The utility model relates to an automatic detection device for communication lines. The utility model comprises a crystal head, and the technical proposal of the utility model is that the connecting end of the transmission line and the receiving line is respectively connected with the two input ends of the light emitting tube. When in use, the utility model is inserted into the corresponding socket, by viewing the corresponding light emitting tube is light that is able to determine the line is smooth, if the line is not bright, you need to notify the telecommunications sector detection circuit, if the light, only need to check your phone or computer problems can be. This simple detection method, the problem can be a simple judgment, thereby reducing the trouble.
【技术实现步骤摘要】
【技术保护点】
一种通讯线路自动检测装置，包括水晶头，其特征是：传输线与接收线的接线端与发光管的两个输入端分别连接。
【技术特征摘要】
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