse has moved to the next level in our OSPA program," said Terri Griffin, vice president, marketing, Sonus Networks. "By demonstrating that its enhanced services platform can interoperate with Sonus' industry-leading voice-over-packet infrastructure, Comverse joins a distinguished list of Sonus partners who can meet carriers' and service providers' next-generation network needs today."

Comverse's enhanced services platform for wireless and wireline networks provides call management capabilities, messaging, information services, and personalized features which benefit subscribers by creating a more functional and personal communications environment. Operators benefit from more completed calls, increased airtime, diversified sources of revenue and increased customer satisfaction and loyalty. Comverse's platform enables operators to provide high demand, leading edge solutions such as unified messaging (UM) and multimedia messaging (MMS) with keypad and voice portal operation. It is easy to customize Comverse's solutions for specific markets such as enterprise and prepaid. Comverse's solutions are fully VoIP-enabled, supplying operators with a flexible migration path from circuit switched to full IP telephony, including simultaneous support of both.

"Carriers are looking to leverage the power of IP to deliver feature-rich, enhanced services that add value to the customer experience," said Gidi Be'ery, vice president of marketing for Comverse. "Our open enhanced services platform enables operators to offer a full array of next-generation capabilities. By teaming with Sonus, we can help carriers accelerate deployment of advanced solutions for converged networks via a smooth and quick migration path from circuit switched to VoIP services."

Sonus' PSX6000 SoftSwitch contains all service definitions, service provisioning, call routing and quality of service requirements. This information is used to control the operation of other network elements to ensure consistent application of network service policies. The GSX9000 Open Services Switch is the industry's leading voice-over-packet central office switch that meets the stringent demands of public carrier networks for interconnectivity, capacity, reliability, scalability and voice quality. The PSX6000 and the GSX9000 are key elements of the Sonus Open Services Architecture^(TM), an open telephony architecture that addresses a full range of carrier applications, including long-distance trunking, Internet call diversion, H.323 termination, and access services.

About Comverse's Spark Alliance Program

The Comverse Spark Alliance Program promotes cooperation in the development, marketing and delivery of multimedia communication solutions. By teaming with innovative partners, Comverse integrates the latest technologies, applications and content into existing and new Comverse products.

About Comverse

Comverse, a unit of Comverse Technology, Inc. (NASDAQ: CMVT) is the world's leading provider of software and systems enabling network-based multimedia enhanced communications services. More than 375 wireless and wireline telecommunications network operators, in more than 100 countries, have selected Comverse's enhanced services systems and software, which enable the provision of revenue-generating value-added services including call answering with one-touch call return, short messaging services, IP-based unified messaging (voice, fax, and email in a single mailbox), 2.5G/3G multimedia messaging (MMS), wireless instant messaging, wireless data and Internet-based services, voice-controlled dialing, messaging and browsing, prepaid wireless services, and additional personal communication services. Other Comverse Technology business units include: Comverse Infosys, a world leader in the development, manufacture and marketing of intelligent digital voice, video and data recording and content management applications for the security, surveillance, law enforcement and contact center markets; and Ulticom, a leading provider of service enabling network software for wireless, wireline, and Internet communications. Comverse Technology is an S&P 500 and NASDAQ-100 Index company. For additional information, visit the Comverse web site at http://www.comverse.com.

About Sonus' OSPA

Founded on the combination of Sonus' Open Services Partner Alliance (OSPA) Program and the INIP PoweredSM Partner Program from the acquisition of telecom technologies, inc., the OSPA has gained significant industry momentum, with membership of more than 140 leading independent vendors. The OSPA provides a framework that offers service providers end-to-end packet-based network solutions using best-of-breed technologies and applications. The goal of the OSPA is to empower standards-based interoperability between applications, hardware vendors, and the Sonus product suite. An integral part of the Sonus OSPA, the Interoperability Laboratory in Richardson, Texas, is the first in the industry where product interoperability is verified, trial testing is performed, and complete solutions are ultimately produced. To find additional information on the OSPA, including a list of all OSPA partners, log on to http://ospa.sonusnet.com.

About Sonus Networks

Sonus Networks 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.

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 Sonus' Quarterly Report on Form 10-Q, dated August 13, 2001, 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 Company's ability to grow its customer base, dependence on new product offerings, market acceptance of its products, rapid technological and market change, integration risks relating to the acquisition of telecom technologies and manufacturing and sourcing risks.

GSX9000, PSX6000 and Open Services Architecture are trademarks of Sonus Networks. Open Services Partner Alliance and INIP Powered are service marks of Sonus Networks. All other company and product names may be trademarks of the respective companies with which they are associated.