按健电话机拨不断故障的修理赵洁按键电话机常出现拨号以后仍能听到拨号音，即拨不断的故障。产生故障的原因是多方面的，针对目前电话机多采用脉冲发号方式，下面就此方式进行分析。一、振多电压过高产生故障的原因是当对方来电话尚在振铃，铃声未断时，本机用户摘机，导... Press the telephone to dial the constant repair of the fault Zhao Jie phone often appear after dialing still hear the dial tone, that is, continuous dialing fault. There are many reasons for the failure, for the current use of pulse telephone number more way, the following way to analyze. First, the vibration voltage is too high cause of failure is that when the other party to the phone is still ringing, the ringtone is not broken, the local user off-hook, guide ...