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== PoE IP Cameras ==Power over Ethernet (POE) is a technology that lets network cables carry electrical power. PoE is Power over Ethernet. If there is no source of power near the camera, only the Ethernet cable is required to carry both data and power to the camera. Unlike other PoE devices, these cameras do not seem to come with PoE power injectors. * PoE injector - places power on Ethernet cable for a single device. Connect between device and switch.* PoE switch - a network data switch that also supplies power on the network cable for the PoE device so that individual PoE injectors are not needed for each PoE device.The industry refers to different types of PoE injection devices including individual power over Ethernet mid-span injectors, desktop PoE network switches, and rack mount PoE switches.