人们接电话时常犯这样的一个错误,往往不等电话铃声停止,就急忙拿起话筒,久而久之,电话受话器的灵敏度就会降低,杂音会增长,从而影响电话机的使用寿命。这是因为当电话机铃响机,外线约有80V 的振铃电压输入话机,此时若立即拿起话机,振铃电流就会通过耳机受话器,致使受话器 People often make such a mistake when they answer the phone, often waiting for the phone to stop ringing, hurriedly picked up the microphone, over time, the sensitivity of the phone receiver will be reduced, the noise will increase, thus affecting the life of the phone. This is because when the telephone ringing machine, about 80V outside ringing voltage input phone, then immediately pick up the phone, ringing current will be through the headset receiver, causing the receiver