Not sure exactly what you mean. I'm using the Comcast remote that was supplied at the time of the installation. I have three units and all three remotes are Comcast issued. None of them will accept or function as a remote for my television.
The link in your post doesn't work for me. I get an error page. Not sure if it's an issue on my end or something with the link but, thank you for your post. I'm still waiting for Xfinity to get all the bugs worked out with the X-1 platforme. This is just one of the many issues that system has.