SUPERCOMM 2000, Cisco Ecosystem Partner Pavillion, Booth #827 Hall A

ATLANTA - June 6, 2000 - NetSpeak. Corporation (NASDAQ: NSPK), a leading provider of advanced telephony solutions for Internet Protocol (IP) networks, today announced that it has enhanced its Voice Virtual Private Network (VPN) solution to allow telecom service providers to better serve their business customers. The solution is being showcased at SUPERCOMM 2000 as part of NetSpeak's participation in Cisco's Ecosystem Partner booth.

Using NetSpeak's carrier-grade Voice VPN solution, service providers can now offer their business customers a single source for all their global communications needs - including voice, fax and data - across a shared, managed IP network. Eliminating expensive Public Switched Telephone Network (PSTN) lines, the NetSpeak Voice VPN solution allows carriers' business customers to place calls between corporate headquarters, remote offices and branch offices via the VPN.

In addition to its basic services, recent enhancements to NetSpeak's Voice VPN solution allows service providers to offer these businesses a range of new, previously unavailable services.

For instance, NetSpeak's Voice VPN solution provides carriers with the flexibility to support multiple enterprises using a common gateway - thus allowing carriers to save money by more effectively using bandwidth and resources. This means carriers can place one common gateway in a central office or a large office complex to support several different business customers instead of having to place a gateway within each customer's premises.

NetSpeak's Voice VPN solution is uniquely scalable in that it allows private dialing plan information to be supported across multiple domains. For instance, as a carrier expands its network to accommodate the enterprise customer's requests for additional service, the integrity of the enterprise's customized dial plan can still be maintained, even across multiple H.323 zones and domains.

NetSpeak's Voice VPN solution also allows carriers to offer their enterprise customers tiered service pricing linked to quality of service and the type of IP network used. For example, an executive could hit "7" to have his or her calls travel across the public Internet at a low cost per minute. In contrast, that executive would hit "8" to access the dedicated IP line when dialing out to his or her most important customer for guaranteed quality of service.

In addition, NetSpeak's Voice VPN solution allows service providers to offer special rate plans between customers and their frequently called business partners, such as suppliers, with shared dial plans on the same VPN - allowing them to do business more cost-effectively through a type of "telecom Extranet."

NetSpeak's Voice VPN solution also enables enterprises that have telecommuters or international travelers to benefit from the VPN's remote access features. Pre- or post-paid calling cards give business staff access to the carrier's remote Point Of Presence (POP) and then onto the IP backbone, bypassing PSTN long-distance charges.

In addition, a service provider's corporate VPN service package could include off-net calling by offering long-distance call termination worldwide, across existing remote POPs, or by partnering with other service providers for global termination.

"Increasingly, businesses are turning to managed network service providers to operate and maintain their complex corporate networks, thus freeing their resources to concentrate on their core business concerns," said Michael Rich, president and CEO, NetSpeak Corporation. "Applications such as NetSpeak's Voice VPN will play a vital role in helping service providers leverage their IP networks and compete more effectively for lucrative business customers. NetSpeak's recent expansion of its Voice VPN offering makes it the most scalable, reliable and innovative offering on the market today."

The Voice VPN application is supported by NetSpeak's leading Gatekeeper and Route Server, both key elements of NetSpeak's award-winning iTEL architecture. The Gatekeepers have been designed to meet the performance, reliability and scalability requirements that carriers demand. One Gatekeeper handles more than 100 calls per second and provides N + 1 fail over without losing calls through an implementation of the Alternate Gatekeeper feature. In addition, NetSpeak's architecture easily scales to handle traffic loads in the thousands of E1/T1s by simply adding additional NetSpeak Infrastructure Gatekeepers as well as Route Servers.

The NetSpeak Route Server is unique in that it focuses solely on managing the resources in the network and determining route priorities across the network, separating these functions from Gatekeeper functions such as Authentication, Authorization and Accounting (AAA).

Because the NetSpeak Route Server manages the VoIP network ports, carriers can add multiple Application or Feature Servers (e.g., Application Gatekeepers) to the physical network, yielding improvements in port utilization and better return on capital by allowing several applications to run across a common infrastructure. For instance, with NetSpeak's Voice VPN application, all of the VPN business user groups' custom dial plans can be configured and maintained in one location, thus consolidating maintenance and provisioning activities.

The NetSpeak iTEL architecture is the flexible software platform for all NetSpeak products, supporting multiple H.323 VoIP networking models today, with SIP and MGCP products currently under development. NetSpeak also serves as part of the Cisco New World Ecosystem, ensuring its solutions can be easily integrated into a carrier's Cisco Powered Network.

"We are very pleased NetSpeak is showcasing its enhanced VPN solution at our partner Pavillion," said Steve Hoch, director of marketing, for Cisco's Service Provider Line of Business. "Their ability to quickly customize this solution in response to customer needs validates the benefits of a multi-vendor business model such as our New World Ecosystem, which allows best of breed vendors to work together to meet customer expectations."

Founded in June 1999, the Cisco New World Ecosystem is a community of technology partners enabling service providers to rapidly deploy innovative networking services. Cisco and its partners offer a wide range of solutions for Packet Telephony, Voice Applications, OSS/BSS, Broadband, Solutions Integration / Deployment and a broad set of VPN solutions. Cisco New World Ecosystem partners support open, standards-based architectures and a shared commitment to interoperable, multi-vendor implementations. Membership in the Cisco New World Ecosystem Partner Program is offered to companies that demonstrate leading-edge technical capabilities and present mutual business opportunities.

Availability

NetSpeak's VPN Solution is being demonstrated exclusively at SUPERCOMM 2000 in Atlanta, June 6 through June 8. Some enhancements are available now; all of the outlined solution enhancements to NetSpeak's Voice VPN will be made available by late summer, 2000. For more information, visit www.netspeak.com.