Your fax machine *may* have specific instructions (if not too old) for this very common type of installation (many do). Consult your fax manual to learn how to set this up. Your AT&T TL86109 phone has no options for adding a fax machine.
If your fax machine lacks the built-in ability to forward non-fax calls to your telephone or TAD, you will need to either purchase a fax machine that can do this, purchase and install a "
fax switch" or, manage your fax calls manually - by only enabling the fax machine to answer calls when a fax is expected.
If yout still have problems, please post the name / model of your FAX machine. I hope this helps & good luck!
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