i just aquired a dxp plus customer and am needing to do some programming on it (did's, buttons, etc....).

i can connect via the serial port.
using the default password, i can log in but i am not able to really do anything but general maint stuff.

do i need the pcmmi or the vmmi software do do any real programming?

here is the version:
Comdial dxp plus
Release 180
Feature set 16a