Comprehensive type instrument for locating faults in communication cable

The utility model provides a comprehensive type instrument for locating faults in communication cables, namely an A/D converter, a resistor test circuit, a control switch, and a bridge type balance detection circuit are additionally arranged on the utility model on the basis of an original pulse-typed test circuit, wherein, the output end of the bridge type balance detection circuit is connected with an SCM through the A/D converter. The SCM controls the resistor test circuit through the control switch and receives, processes, and displays test signals outputted by the resistor test circuit through the A/D converter. The utility model integrates pulse reflection methods and bridge methods into a whole. The utility model not only keeps the function of testing positions of wire breaking obstacle points and cross obstacle points but also adds to the function of testing positions of telluric effluvium obstacle points and poor insulation obstacle points.