This setup sounds interesting - we have a difficult site and buildings to watch & some trees interrupt a direct line of sight to our main office (although currently can just get wireless internet through the trees). I had considered using three Vivotek wireless IP PTZ outdoor cameras and link the two main buildings on site using two separate broadband connections (each building has phone line and broadband).
But reading this post, I wondered:
Would the microwave / rf system suggested be a better bet than wireless IP / internet?
How does the rf modem control the PTZ cameras?
Would each camera need its own transmitter & receiver back to the main office (i.e. three receivers at the main office)?
What equipment is required between the receiver(s) and the PC card?