| 摘要 |
PROBLEM TO BE SOLVED: To allow the user to utilize an information service served by a communication enterprise even when no standard protocol is designated for a communication network. SOLUTION: A plurality of communication enterprises serve information services to a communication network to which a called party terminal 10 connects via a communication line 20. A communication enterprise control signal 6 that is sent from a communication network at the arrival of an incoming call includes a caller number to identify a caller, communication enterprise information to identify a communication enterprise, and communication enterprise service information to identify the served service. In the case that a plurality of terminals 15, 16 connect with the called party terminal 10 as slave sets, a function of calling individually a terminal number served by the communication enterprise can be utilized. A communication enterprise information identification means 21 identifies the communication enterprise based on the communication enterprise information and a communication enterprise service information identification means 22 controls a terminal selection circuit 14 based on the communication enterprise service information.
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