With the TCT-141B, easily read correct pin configuration of 10baseT, 10base2, RJ45/RJ11 modular cables, 258A, TIA568A/568B, token ring, etc. You can test installed cables either on wall plate or patch panel from a distance and check for cable continuity, miswiring, open, short, grounding, and pin configurations. Cable adapters: RJ45 M-M, 2 RJ45MBNCF BNC M-M. On-board connectors: 2RJ45F (tester), 1 RJ45F (remote).