So the issue I am having, at-least once a week a camera is dropping off the NVR. I go over to the site, unplug the camera, plug it back in, and the camera comes up again. I have a mix of 3MP (HDW4300C) and 4MP (HDW4431C-A) which is a total of 16 cameras connected. I did upgrade the firmware on the HDW4300C’s, but it happen again. Anybody have any insight on this?