The EVL-4 will need atleast one keypad enabled in the Vista 20P. Since I'm using both partitions of the Vista 20P, my particular setup will require two keypads to be enabled. Keypads three and four are the next available keypads in my system.

V20P Address 190 = Keypad 2 (keypad address 17)
V20P Address 191 = Keypad 3 (keypad address 18)
V20P Address 192 = Keypad 4 (keypad address 19)


1) Enter *191 (to go to address 191)
2) Enter 1 (to enable the keypad 3 on partition one)
3) Enter 0 (for no sound suppression)
4) Enter *192 (to go to address 192)
5) Enter 2 (to enable the keypad 4 on partition two)
6) Enter 0 (for no sound suppression)