The first few times nothing was said.  Now after a few seconds an automated voice says, "To accept this call, press 1.  To leave a message, press 2."  The name that appears on caller i.d. is [email protected].  I choose to do neither and hang up.  I looked up the number and it identifies as being from Dayton, TX and seems to be a cell phone.  I strongly advise that no one accept calls from this number!  There is a prison in Dayton and this could be a prisoner phone call scam of some sort.