Sometimes you have a CAT5 cable in place but no power connector nearby. Perhaps you want to move your wireless access point into the loft for example. With these inexpensive passive Power over Ethernet (PoE) connectors it’s a easy job, check out the video.
“Passive PoE uses free wires in the Ethernet cable and sends the equipment’s power along them to the far end. Over a short distance, it’s usually possible to use the power adapter supplied as standard with the access point or with other network elements which we wish to connect along the Ethernet cable. If the loss of the voltage on the wiring along longer lengths of Ethernet cable is too high, it’s possible to use another more powerful power adapter, to eliminate this loss of voltage.”