Question:  Is it possible to remove a beltpack from participating in the ISO channel on a single base station?
I have four beltpacks, two beltpacks are using the ISO feature to converse between themselves. The third beltpack is part of a different area and does not need to hear or talk on the ISO. Is it possible to remove that third beltpack from ISO buttons C and or D?
Answer:  The individual beltpacks button functions are programmed from the base station front panel display.   To disable the ISO functionality on a particular beltpack go to the programming menus and access the following menu options: 
Config:
Beltpac > Beltpac Setup >  Sec Buttons
BPSec > BP3 > Button C or Button D > ISO OFF or ISO Momentary
The base station menu display for the beltpack is shown below:









Another alternative to the front panel menu programming is to use the PRO850 software GUI programming tool to make the button adjustments as needed.  See screen shot below for the programming specifics.