Intermittent camera failure

Jul 25, 2015
18
4
My 7608N-E2 running on 3.3.3 is experiencing some intermittent "video failure" on random channels. After a few seconds, it all goes back to normal.

Suggestions??
 
Is it saying 'video failure' in the NVR logs?
How frequent is 'intermittent'?
What's the network arrangement, eg gigabit backbone with NVR on it, cameras (how many) on 10/100 switch or router, what speed connection is the switch/router uplink?
Any heavy network users that might be capable of causing an overload or congestion?
Does a 'ping - t' against the NVR and cameras show any breaks or rising response times?