| 摘要 |
PROBLEM TO BE SOLVED: To respond to an incoming call by a terminal on the desired side without complicated settings by a user at the use of an IP telephone service using the same telephone number between a mobile terminal and a fixed telephone terminal.SOLUTION: A telephone device 10 (a control unit 111 of a main device 11), on receiving a substitutive registration request from another telephone device (a mobile terminal 20), requests an IP telephone server 30 to perform registration in place of the mobile terminal 20. When there is an incoming call to the telephone number and on receiving an incoming notification from the IP telephone server 30, the telephone device 10 transmits the incoming notification to the mobile terminal 20 using a push function. |
