Quicktip-Done-Untaped-Small Here’s a good step by step on making your own Power over Ethernet (POE) cable to supply power to your router/access Point/wireless gateway using only your RJ-45 connection. Power over Ethernet allows you to run only a single RJ-45 cable (Ethernet) to your access point, and run the power over the unused pairs of wires within the RJ-45 cable. Link.