|Well, as far as I know you don't need anything special from any government agency here in Canada. I have at least one wireless point-to-point shot that's over 1 km. I'd still check though.|
We are using Motorola equipment for our long p-t-p wireless shots. They're older now but the model we're using are the PTP600. My 1km+ link right now is running around 226 Mbps.
As for PoE at each location, you will probably want to use a PoE capable switch or PoE Injectors. If you have multiple PoE devices, they make rack mount PoE injectors for multiple devices.
You will need cabling to interconnect the antenna's and switches which will in turn feed the cameras. You can't do PoE wirelessly.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.