Cox contour 2 and Comcast Xfinity boxes respond to urc code set 203. It's under Comcast-->Xfinity [IP Only]. I know the IP part makes no sense, but it's the most reliable codeset that I have found. It works IR from the URC remote L.O.S. to the box, and also via RF thru MRF boxes.
The people at Comcast, Cox etc. have no idea what they are talking about. Their boxes accept IR no problem, no special settings needed. You can even leave the original box/remote combo as is (for voice control)
The Logitech Harmony people... No comment.
I'm Not an engineer, but I play one on TV. My handle is Tweety but I have nothing to do with the organization of similar name. I just had a really big head as a child so folks called me tweety bird.
