If 2 mins. Is true methinks a bit more to this. Eg f/o trying to drop the capt in it for some hidden agenda. If capt actualy wanted to stop f/o he can override those other means. I suspect he was busy & possibly did not want to press crew call & change tx/rx on the audio selector panel. Now if 20 mins that is different ' I'd expect ANZ to have taken a dimmer view.