GE / ITI / UC Commander 2000 Codes

Master Code User 1
Secondary Codes User 2 to 6 (Users 3 to 6 can only be added by downloading)
Duress Code First 2-digits of User Code + 99 (User Codes cannot end in 99)

Change Master Old Master Code + STATUS + 8 + New 4-digit Master Code
Change User 2 Master Code + STATUS + 7 + New 4-digit User Code
Erase User 2 Master code + STATUS + 7 + Master Code again
If successful keypad should speak the new Code