The number said that they were from an FBI security system and if you allowed them to put a sign in your yard, they would install a home system free of charge. It also asked to press 1 for more info or press 9 to be added to do not call list.
I got this call at 12:22 PM Pacific Time today. I didn't answer, and it left no message. Let's report them to the National Do Not Call Registry! https://complaints.donotcall.gov/complaint/complaintcheck.aspx