Do you need to connect standard network equipment when there is no power supply? With this set, the device's data cable is enough, as it is also used for power. For an electrical outlet, you use one piece of the set and one at the remote network device. For power supply, a standard power source supplied with an access point, or another network element, can be used at shorter distances. For longer distances, it is necessary to select a power source to compensate for losses on the line.