A couple of days ago I got my latest Comcast bill and noticed it went up. So I called the 800 number. Got a fast busy. Tried the next morning and same thing.
Tweeted Comcast Care and they said everything was fine. It wasn't.
Talked to CenturyLink (yes, I still have a landline) and turns out Comcast switched long distance carriers and didn't test to see if analog connections worked . The CenturyLink CO did not recognize them. It is now fixed.
Another fine example of how everything impacts customer experience.