An Interoperable signaling solution for IP-based Next Generation Networks

Current VoIP signaling protocols are interoperable with the PSTN SS7 via H.323-to-SS7 or SIP-to-SS7 gateways. As we move toward the Next Generation Network, the PSTN falls away and we work toward carrier-grade VoIP interoperability between H.323, SIP, and other future VoIP signaling protocols. This paper present a Work in Progress to design and implement a solution based on the Internet Protocol itself. 1. VoIP/PSTN Signaling The Public Switch Telephone Network (PSTN) makes use of two distinct layers, a circuit layer and a switched transport layer. The separation of these layers frees up the transport entities from signaling responsibilities as