I know what a 622 is, but what is a 721 and 508?UTFAN said:Hi all,
We have a 622, 721 and a 508.
We DirecTV people don't understand those model numbers... A DirecTV HR-20 is the equivalent to a 622 but you may want to be cautious. The 622 is more "mature" than the HR-20. It's gotten better, but it's still a bit buggy.