| 摘要 |
PURPOSE:To allocate a terminal device provided with a display section by transmitting display control information to an information reception circuit via a talking line from a corresponding information transmission ircuit at a cut-off time of a call signal at incoming to one of plural terminal devices and controlling a display section during call. CONSTITUTION:When a terminal device 111 makes a call and is connected to a terminal device 121, call information is transmitted to a central controller 100 via a subscriber circuit 110. The controller 100 transmits an incoming processing instruction and caller information to subscriber circuit 120. The controller 100 controls a talking network 101 and an autible tone generating circuit 102 and transmits a call tone to a talking signal line 113 of the caller side. The circuit 120 transmits an intermittent call signal to the terminal device 121 and during the interruption period of the intermittent call signal, the circuit 120 transmits the caller information received from the controller 100. Thus, a signal line for display control information is not required except the talking signal line. |
