I answered the phone and it was a recording saying that "This is not a sales call. You have been referred to by a friend or neighbor" I think I heard them say something about a security system before I hung up the phone.
Repeatedly call my work phone. Recorded voice: "This is not a sales call. You have been referred by a family member or a friend. You are eligible to receive a free wireless home security system…." (one of 5 or so scripts used to phish for potential responders)
A secondary company is collecting the phone numbers of anyone responding to the sales pitch to sell to one of several companies selling home security systems. The FTC is prosecuting these businesses for this practice.