Patent ID: 7660293
Filing Date: 2010-02-09
Classification: H04Q

Abstract:
1. A network including: at least a session initiation protocol (SIP) terminal which performs communication by an SIP for realizing connection type communication to perform the communication while confirming connection to a target in an Internet protocol (IP) network; and a private branch exchange which performs a call connection process between the terminals, the network comprising: an SIP system protocol control module incorporated as one of component groups of the private branch exchange and constituted into the module using a mechanism of a back to back user agent (B2BUA) which operates as an acting user agent of a process of the SIP; an additional service providing module which is incorporated as one of the component groups of the private branch exchange and which provides additional services of the private branch exchange in response to a key operation of the SIP terminal; a PBX basic connection process providing module; a first SIP protocol common process module that is communicatively connected between the PBX basic connection process providing module and the additional service providing module, the first SIP protocol common process module also being communicatively connected between the PBX basic connection process providing module and the SIP system protocol control module; a second SIP protocol common process module that is communicatively connected between the IP network and the additional service providing module, the second SIP protocol common process module also being communicatively connected between the IP network and the SIP system protocol control module; and a table connected to the PBX basic connection processing providing module, wherein the PBX basic connection process providing module is communicatively provided between the additional services providing module and the SIP system protocol control module, and wherein the additional services include each of call back service, extension interruption service, and third party control service.