This is a fraud campaign currently active in Canada using a series of Iristel VOIP numbers.  The objective is to obtain your credit card number and drain your account.

If you attempt to "opt out" your number will be confirmed as live and added to a suckers list for repeated future calls.

I didn't answer but there was a partial automated voice message saying I'd won $2500 cruise bucks to the Bahamas! Woo hoo! I've never won anything fake before in my life!

Call today from this number.  No answer and no mechanical sounds.

Called Feb 5, 2013.  Some bull crap about being selected from an interenet survey (I never do surveys, so I knew it was bull) and to press 1.  I just yelled into the phone "screw you".  Don't know if they heard it, but it made me feel better. :)