| 摘要 |
PURPOSE:To simplify the line connection control and to decrease the time required for line connection by transmitting a call signal via a control channel and a call response signal through a talking channel. CONSTITUTION:When an operation section 1 makes a call from a terminal station, a channel CH designation signal 8 is generated from a control section 2 to a receiver 4 and an electric field information signal 9 is given from the receiver 4 to a room CH retrieval section 5 at the CH. When the received input voltage of a signal 9 is at a specified value or below at the retrieval section 5, it is decided that the CH is an idle CH. When the idle CH is found out, the control section 2 input a call signal added with a CH designation signal switching the CH to the former CH and an incoming address signal to a transmitter 3 via the control CH after its output is transmitted from an antenna 7 via a common device 6, the idle CH is in standby. An incoming station receiving the call signal whose incoming address is coincident by the control CH switches the CH to the designated talking CH, a call response signal is returned via the talking CH, and when the calling side receives the calling response signal, then starts talking or data transmission. |
