I installed one for Ford. Its a system called Fordstar, and I think the last one I did was pointing towards G4 at 101 West.
Basically its a 2-way satellite internet system, does all the credit card processing and connects the dealer to corporate for inventory management.
Some of the systems even have video for demo televisions on display in the showroom with promotions and information for the customers.
Same type of system you see on gas stations.