Power over Ethernet is a technology that allows to supply electricity over standard Ethernet cables. This is useful in many ways, as it allows to only have one cable to both provide the computer network and electricity to a device. It can be used for powering IP telephones, wireless LAN access points, network cameras, remote network switches, embedded computers, and other appliances. In many of these cases it is often inconvenient, expensive or infeasible to supply power separately. 