It is a home security system that a few months we were going to go with but something wasn't quite right. They just called again. I called back and it said the number want available... weird!
The reason you get the "number disconnected" message when you call back is so you can't ask them to put you on their do not call list. Sometimes these scumbags are calling from their home. I guess they don't like being bothered by telemarketers at their home!!