Extralink 24V PoE power supply Power supply designed to supply electricity through selected wires of twisted-pair cable to network devices such as AP, cameras, etc. This solution enables transmission of network data while supplying power in the same cable. The power supply is made to fit a power socket and has two RJ45 ports. One of them connects the device to be powered and the other one is used for patchcord connection to a switch or router.