| 摘要 |
To perform communication with a communication path not unnecessarily going through a relay device such as a router. Under an environment in which a first network and a second network are connecting via a relay device, in a case of information used for establishing of a communication path between a call-origin terminal and a call-destination terminal sent by one among the call-origin terminal and the call destination terminal to the other thereof, being forwarded from the relay device, contents of the information used for establishing of the communication path are overwritten so that the communication path between the call-source terminal and call-destination terminal is established with a path not going through the relay device, and the information thus overwritten is sent to the other one among the call-origin terminal and the call-destination terminal, if both of the network in which the call-origin terminal is installed and the network in which the call-destination terminal is installed are the first network. |
