SIP APPLICATION SERVER, SIP COMMUNICATION SYSTEM AND METHOD OF DISCONNECTION FROM SIGNAL PATH

摘要

PROBLEM TO BE SOLVED: To disconnect an SIP application server from a signal path. SOLUTION: An SIP application server 100c makes disconnection declaration PB1 indicating disconnection from a signal path. In the disconnection declaration PB1, a disconnection declaration signal is transmitted to an SIP application server 100d and an SIP application server 100a at the end points of the signal path (steps B1a, B2a and B3a). When an error response is transmitted from the SIP application server 100a or 100d to the disconnection declaration signal (steps B3c and B2c), the SIP application server 100c interrupts disconnection from the signal path (PB1a). When a success response is transmitted from the SIP application servers 100d and 100a (steps B1b, B2b and B3b), disconnection processing PC from the signal path is performed. COPYRIGHT: (C)2011,JPO&INPIT