Power over Ethernet (PoE) is the technology that allows network cables to carry electrical power. For example, a digital security camera normally requires two connections to be made when it is installed: a network connection, to enable the camera to communicate with video recording and display equipment, and a power connection, to deliver the electricity needed to operate the camera. Using PoE, both can be delivered through the network cable, simplifying installation and reducing the need for electrical wiring or outlets.