Hold one hand a very small distance in front of chest with palm sideways and fingers and thumb both bent forward in a sideways 'U' shape. Your other hand moves up and backwards from waist height with fingers, but not thumb, bent backwards and back of hand facing forward; so that fingertips pass through the 'U' of your other hand.
Context for Auslan
There is a different sign for outbound faxes and the fax machine.