Answered and no response (empty line).  Suspect either duct cleaning scam or free trip phishing scam.

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.

glad i didn't answer this one :)

Answered "hello", heard tone like a fax line, on second "hello" the line went dead.