ADVISORY/ NMS Communications, RADVISION and IntelliNet Technologies Announce SS7/IP Convergence Seminar.

Business/Technology Editors

ADVISORY...for Wednesday (Aug. 29)

--(BUSINESS WIRE)

Companies Team Up to Offer Industry's Most Comprehensive Look at the

Convergence of SS7 and IP

NMS Communications (NASDAQ: NMSS), the leading supplier of technology for tomorrow's networks, RADVISION (NASDAQ: RVSN), the source of award winning, industry-standard products and technology for real-time voice and video communication over IP (V2oIP(TM)), and IntelliNet Technologies, the leading global provider of SS7/IP development products and services for the wireless, fixed and emerging IP telephony marketplace, have joined forces to offer the industry the most comprehensive look at the opportunities and advantages offered by converging SS7 and IP networks.

WHO:   NMS Communications, RADVISION, and IntelliNet Technologies

WHAT:  A limited attendance seminar on the latest advances in SS7/IP
       convergence

WHEN:  Wednesday, August 29th. Registration begins at 1:30 PM (CMT)

WHERE: The Shakespeare Room, Omni Richardson Hotel, Dallas, Texas

HOW:   Visit http://www.ss7oip.com/news/demoapply.shtml for more
       details and to sign up.

"The Latest Advances in SS7 and IP Convergence," a complimentary seminar for senior executives, business managers, and engineering managers, details the opportunities and advantages of combining the security and reliability of an SS7 network with the flexibility and cost-efficiency of an IP network.

NMS Communications' Director of Technical Specialists, Marc Orange, will present a detailed look at SS7 from its birth to its present and future connection with VoIP. RADVISION's Director of Software Sales, Jeff Hoefgen, will follow up with an in-depth look into VoIP and its supported protocols. IntelliNet's President & CEO, Anjan Ghosal, will conclude by discussing how the two networks tie together, with heavy emphasis on the opportunities and technical challenges of SS7oIP.

Attendees will receive an SS7/IP educational package and have a chance to network with fellow attendees while enjoying an open bar and a Tex-Mex style buffet. Representatives from all three companies will be on hand to answer questions.

"NMS is pleased to partner with RADVISION and IntelliNet Technologies to offer this important and timely seminar because it will illustrate how the convergence of SS7 and IP presents a rich opportunity for our customers to create new sources of revenue--by offering new services to their customers," said Bob Schechter, Chairman and CEO of NMS.

"SS7 is the most widely deployed signaling technology for circuit switched networks today. It is critical to understand how SS7 and IP convergence will impact telecommunications and how these technologies can be leveraged to deliver compelling services to customers," said Gadi Tamari, CEO of RADVISION.

Anjan Ghosal, President and CEO of IntelliNet, added, "The dynamics, flexibility and cost advantages of the packet-switched IP networks enable service providers to rapidly deploy new applications. During the seminar, we will review how creative use of SS7/IP convergence technologies and new initiatives like SIGTRAN make applications like In-Building Wireless, SMS Offload, Location Services, and Wireless Softswitch a reality."

About NMS Communications (formerly Natural MicroSystems)

NMS Communications (NASDAQ: NMSS) strives to lead in the design, development and distribution of hardware and software for the communications industry's most advanced solutions. Using NMS products and services, the world's leading networking and telecommunications suppliers get their solutions to market faster, and at lower costs.

NMS supplies the essential technologies for network-based IP media services, voice Web applications, speech-driven enterprise solutions such as customer relationship management (CRM), and packet voice and broadband access services, including voice over IP (VoIP), voice over DSL (VoDSL) and voice over wireless local loop (VoWLL).

NMS Communications: Technology for Tomorrow's Networks. Visit www.nmscommunications.com for more information.

About RADVISION

RADVISION (NASDAQ: RVSN) is a leading provider of products and technology for real-time voice, video, and data communications over packet networks; this includes the Internet and other Internet Protocol (IP) based networks. Recognized universally as the experts in real-time Voice and Video over IP (V2oIP), RADVISION offers the broadest and most complete set of enabling technology and networking systems needed to enable enterprises and service providers to migrate their voice and video communications from traditional telephone networks to new converged networks. Today, hundreds of thousands of end-users around the world communicate over next-generation networks, using IP-centric products and solutions built around RADVISION products and technology. RADVISION's multi-protocol software toolkits for developers of IP communications include: SIP, MEGACO, MGCP, and H.323; RADVISION's V2oIP networking products include: gateways, conferencing bridges, and gatekeeper applications. For more information, please visit our website at: www.radvision.com.

About IntelliNet Technologies, Inc.

IntelliNet Technologies, Inc. (Melbourne, FL) is a premier global provider of superior SS7/IP development products and services for the wireless, fixed and emerging IP telephony marketplace. IntelliNet's product line includes a multi-protocol, openly flexible SS7oIP Signaling Gateway, the IntelliSS7(TM) Application Development Environment (ADE) and a strong Professional Services group handling product customization and other specially built SS7/IP applications. More information about IntelliNet's products can be found at: www.ss7oip.com.

This press release contains forward-looking statements that are subject to risks and uncertainties. Factors that could cause actual results to differ materially from these forward-looking statements include, but are not limited to, general business conditions in the industry, changes in demand for products, the timing and amount or cancellation of orders and other risks detailed from time to time in RADVISION's filings with the Securities Exchange Commission, including RADVISION's Form F-1 registration statement and Form F-20 Annual Reports.

With regard to NMS Communications, statements in this document expressing the beliefs and expectations of management regarding future performance are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on management's expectations as of the date of this document and are subject to uncertainty and changes in circumstances. Actual results may differ materially from these expectations due to risks and uncertainties including, but not limited to, a continued slowdown in communications spending, quarterly fluctuations in financial results, the availability of products from vendors and other risks. These and other risks are detailed from time to time in the Company's filings with the Securities and Exchange Commission, including the Company's annual report on Form 10-K for the year ended December 31, 2000. In addition, while management may elect to update forward-looking statements at some point in the future, management specifically disclaims any obligation to do so, even if its estimates change.

NMS Communications is a trademark of NMS Communications Corporation. All other product or corporate references are trademarks or registered trademarks of their respective companies.