Local Area Network Ethernet/LAN We install and certify speed ratings in local area networks. A basic installation utilizes a conductivity meter which tests the "pin out" of the RJ45 jacks. A comprehensive test utilizes special test equipment which will pass one gigabit of data at 350MHz (IEEE 202.3AB) [1000base-T]. We test for attenuation, cable length, EMI interference and for TIA568/570 interconnect standards. FAQs How does the Cat5 cable work? There is a twist in the cable assemblies for each pair of wires (4), typically 3 for every inch. There is a different twist rate for each pair. This twist interchanges the north-south magnetism in the cable assembly, which minimizes magnetic induction of data (cross-talk). What is the pin out for Cat5 cable? There are two 568A and 568B. "A" is typically a telecommunications standard and "B" is used for 1 gigabit switch.