Thanks for all the info.

I do not have a clear line of sight (but will look further into the nano)

I am in the process or revamping my analog system into a digital IP network system

The single aerial cat5 cable is designed to be used as a temporary installation for testing my first new IP auto tracking 2 MP PTZ camera.

There is already a hang cable available with other analog RG6 at the lamp post

There is local power at the PTZ lamp post area - camera power/transformer will be sourced from here.

I intend to mount at least a total of 3 cameras at this single location/lamp post area. 

Burial cables are planned in the future - total distance 300 feet.

Any suggestions on how to better implement this improvement ?

I think that I have it figured out but need to do some more work on it.

If the lamp post already have power, then what else do I need ?

1. Used the it to power the camera transformer and a hub in #2.

2. Install a powerline router/hub - like Linksys 4 port

3. Plug in the camera(s) cat5 into the hub

4. Install a powerline receiver at my router home end

5. Done - no cat5 or RG6/RG59 needed

I will have to do some more research on:

4 cameras at 2mp each and the network hub bandwidth

Make sure that the 110 volts legs on both sides are the same or install a signal bridge/crossover

Will need a plastic control/junction utility box instead of steel due to the high heat.

Would also like a small fan in the box - prefer thermal control

Private Light pole approx. 25 feet tall with private 110 volts on my breaker.

PTZ are generally not POE due to heater and blower. They have a high power requirement and will not work at 300 feet. Mine is 24v AC

Yes, something like the power line receiver in your link.

But I have in mind D-Link 4 port at 500 Mbps with a range of 985 feet on the same breaker - no problem with same breaker

Will this work ?

Thanks very much for all the excellent ideas.