this # keeps calling and hanging up  when you answer . if you call back then it sounds like a fax

If its, an anonymus caller to a fríens fax. He want it to stop. Is this possible?

This phone # keeps calling and leaving me voice mails,  and I don't know them. I won't to stop it. I know it is coming from Canada

This number phones and repeatedly tries to send a fax.  Not sure who it is.

Its bell Canada trying to send you a fax.They do this sometimes when they can't get a hold of you and they hear a fax machine.  So they try to send a fax with a message on it.