I guess I should have said required.....My father in law caled to have DTV installed this coming Tuesday. He is having the R15 installed in a lake house with no phone line. They told him this was fine, that DTV was losing too many customers to this issue. Is this the case? Can I FINALLY lose my $15/mo phone bill? I have 2R10s, 1 HR20, and two other misc receivers. Thanks all!