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徒弟:前一讲我们介绍了无绳电话机单元电路的接收单元,这一讲请师傅介绍一下无绳电话机的接口及控制单元。师傅:下面我以实际无绳电话机的接口及控制电路为例介绍其工作原理及常见故障检修。徒弟:在无绳电话机中接口电路有何作用! 师傅:在无绳电话机中,接口电路完成将市话信号(包括 9OV 25Hz的振铃信号、拨音音、回铃音、忙音、通话信号等)通过接口电路送入发射单元调制(有关发射单元将在下一讲讲述);将拨号信号(包括脉冲的、双音频的)以及通话信号送入市话外线。
Apprentice: We talked about the previous introduction of the cordless telephone unit circuit receiving unit, this master asked about the cordless telephone interface and control unit. Master: Here I use the actual cordless phone interface and control circuit as an example to introduce its working principle and common troubleshooting. Master: In the cordless phone, the interface circuit to complete the local call signal (including 9OV 25Hz ring signal, tone sound, ring back tone, busy tone, call signal, etc.) Send through the interface circuit into the transmitter unit modulation (about the launch unit will be described in the next talk); the dial signal (including pulsed, dual-audio) and the call signal into the local call.