Is it possible to get through Security in terminal 3 if your boarding flight is for gates at terminal 1? I need to meet some friends before my flight. We would go to lounge with PP. Since I am already in AUS and will be returning to BEG (my flight on JU will be at terminal 1. My friend is arriving from TGD (non Schengen) and continues to PRG (Schengen).

Is it possible to walk between terminals. My friends will have over 3 hours layover, so what would be the best strategy to meet them in one of the lounges.

Thanks,