A robust architecture for IP telephony systems interconnection

This work presents a robust system's architecture that allows the interoperability between traditional telephony calls and voice over IP originated calls. The architecture here described is modular and flexible, allowing an easy addition of new functionalities. It also generates a scalable and robust final system, as we describe in this paper. The main system's modules are responsible for: signaling conversion, media transmission, address resolution, user location, authorization, authentication and accounting (AAA) and remote management (via SNMP and command line).