I have a TDM-400 with 4 FXO cards in it. On older elastix versions, I could set inbound routing per channel on this card so I could direct calls to specific destinations based on the channel of the Digium card they originated on. I can't seem to get this functionallity working on the newest version 1.5x. (was running 1.1 or 1.2 previous). Is this still possible, and what do I have to do to get it working?