| 摘要 |
PURPOSE:To make the emergent communication easy, by providing a function which amplifies the receiver tone of a telephone set as it is without passing through a demodulator and outputting the result with addition of a prescribed noise, for a sound coupler. CONSTITUTION:An output section of a microphone 6 of a sound coupler (ACC) 1 receiving emergent communication is provided with an amplifier. The system is normally made up of the microphone 6, a microphone 7, a demodulator 1a, a modulation section 1b, and an interface 1c and makes data communication through a receiver. When one of data communication desires urgent communication to a remote station, a personnel 12 of the station takes up a receiver 5 of the ACC and makes communication in voice, then communication to the other station is enabled via a speaker 9. Thus, in case of normal data communication, the voice can be heard, and the stop of data communication due to line failure can be recognized. |
