SentitO Networks and Stealth Communications Expand Partnership to Enable End-to-End VoIP Calls with ENUM Services; sentitO will showcase its ONX product suite at Booth #961.

BOSTON -- sentitO Networks and Stealth Communications today announced the successful interoperability of sentito's Open Network Exchange (ONX) IVG1200 Intelligent Voice and Proxy7 Signaling Gateways with Stealth's Voice Peering Fabric (VPF) ENUM Registry. The combination of ENUM support with sentitO's media and signaling gateways enables VoIP providers to complete voice calls on an all-IP infrastructure, eliminating the need for service providers to traverse the public telephone system with the potential to save billions of dollars annually.

With more than 18 million unique phone numbers enlisted by major carriers and enterprises worldwide to map telephone numbers to SIP or H.323 addresses, the VPF ENUM Registry is the world's first and largest commercial ENUM registry in production. Launched in 2004, the ENUM Registry now completes more than 700,000 phone calls daily with an annual run rate surpassing 200 million calls.

"sentitO's VoIP media and signaling gateways are the first media gateways to interoperate with the Voice Peering Fabric - a critical component in the process enabling ENUM to complete calls between IP and TDM infrastructure," said Shrihari Pandit, President & CEO of Stealth Communications.

"The growth and associated benefits of multi-lateral peering in this marketplace are phenomenal," said Shaun Donnelly, Vice President of Sales and Marketing, sentitO Networks. "VoIP providers are becoming increasingly efficient and cost-competitive as they leverage Stealth's ENUM registry. We remain committed to deliver the necessary features so our VoIP provider customers can deliver innovative IP applications and services that surpass the capabilities of the public telephone system.

sentitO's ONX architecture and product suite provide media and signaling conversion between the PSTN and IP networks, while facilitating new service delivery in a multi-vendor environment. The ONX product portfolio includes the IVG1200 Intelligent Voice Gateway, Proxy7 Signaling Gateway, and PreVision Network Manager.

Located in 9 U.S. cities and London, the Voice Peering Fabric has become the preferred platform and marketplace for Service Providers, Enterprises, and Government Agencies to exchange VoIP traffic and telephony related services. VPF functions as an exchange or meet-point and is designed as a private voice Internet allowing members to establish peer-to-peer connections in a secure, quality-of-service environment. Stealth Communications is a driving force behind the Voice Peering Fabric and Voice Peering Forum, a community with events focused on making end-to-end IP telephony a reality.

About sentitO Networks

sentitO Networks is a leading provider of open and distributed VoIP gateway solutions for telecommunications service providers worldwide. Its' award-winning Open Network Xchange (ONX) architecture enables new, innovative voice services by providing media and signaling conversion utilizing state-of-the-art SIP technology. sentitO is a privately held company with headquarters in Acton, MA. The company has received funding from leading venture capital firms, including Kodiak Venture Partners, Core Capital Partners, Technology Venture Partners, Mid-Atlantic Venture Funds, Inflection Point Ventures, and Columbus Nova. For more information, please visit the company's Web site at www.sentitO.com.

About Stealth Communications, Inc.

Stealth Communications celebrates over a decade in the telecom industry with its successful lines of services based on Ethernet and IP technology. With a positive attitude towards improving telecommunications and endless innovation benefiting communities, Stealth has earned a great reputation in the industry by providing quality services and customer satisfaction. Stealth works closely with its customers and partners who are in the telecom, financial, realty, educational and government sector. For more information on Stealth and the VPF, visit: www.stealth.net and www.thevpf.com.