@cannemi I have no experience with programming the security system but based on some Youtube videos and the documention for the NX-8E, here are the steps that I followed to make the changes.
From your keypad.
1 Press ' *8 '
2 "PLEASE ENTER YOUR CODE" - The default installer code is '9713'. If you don't have that, you'll probably need to contact the vendor who installed the system originally.
3 "ENTER THE DEVICE ADDRESS THEN #" - I think the default is '0' (make sure to hit # after that). '0' worked on mine and it sounds like that's pretty standard.
4 "ENTER LOCATION, THEN #" - Here's where you'll confirm/edit the com settings.
Enter '207#' "LOC# 207 SEG# 1" - It should be set to '1' as indicated on the settings I provided above.
If not, enter '1*'. If it is set to 1, then hit '*' to move on.
5 You'll again be entered location # and you'll move to the next zone 208#
Enter '208#' "LOC# 208 SEG#1" - It should be set to '2'.
If not, enter '2*'. If it is set to 2, then hit '*' to move on.
6 You'll again be entered location # and you'll move to the next zone 209#
Enter '209#' "LOC# 209 SEG#1" - It should show '1-------'.
If not, enter the number that shows up to clear it. As an example, if it read '-2-45-78', hit the 1,2,4,5,7,8 keys to toggle the values.
If it is set to '1-------', the hit '*' to move on.
7 For location #'s 210 and 211, follow the guide from step 6 above to toggle the required values from my previous post.
After you're done, hit the exit key a few times to exit the programming menu.
I've never done any programming on my keypad as it was programmed by my security company many years ago. Please be careful with the changes on the keypad ! Hopefully this helps.