| 摘要 |
PURPOSE:To attain the reception of an emergency call sent from a mobile station with a base station without being affected with crosstalk and interference by generating a pulse signal for a prescribed time interval after the start of transmission of the mobile station and stopping the transmission of the mobile station for a prescribed time when no voice and signal input is detected. CONSTITUTION:An input detection circuit 7 detects whether or not a voice signal or a signal (c) is inputted and outputs a detection signal (d). The detection signal (d) is fed to a press-to-talk control circuit 8, from which a press-to-talk control circuit output signal (e) is outputted. After the lapse of a prescribed time, the press-to-talk control circuit output signal (e) goes to an L level and the operation of a transmission section 12 is interrupted. Thus, when a mobile station 71 sending an emergency call to a base station 10 exists for this period, the command console 60 of the base station in receives the emergency call without being affected by crosstalk and interference. |
