Patent ID: 7116112

Claim:
An apparatus adapted for testing a cable having a plurality of wires, the apparatus comprising: a power supply terminal; an open circuit indicator with an anode connected to the power supply terminal; a short circuit indicator; a first interface and a second interface having a plurality of pins thereon, a first pin of the first interface connected to a cathode of the open circuit indicator, a second pin of the first interface connected to an anode of the short circuit indicator, a third pin grounded, the other pins of the first interface except the first pin, the second pin, the third pin, and a fourth pin connected, and the pins of the second interface connected, so that all wires of the cable are connected in series, even wires of the cable connected at one side of the short circuit indicator, and odd wires of the cable connected at the other side of the short circuit indicator; and a switch, in a short circuit test, the switch connecting the second pin and the fourth pin; in an open circuit test, the switch connecting the fourth pin and the cathode of the short circuit indicator and the open circuit indicator is shorted.