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HA893(Ⅱ)P/T电话机常见故障如下: (1)故障现象:拨号音不断,脉冲发不出去。 分析与检修:如图1所示,摘机后,交换机送来
HA893 (Ⅱ) P / T telephone common faults are as follows: (1) Symptom: dial tone continuously, the pulse can not go out. Analysis and Overhaul: As shown in Figure 1, after off-hook, the switch is delivered