I just called back and asked to be put on the no-call list. The gentleman was polite, who knows if he'll actually follow through. But reading through the other posts, I thought I would just say that someone did answer when I called and that he was polite.
This is 5-star alarm in Tempe, AZ. They buy lead lists. They use an autodialer which will often give dead air when no rep is available, and then it hangs-up on you. You can sue them under TCPA for using the autodialer w/o giving a recording of who the caller is. And also if you are on the national DNC list they shouldn't be calling in the first place. Sue them.