- Check “Main Door Sec Code” option from programming. If you have any value set there it will override the general DTMF (9). If there is no value set for “Main Door Sec Code” you need to check the “Main Door DTMF” is set to 9 or not.
- Check that you hear a tone at the entry panel speaker when the resident presses 9. If no tone is heard, try another phone set for the occupant to use.
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