There's usually some space between train coaches (I think it's called a gangway?) or at the end of a coach (a vestibule) that is separated from the seats area by doors on both sides. You can take your call there.
Gotcha. On the trains I'm used to (Amtrak, NYC subway) spaces between cars are either nonexistent, or extremely dangerous.
Gotcha. On the trains I'm used to (Amtrak, NYC subway) spaces between cars are either nonexistent, or extremely dangerous.