DSC stores alarm codes in different slots starting from 01 to 90
In order to change the code you must know the slot that it is located under. The master code will always be located under slot 40.
1. Press *5 followed by the master code
2. Enter the slot number. For the master you would enter slot 40
3. Enter the new master code
4. Confirm the new master code
Press # and your done
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