swann nvr8580

So I've recently installed a Swann NVR8580RN and 6x NHD887FN cameras. So far so good, but this is a replacement for a previous 8580 system that bricked itself after a couple of months, so I'm wary. Both the NVR and cameras say there are firmware updates available. My question is whether I...

I just bought a new swann security system that uses NVR-8580 and camera NHD-900DE. Does anyone know what the breakdown of the wires are in the cat 5 cable? What wires are power, video, audio? Do they use all 8 wires? I have an existing camera system installed that I ran cat 5 cable to, but used...