1.当你的电话无声时,要检查话筒及传输线是否脱落,话机接线盒内各接头是否接妥,话机外线插座是否松动。排除上述故障或更新线路,毛病往往即可解决。 2.当电话只能接听而不能拨打时,可检查P/T选择开关的选择是否正确。如电话所接交换机的拨号方 1. When your phone is silent, it is necessary to check whether the microphone and the transmission line are off, whether the connectors in the terminal box of the telephone are properly connected, and whether the external socket of the telephone is loose. To rule out the above failure or update lines, problems can often be solved. 2. When the phone can only answer and can not dial, check the P / T selection switch is correct. Such as the telephone dial-up party to the switchboard