Intermittent camera failure

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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??
 

alastairstevenson

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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?
 
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