Years ago you used to be able to cheat the box into thinking that you had payed for box office using the phone line, that was quickly sorted. For multiroom boxes you used to have to be connected to the phone line, that was to check it was at the correct address, they have scrapped that now, saying they send a random signal at any time to check, but never had a problem with friends boxes in Spain. They cannot track where the box is via satellite signals though.