VOICE CALL CONTINUITY GAGEWAY PROVIDING VOICE CALL CONTINUITY SERVICE ASSOCIATING WIHT INTERNET PROTOCOL BASED PRIVATE BRANCH EXCHANGE AND METHOD OF PROVIDING VOICE CALL CONTINIUITY SERVICE USING THE SAME

摘要

PURPOSE: A VCC(Voice Call Continuity) gate way and VCC service providing method using the same are provided to offer a VCC service to a subscriber of an IP-PBX(Internet Protocol-Private Branch eXchange) network by interlocking the IP-PBX network with an IMS network. CONSTITUTION: A server interlocking module(111) receives a response message including a routing number allocated from an IMS(Internet protocol Multimedia Subsystem) network. The server interlocking module transmits the received response message to an IP based branch exchange. A call processing module(112) transmits the routing number and call attempt information to an IMS(IP Multimedia Subsystem) network through an internet telephone network. The call processing module connects the routing number with the call attempt information in the IMS network in order to transmit a call signal to a second terminal.