Brother MFC-J470DW Basic User's Manual page 36

Chapter 5
NOTE
If the option to change the receive mode is unavailable, make sure the BT Call Sign feature is
set to Off. (See Advanced User's Guide: To enable the machine to work with BT Call Sign
(with your external telephone only).)
e
Press a or b to choose Fax Only, Fax/Tel, External TAD or Manual.
Press OK.
f
Press Stop/Exit.
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