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故障现象 电话机摘机后,使用指示灯微亮、拨号音很小,接收和发送声音几乎都听不见,但能拨号;有呼入时,接收振铃信号及来电显示正常。 分析检修 从该电话机拨号、接收铃流信号及来电显示正常分析,故障多发生在通话电路公共部分。
Symptom After the phone is off-hook, the indicator light is on, the dial tone is very small, the receiving and sending voice can hardly be heard, but the number can be dialed; when incoming call, the incoming call signal and caller ID are normal. Analysis and maintenance dial from the phone to receive ringing signal and caller ID normal analysis, the fault occurred in the public part of the call circuit.