Why Are My Cameras Dropping Off The Network?

Hi Guys,

I am having an issue with two cameras (Hikvision DS-2CD4324F-IZH) in an installation. The cameras are configured as such:

[GigE Switch]
|
[10/100 Outdoor Switch]--Camera #3
| |------Camera #2
|-----------Camera #1

There are three outdoor cameras connected to an outdoor 10/100 switch, which is connected to a GigE switch at the back-end. Each camera is powered by 24VAC. The one camera that stays connected to the network (Camera #3) is connected to one 24VAC transformer (40VA). The two cameras that keep dropping off the network are both connected to a separate 24VAC transformer (40VA) - this transformer feeds both cameras power via one 2C#18 line.

The network cables connecting the cameras that keep dropping off the network are about 10 feet long and have been verified using a cable verifier. Camera #3 has yet to have an issue.

I have tried to reset the cameras to factory default, change the network settings around and follow other suggestions. The cameras themselves appear to not be dropping packets, but I will have to make a special trip to site soon to check this out.

Can you guys think of anything else that I could try? Should I replace the cameras and send the two non-working cameras back or is there something else I should attempt?

Any input is much appreciated - thanks!

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