电子、电工师傅,无论是业余或专业修理电话机时,都深知把电话机接在电话线网上提取电压信号,这样很不方便,费时费力。为此本人在这里制作简单实用的电话机快测仪,不需把它接入电话线网,只要接在本装置的输出端子即可。尤其在业余条件下,修理时没有 Electronics, electrician master, whether it is amateur or professional repair phone, are well aware of the phone connected to the phone line to extract the voltage signal online, so inconvenient, time-consuming and laborious. To this end, I made a simple and practical telephone tester here, do not need it to access the telephone network, as long as the output terminal connected to the device can be. Especially in amateur conditions, there is no repair