Interlogix Simon XT Installation Manual page 61

Program the panel in this order:
1. Set the panel clock.
2. Add (learn) sensors.
3. Change options as needed.
Note: If phone lock is on, phone numbers 1 and 2, downloader phone number,
account number, phone lock, downloader code, phone report modes 1 to 4,
access code length, and call waiting and dealer code will not reset to their
defaults.
Simon XT Installation Manual 55