Thanks for the advice, this was an existing setup but I managed to lose the images during the firmware upgrade.
The cameras plugged into the switch wet 192.168.254 range so I assumed the NVR would need to sit on that range.
When I return I’ll see if I can get it back how it was
Hi
I went to a business park today, 4 x IP cameras connected to a PoE switch, 1 x cat 5 link from switch to NVR LAN port and 1 x cat 5 link from switch to 4G router.
Defaulted admin password no problems, upgraded the firmware of NVR and from then on it wouldn’t communicate to the cameras...