SESSION INTERNATIONAL PROTOCOL (SIP) SYSTEM, SIP SERVER, SUBSCRIBER TERMINAL, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a new technique which re-register a subscriber terminal registered to some SIP server, to another SIP server.;SOLUTION: In an SIP system, the subscriber terminal registered to some SIP server stores subscriber information containing information for authenticate the correctness of the terminal. In the case of re-registering terminal information, which the terminal has registered to some SIP server, to another SIP server, the terminal takes out the subscriber information stored in the terminal, and transmits the subscriber information and registration request information to another SIP server.;COPYRIGHT: (C)2013,JPO&INPIT