The Intellinet Network Solutions 5-in-1 Cable Tester is a versatile MIS tool that tests five common LAN and computer cables up to 600 ft. long: Ethernet (RJ45), 10Base, RJ11, FireWire (1394) and USB. It checks for continuity, crossover and shorting. Testing is completed with the press of a button, and LEDs indicate connections and faults of wires and pins.