Security system scam. Seemed to be a bot that responds to simple yes-no questions. Any compound answers will get you a swift, "Okay then, have a nice day." And a hang-up.

2 calls in 20 minutes and no msg left

Received a call on a direct dial work number.  They call 3 or 4 times a week.   If you push the 2 they have a live wire of course so don't do that.  You can call the number back to opt out but that will not work from a PBX exchange with 500 phones, forget it.  They only see PBX number not the real number. Good Luck.  

I have had 64 calls from this number since last week, They are averaging about 6 calls a day or more and im fed up,No one on the line, if i call back it asks me to leave a message so i basically cuss them out because well what can ya do? Im on a do not call list and they are calling all hours of the night, i even have 7 calls from between 1 amd 5 am

[***] keep calling sometimes 2x a day, started after I listed a car for sale on tampa craigslist last week, I scrambled the phone number from auto miners so someone had to mine it manually.