| 摘要 |
PURPOSE:To prevent a radio wave interference of a base station side caused by a faulty mobile station and continuity of transmission while keeping its control channel by a possessor of the mobile station by providing a means utilizing the control channel from the mobile station and generating a voice signal only during the transmission. CONSTITUTION:A control station 1 acts like interfacing an exchange station at the call processing control such as an outgoing and an incoming call, radio base stations 2-1-2-3 form radio zones Z1-Z3 to use a control channel with a mobile station 3, thereby sending and receiving a signal. In the case of accessing the outgoing call and replying the incoming call, the mobile station 3 uses the control channel. The mobile station 3 is provided with a notice tone generating circuit using the control channel and generating a voice signal corresponding to the time of access (transmission). Thus, a fault is found out by a voice signal generated for a long time continuously and the power is interrupted. |
