" Temporarily Off Air" message

One week ago I switched a year old HD cable box for a new one after recorded shows would halt and pause and not play. Since then, several channels (HD and standard) give me an error "Temporarily Off Air" screen, however, I was curious and found a few times that the channels are viewable on a non-HD box in another room. On occasion, the message will show up on the HD channel but on the same network on standard definition, the show is viewable.

I've also had several recorded shows with the "we're sorry, this show is currently unavailable" error message.

I am so sick of cox and these cable boxes. They are loud, even when turned off, and give me all these problems.

Is it really an outage or a box problem?