Help me with an IP camera & Network switch fiasco please

Hi, as all these tricky jobs go I got drafted in to add to and sort out some issues on a previous install.

NVR - Router - connected together in a basement

Router - 80m cat6 - Network switch 1 (2 uplinks and 4 POE )

Network switch 1- 20m cat5 to 1 4mp cctv camera

Network switch 1 - 200m cat 6 to network switch 2

Network switch 2 ( has option for cctv and lan mode) - 10m cat6 to ANPR camera Network switch 2 - 10m cat6 to 2mp camera Network switch 2 - 10m cat 5 to 4 mp camera

The added bonus is an an additional alarm output cable from the NVR to a motorised barrier using cat6 but at nearly 300m

It was working although with lags and delay but now the alarm triggers in the cameras are not opening the gate, if I manually trigger the alarm on the NVR you can hear the relay make noise and work but nothing happens. It was working well until network switch 1 was introduced to add the 4 mp camera.

Any and all help is much appreciated

Thanks