We have 2 TruVision TVN20's and ~20 Interlogix IP Dome cameras - UVD-IP-EVRDNR-VA2's (not the -P versions). Plus 2 bullet cameras - GES TVC-M1245E-2M-N
The cameras are set to record continuously 6am-9pm M-F and motion activation any other time. The dome cameras have 1-3 that seem to loose connection to their assigned NVR. Usually they'll come back later or another day and different cameras will be off line. Usually if you go directly to the camera they are still active but the NVR doesn't see them and they don't record. I've started noticing that the Cameras that aren't recording show up as being PAL cameras in the properties. When they start working again they show up as NTSC cameras. I haven't been tracking them long enough to find a consistent pattern as to which camera will be off on any give day. Yesterday 1 camera was out on each...