How to raise a network on two wires?

Question

Computer networks

Gentlemen, in general, the essence is this .. there are 2 surveillance cameras, they have LAN ports
. The task is to stick them into the grid. but the trouble is that from the nearest cable to them - only coaxial. Pulling or drilling the frame is not allowed. That is, there are a pair of contacts (2 pcs) and a pair of contacts at the output near the cameras.
I thought about putting a poe switch somehow, but how to start a network over two wires ..
There were thoughts of using something like Powerline adapters .. but this is dangerous and not worth it.
That is, output 220v to the coax and thus get a "LAN cable" through this coax.

Answer 1

only in this way ssdcam.ru/index.php/aksesuari/item/ip-coax-s
Only once you can't drill anything there - so the coax is thicker than the winder. Carefully stick the coax out of the frame, shove the vitukha.
In general - there are no such circumstances that nothing can be drilled, and there is no way to throw a cable cunningly - it is always possible, you just need to think and explain it to the customer.
Well, I don’t know - you can still make a wafai bridge out of two routers.

Answer 2

Bridge on DSL modems

Answer 3

Baiterg had coax-powered solutions. See if they still make them.