Hi I have sky tv and dont have it connected to a phone line.
In your sky contract you only need it connected to a line for the first 12 months.
The reason is, when you book any type of movie on box office or one of those pay per night porn channels the information is actually stored on your viewing card first, then at a later time your viewing box actually rings out in the middle of the night sending the information to sky down your phone line, what you have watched. There is also your viewing habbits and what channels you watch the most - like a marketing thing