It was a message confirming a scheduled installation appointment. But I don't have cable, didn't order cable and Charter Communications is not in my area, that I know of.
Caller ID showed Omaha, Nebraska. Since we do not know anyone in that area, it was, to us, an unknown number, thus was not answered. If it is, indeed, Charter Cable, that would be strange also, because we live in an area that has no cable access of any kind, whatsoever.