Free Alarm system scam. Also a caller id dipping scam. They are more concerned with collecting their 1/4 cent from your local telco for the caller id data.
REPORT TO THE FTC AND YOUR LOCAL DNC AUTHORITY. BITCHING ABOUT IT HERE DOES NOTHING OTHER THAN MAKING YOU FEEL BETTER. Yes I was shouting...
Called my mobile phone (ILLEGAL!) that is on the National Do Not Call List (DOUBLE ILLEGAL), and the Missouri Do Not Call List (TRIPLE ILLEGAL). String these dudes up spread eagled and let us all kick them in the balls until they die.