| 摘要 |
<P>PROBLEM TO BE SOLVED: To continue communication between terminals even if a fault occurs at a call control server. <P>SOLUTION: An IP connection device of an embodiment is an IP connection device 11 for connecting a terminal to an Internet Protocol (IP) network, to which redundant first and second call control servers are connected, by Session Initiation Protocol (SIP). The IP connection device comprises: transmission means which transmits a call origination message about which the same call destination as a session is specified to the second call control server 42 if the IP connection device has detected a fault of the first call control server 41 in a state in which the session is established between the IP network and the first call control server 41, and a session switching part 105 which replaces linkage information of the session from the first call control server 41 to the second call control server 42 when the IP connection device receives a response message to the call origination message from the call destination. <P>COPYRIGHT: (C)2013,JPO&INPIT |
