| 摘要 |
PURPOSE:To output the voice of an opposite party from a speaker in the transmitter-receiver having a VOX function. CONSTITUTION:The transmitter-receiver is provided with a reception circuit 12 receiving a radio wave from an opposite equipment to provide the output of a voice signal from an opposite party, and a speaker 21 receiving the voice signal from the opposite party and outputting the voice signal, and a transmission circuit 15 sending its own voice signal from the microphone 31 to the opposite equipment, and also with a detection circuit 27 detecting the presence of a signal outputted from the microphone 31 and a detection circuit 23 detecting the presence of a signal fed to the speaker 21. When the detection circuit 27 detects the presence of the signal from the microphone 31, the transmission mode is set as the operation mode based on the detection output. When the detection circuit 23 detects the presence of the signal to be fed to the speaker 21, the reception mode is selected for the operation mode indepnedently of the detection output of the detection circuit 27 based on the detection output. |
