| 摘要 |
PURPOSE:To immediately inform the working status of a public line to a user by transmitting display data representing the states of plural lines from a fixed machine to a mobile machine via a control channel. CONSTITUTION:The display data representing the states of the plural lines 101 are transmitted from the stationary machines 106-108 to the mobile machines 109-112 via the control channel of multi-channel access system. The stationary machines 106-108 transmit the display data representing the states of the plural lines 101 to the mobile machines 109-112 on a speech channel by including a signal to be sent first. Also, the stationary machines 106-108 send out the display data representing the states of the plural lines 101 to the mobile machines 109-112 on the speech channel by including the signal to be transmitted first when an incoming call is received. Also, the stationary machines 106-108 transmit the display data representing the states of the plural line wires 101 to the mobile machines 109-112 on the control channel when the incoming call is received and on the speech channel when the call is issued. Thereby, it is possible to immediately display the state of the line. |
