电话在我国的普及率越来越高,许多地区的电话系统已经实现程控化,并具备长途直拨功能,这固然给用户带来使用上的方便,但却有人在用户电话外线上并接话机盗挂长途电话,将使电话用户蒙受经济上的损失。本文介绍的电话防盗挂装置可以有效地防止他人盗用电话线路,同时还具有同线分机电话相互保密的作用。 The popularity of telephones in our country is getting higher and higher. In many areas, the telephony system has been programmed and long-distance direct dialing enabled. This not only brings convenience to users, but also makes telephone calls to the outside of the user’s telephone Hanging long distance calls, telephone users will suffer economic losses. This article introduces the telephone anti-theft device can effectively prevent others from using the telephone lines, but also with the same extension telephone confidential role.