OverviewCable and PoE Tester for RJ45 Networking and RJ11 Telephone Cables NF-468PT is designed to check the continuity of network cables (RJ45) and telephone cables (RJ11). Additionally, it also functions as a PoE tester, allowing you to detect power over Ethernet (PoE) voltage via twisted pair cable. The tester is able to differentiate between mid-span (4/5/7/8) and end-span (1/2/3/6) PoE and detect whether or not PoE equipment falls in line with IEEE 802.3af / at standards.