Kevin,
Will the ALP-44 have TMCC? If so, you can operate it with a DCS remote in TMCC mode, provided you have a TMCC Commend Base, a TIU, and the proper cable between the 2. Rather a round about way to do it, but it can be done. If no TMCC, then I agree completely with GGG: You are limited to conventional mode.
Chris
LVHR