I installed a couple of these in parking lots where business were destroyed after the hurricane hit south Louisiana two years ago. Remote Surveillance Camera Systems | LiveView Technologies
that system connected over cellular.
you could design your own “System”
Enclosure
batteries
pole...
So, it depends on your equipment. For instance with VLANS, some equipment BLOCKS a VLAN from other things on your network, and other allows VLANS and equipment to talk to each other.
if you can list the model of network equipment I’ll see if I can help you.