PoE IP cameras
prices on 437 models— the PoE technology used in cameras connected via LAN (see the relevant paragraph) makes it possible to use the same Ethernet cable to power the camera, which it is connected to the local network. This eliminates the hassle of connecting power from a wall outlet or other external source and eliminates unnecessary wires — the main thing is that the device on the other end of the network cable also supports PoE.
A similar feature found in traditional analogue cable cameras is called PoC.
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