Thanks all of you.
John: I'm interested in all solutions available. Also Consumer / SOHO devices.
When it comes to Ubiquiti, what I would like is a setup like this:
Lets say I got a gate 500 meters from a building. At the gate I got power in a small house 15 meters from the gate, but no network. The camera is going to be placed in a 10 meter high pole. If it was possible to do this like in the picture above I would set up the PoE injector inside the small house, and use one cable up to the Nanostation LAN1.
And here comes the part I wish was possible, but its not with the Nanostation at least.
So if I could get LAN2 on the Nanostation to pass on 48V PoE to the camera I would have a sweet and easy installation.
All connections are made inside the waterproof equipment and I don't need use any waterproof enclosures to put converters or stuff like that.
I don't know how to make this happen with the Ubiquiti's PoE adapter/extender that converts 48vPoE to 24vPoE? What I usually do is to put the Ubiquiti PoE injector inside, and use one cable out to the Nanostation, and from the LAN port on the Ubiquiti PoE injector i run a patch cable to a normal 48V PoE injector and go from there with another cable out to the camera.