| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system, a server device, a server processing program, and a terminal device registration method which enables a terminal device to be efficiently authenticated and registered even when the terminal device accesses a server which is not in charge of its authentication.SOLUTION: When an SIP server SA1 determines that an SIP terminal T7 which has transmitted a registration request is not its authentication target, the SIP server SA1 retrieves an SIP server SA7 which is in charge of authenticating the SIP terminal T7 via an overlay network ON, causes the retrieved SIP server SA7 to execute authentication processing of the SIP terminal T7, and registers the SIP terminal T7 according to a result of the authentication processing. |
