· This Cable Tester Is Designed To Troubleshoot Rj45 Lan Cables, Both Utp And Stp· It Not Only Tells You If The Cable Passes Or Fails The Test, It Indicates Which Pins Fail And Whether They Are Open, Shorted, Or Crossed· The Tester Has Two Basic Testing Modes: Auto And Step· In Auto Mode It Makes A Single Pass Over The Cable And Gives A Result· It shows whether the cable passed or failed and, if it failed, the type of failure and the affected pins/wires· In step mode the tester steps through each wire independently with each press of the Test button