"If the portal is off why would they teleport to the surface? How would they teleport there without the other side of the teleporter also being present." He sighs, he doesn't understand. The teleporter looks different than what he's used to, but it also looks intact and functional.

Once a month. He's fairly patient, but he's not going to kneel there for a month and wait.

He gracefully rises back to his feet, walking around the teleporter again, "It does not appear broken, but if it is as you say then it is a one way portal. What pulls people through without a matching machine on the other side? Is there a control room that determines where they come from?"