The choice starts with the number of channels — how many cameras you will connect at all — and goes on to whether the recorder also has to power them. PoE, or a P in the model name, means exactly that: the cameras draw power over the same network cable. Dahua NVR models run from four channels to sixteen, and the XVR series also accepts older analogue cameras. A hard drive is usually not in the box and has to be chosen separately.
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The choice starts with the number of channels — how many cameras you will connect at all — and goes on to whether the recorder also has to power them. PoE, or a P in the model name, means exactly that: the cameras draw power over the same network cable. Dahua NVR models run from four channels to sixteen, and the XVR series also accepts older analogue cameras. A hard drive is usually not in the box and has to be chosen separately.