KF.Y-1 This series of network tester is specialized in quickly testing the line sequence of continuity and location for 10-Base-T(CUP-STP)-AT&T258A,TIA568A/B,Token Rine and USOC4/6/8module cable through the automatic scanning cable .By using the attached longrange end device (this tester)before or after the cable is installed ,it can easily test the cable.It is handy to be used and quickly be tested.