Got a similar voicemail from "David" who said "I need you to call me back right away, as it is relatively important" without leaving a company name or what it was about.  He was certainly not someone I knew and was talking so fast that I smelled a rat.  Thanks to the previous posters.

Same thing  as Shannon here. Dec 9 2013, my guys in area will install pronto, told no thanks and he gives spiel about 90% of business break ins are not recorded and unsolved blah blah watch your employees etc, etc. Sounds fishy especially around the holoidays> I have a camera that caught car vandals that I will be placing in the business to see whats up.

I just got a phone call from a restricted number, they left a message saying "Hey Shannon this is Hank over at BIT please give me a call back at 336-617-5235." I did return the call and left a message on the machine saying he did not have to return my call as this was a church and I was not interested in purchasing anything. He immediately returned my call and said "Hey look I have some of my guys in the area and want to set up a time for them to come over and demo our wireless security system." I again told him that I was a church and not interested and he proceeded to say "I thought you said this was a church, I have never talked with someone so rude." and he hung up on me.   Hence the post here, I could hear a bunch of telemarketers in the background, no doubt it is a scam of some kind.

This number calls our company every morning and he will try and call two times back to back like he thinks he's going to get a different answer each time when he calls in to ask for the owner.