On October 7, 2021 at 17:37, Rob Grabon said...
If they were each powered with an injector, and the three put on their own network switch, and static IP set, they really wouldn't care if the switch between them and the NVR got unplugged.
The cameras would stay powered, and the NVR would show as no signal from those cameras. When the switch turns on, the cameras are already running, and the NVR should reconnect and record as usual.
Why deal with an NVR being disconnected from a network and assuming it will reconnect properly, every time? Recording schedules are allowed to prevent this kind of problem.