They called and didn’t leave a message. I called back and got flak from the scheduler until I was transferred to a supervisor. The supervisor said yep you weren’t contacted with enough time the trip is off my schedule. So no harm no foul. I then thought about what would have happened if I didn’t see the missed call and there wasn’t a message. Did that count as contact even though it was within the 12 hours? The schedule reference handbook and PWA don’t state what counts as contact that I can find. This is why I ask the question.