Fault Detection Configuration for AOR-CSE Stations and PSTN Line: Carrying out this procedure on the controller board is required for proper open/short fault and PSTN/POTS telephone line fault detection on the system. In the lower-right of the controller, there is an orange-red configuration button. Once you have the AOR-CSE Stations and the PSTN/POTS telephone line (if required) terminated to the controller board, and the controller powered on, press and hold the orange-red button for three (3) seconds—the red LED above it will flash rapidly. When the LED turns solid, release the orange-red button. You will hear a beep to confirm that configuration has been completed.