Here is my setup...
Outside Line -> Comcast-provided splitter/booster
From the splitter, internet Coax goes to Motorola SB6183. (Have Blast)
Other connections go to: Xfinity modem + 2 TVs
Xfinity modem is only used for phone service.
I added the Xfinity Beta channel to my Roku 2. I was able to successfully activate it online. However, after entering the code successfully, I get the error message: createdrmsession.403-102
Is there a way to get it to work when using your own modem?
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