Intelligent P2P VoIP through Extension of Existing Protocols

The main propose of the Intelligent P2P VoIP architecture through extension of existing protocols is to enable a VoIP user tracking and calling other users anywhere on the Net using just their e-mail IDs. We propose a pure P2P VoIP architecture which decentralizes the mechanism of call establishment and termination as well as user tracking without going through a centralized VoIP proxy or redirection server. We extend and adapted asynchronous multimedia communication protocols (namely, SMTP) and VoIP related protocols (namely, SIP) to facilitate synchronous voice communication over the Internet. Callee's location is probed intelligently using his or her SMTP server log. Present VoIP systems are generally based on a hybrid architecture where a SIP proxy or redirection server controls every voice call. Since all voice calls are mediated by a central server, such a system suffers from scalability and a single point of failure problems. Moreover, in such a system users are tied with a particular VoIP service provider. Decentralization of the existing hybrid architecture into the proposed architecture, explained in this report, frees the user from having to subscribe to a VoIP provider. In this research, we focus on using open source software components to setup an enterprise VoIP system to demonstrate the proposed architecture. Nevertheless, the approach can be extended easily beyond the enterprise intranet.