One ring then hung up. I didn't recognize the number, nor do I know anyone in CT, so I did not bother to answer. Now that I see they are doing the one-ring-then-hangup to other people I am going to block that number.
My cell phone number is on the DO NOT CALL list and this number is constantly calling. They do not leave a message or anything. The one time I do answer it there is no one on the other end.