| 摘要 |
PURPOSE:To constantly respond to an incoming from a line wire by stopping the establishment processing of an interphone speech in a master set when a slave set is not brought into a speech state within a prescribed time after other set is called and waiting for the incoming from the line wire. CONSTITUTION:Means 13, 41 for calling the other are disposed in both the master set and the slave and a control means 16 for stopping the processing for establishing the interphone speech carried out by the master set when the slave set is not brought into the speech state during the prescribed time after the other is called and controlling the master set so as to wait for the incoming from the line wire is provided. According to this constitution, after an operating means disposed in a fixed station or a moving station is operated, when the state switching means 14 of the slave set side is not operated within the prescribed time, it is automatically reset to the incoming waiting state. Thereby, when the interphone speech is not executed, the incoming waiting state is obtained to prevent an incoming receiving unable from the line wire due to a malfunction. |
