Proxy servers and Internet phone service providing method

To provide a proxy server, and Internet phone service providing method. The system comprises a proxy server and a database manager. System manager module includes an internal register, an external module registration, the session management module and signal routing module. Internal registration module provides internal node of the first plurality of registration services for the network service. External registration module registers with the network service provider to provide network services in a plurality of second service network. Session session management module manages a first service network and a second service network and manages shared services between the network nodes registered. A plurality of control signals between the signal session routing module routing a first service network and a second service network. A database for storing information relating to the registered node. Above and VoIP proxy service providing method can provide extended service telephone network having a high quality of service and can significantly reduce the cost of communication services.