PoE stands for Power over Ethernet. PoE technology is used for devices that tend to be mounted high up or away from power sockets, like wireless repeaters and security cameras. PoE technology removes the need to install new power sockets or run additional cables to reach the device that needs to be powered. Instead, the power is run through Ethernet. PoE technology is not suitable for all devices on the market. In fact, it can be quite dangerous if not used correctly. The technology requires careful installation for the best result. A PoE switch allows you to power devices through an Ethernet cable. IP cameras, video phones, TVs, and laptops can all be powered by a PoE switch. Some devices use lower voltage, while others require higher voltage.