Should I purchase the DSC iOtega Wireless DIY Home Security System
There are two codes all DIY homeowners should know related to their security system, the Installer Code, and Master Code.  The Installer Code (also called Program Code or Dealer Code depending on brand) is a special code used to access system configuration settings so a user can add sensors/zones, change delay times, modify central station telephone numbers and account numbers.
The Master code on the other hand accesses a different menu where the homeowner can add, delete, edit user codes, WIFI settings, view the system event log.  The Master Code can also arm and disarm the system.  The Installer Code can also arm/disarm the system with some important limitations.  If the Master Code (or any user code other than Installer Code) is used to arm the system then the Installer Code can NOT disarm the system.  This is a security feature built in to most systems.
User Codes are configured using the Master Code.  These codes can arm and disarm the system and bypass zones.  Some families have a specific User Code per family member while others all just share a single User Code (usually the Master Code).  Definitely user preference!
Each brand of security system has a default Installer Code and Master Code when setting up fresh.  When the Installer Code is not known for an existing installation we recommend trying the default Installer Code first since many dealers do not change this code (despite knowing they should).  Some brands such as Honeywell have a backdoor procedure for changing the Installer Code when the existing Installer Code is not known.  Other systems must be Factory Reset which erases all existing zone configuration and returns the Installer and Master Codes back to default.  This is generally a last resort since the entire system must be reprogrammed from scratch.  Some systems however can not be reset if the last dealer “locked” the panel meaning no local access, only remote access by the dealer.  We never lock a system but there are many dealers who do since they are afraid of alarm monitoring “takeover”.  Our stance is “provide good service at a reasonable price and we’ll retain customers!”
Honeywell-logo

Honeywell Panels

Installer Code:  4112

Master Code:  1234

Ademco

Ademco Panels

Installer Code:  4110

Master Code:  1234

2GIG

2GIG Panels

Installer Code:  1561

Master Code:  1111

Qolsys

Qolsys Panels

Installer Code:  1111

Master Code:  1234

GE/Interlogix Panels

Installer Code:  4321

Master Code:  1234

HAI Panels

Installer Code:  1111

Master Code:  1234

DSC

DSC Panels

Installer Code:  5555

Master Code:  1234

Napco Panels

Installer Code:  4567

Master Code:  1234