| 摘要 |
PURPOSE:To notify incoming call information to a slave station even when no idle speech channel exists by receiving the information such as a signal representing an incoming call during a busy state sent from a base station and a caller telephone number via a control channel by the slave station and notifying the information in a voice signal or on a display. CONSTITUTION:When an incoming call to a slave station 4 exists while a speech channel is busy, a base station 1 sends a signal notifying a busy transmission line, a 2nd dial signal of a talking destination slave station and a signal urging the transmission of information such as a caller telephone number to the caller, sends the information such as a signal representing a busy state incoming call and a caller telephone number to the slave station 4 via a control channel, and the slave station 4 receives the information and notifies it in voice or display. Thus, when a caller desires to make urgent communication to a slave station subscriber, the slave station subscriber makes contact with the caller through other communication means. |
