| 摘要 |
PROBLEM TO BE SOLVED: To enable cooperation control of a wireless telephone terminal while preventing a user from feeling resistance and without requiring a complicated setting operation.SOLUTION: A router RT transfers to a telephone control device 10 a call control message addressed to a network that is transmitted from a wireless telephone terminal 30 to an IP telephone network NW. With respect to a message related to registration processing of the wireless telephone terminal 30 to the IP telephone network NW, among the call control messages addressed to the network that are transferred from the router RT, a transfer controller 14A of the telephone control device 10 changes the transmission source address information included in the message to address information of the own device, and then transmits the message to the IP telephone network NW. With respect to a call control message addressed to the terminal from the IP telephone network NW that is received in response to the message, the transfer controller 14A changes the transmission destination address information included in the message to address information of the wireless telephone terminal 30, and then transmits the message to the wireless telephone terminal 30. |
