Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
it sounds like your receive mode may be set incorrectly or was reset somehow.
Go into the settings menu, under fax settings, then receive mode (RX mode)
and be sure it is on the DRPD mode
from there under drpd settings, you'll set the pattern (2 short rings, etc).
Let me know if that helps,
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