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I heard from a friend that a Cox employee mentioned that their new Contour 2 boxes don't work with either IR universal remotes or other control systems. Example, I have all my equipment in a closet in another part of the house and based on this info I'd only be able to use a Cox remote. I'd have to laugh real hard if Cox came out with a new box that works/doesn't work that way.
I called Cox and their tech support doesn't even now IR from RF. Geez.
For one of my boxes I have an IR emitter stuck to the front. The other 2 have IR blasters aimed at the front IR sensor, so I didn't have any reason to try the rear IR input and can't comment on how it works.