But phone connectors have built-in switches, so I would think there must be some configuration to route the powered lines through the switches so that the power is only connected until the plug is fully inserted, I think. For instance, if insertion of the tip control a double-pole double-throw switch, then one of those could route the ground pin and one could route the power pin, such that those power lines are only routed once full insertion has been made.
But phone connectors have built-in switches, so I would think there must be some configuration to route the powered lines through the switches so that the power is only connected until the plug is fully inserted, I think. For instance, if insertion of the tip control a double-pole double-throw switch, then one of those could route the ground pin and one could route the power pin, such that those power lines are only routed once full insertion has been made.