Patent ID: 9712372
Date: 2017-07-18
CPC Classifications: G01R,H04B,H04L

Claim:
1. A cable signal detector, configured to detect a presence or an absence of information communication in a communication cable including a plurality of signal line pairs for differential signaling, the cable signal detector comprising: a plurality of detecting portions each of which is configured to partially branch and draw a transmission signal from a different signal line pair, rectify the branched and drawn signal into a direct current, and output the direct current; and a displaying portion configured to display the presence or the absence of information communication, based on outputs of the plurality of detecting portions, wherein the outputs of the plurality of detecting portions are connected in series, and the displaying portion is configured to display the presence or the absence of information communication, based on an overall output voltage of the plurality of detecting portions connected in series, wherein the displaying portion is connected in series with a plurality of inductive elements for alternating current interruption and a plurality of capacitive elements, thereby providing a series circuit, and wherein the plurality of detecting portions are connected with the series circuit.