The MOST digital station key codes you can activate with digital key codes are 12. Those 12 reside on the main unit.
If you want more than 12, then you add an expansion unit.
You must have 1 keycode for the expansion unit.
That keycode will enable whatever module you have in the expansion unit.
If you put a 16 DSM in there you will have 16 digital ports.
If you put a 32+ DSM in there you will have 32 digital ports.

If you have a second expansion unit, you need another expansion key code and it will enable what ever module you put in there.

And the expansion ports may not show enabled until you connect a digital phone to each set of 16 ports.


If CON is the opposite of PRO
Then what is the opposite of Progress?