Not really sure of the best place to post this since there dosen't seem to be a Satellite hardware forum.
I have a DirecTv H20-100 receiver. Some time ago I was able to find an engineering document that detailed the RS-232 protocol - over USB - for it, and thus was able to write a driver to integrate it into my control system. However, this box does not have a broadband interface so requires a POTS (analog) phone connection. I'm also running a VoIP phone system and analog-TA's don't really work with digital modems so this box, more often than not lately, won't let you use the remote to order because it hasn't been able to talk to DirecTv over the modem through the TA.
So, this brings me to upgrading the receiver so that it can talk to DirecTv, and also so it supports 1080p, but I'm concerned that I'm going to loose the integration that I've developed. So my question is, do the new receivers still support the same protocol available in the H20-100, or is there a new [documented] control protocol available in them?
Thanks to anyone that can give some insight on this!