GE / ITI / UC SX V Codes

Master Code only changed by downloading, customer can only change 2nd User Code
Certain versions have User Codes 03 to 33, these can only be changed by downloading
Add 2nd Code Master Code + STATUS + New 4-digit Code
Erase 2nd Code Master Code + STATUS + Master Code again
Hostage Code First 2-digits of User Code + 99
To access these with ITI Receiver enter XACCESS instead of MACCESS