Denver was built originally as a dual system, A and B cable. But they never activated the B cable. So the techs had a spare in the air. Anyway, back before Comcast, was ATT, we were De/Re everything, much cleaner plant. Since Comcast took over you just overtrash it. Looks like shit, dead cable everywhere.
This is CABL.com posting #266468. Tiny Link: cabl.co/mbht2