This is just one of many numbers used to try to sell some home security system. It's an automated message that starts with "Attention, this is not a sales call. You were referred by a friend..."
Then it launches into its spiel. This is not the only number that this message comes from either :(
I've been pestered by this phone number and others with the same solicitation and all prior attempts didn't work to stop the phone calls until late last week I called back. It will connect you to an automated system that will remove your phone number off the caller's list. Reluctantly, I pressed 1 to do so, but happily it did stop the calls after their 48 business hours processing time.