Brother MFC-8510DN Basic User's Manual page 47

Changing the Remote Codes
The preset Fax Receive Code is l51. The
preset Telephone Answer Code is #51. If you
are always disconnected when accessing
your External TAD, try changing the
three-digit remote codes, for example ###
and 999.
a
Make sure you are in FAX mode
b
Press Menu, 2, 1, 4.
21.Setup Receive
4.Remote Codes
a On
b Off
Select ab or OK
c
Press a or b to choose On (or Off).
Press OK.
d
If you chose On in step c, enter the new
Fax Receive Code.
Press OK.
e
Enter the new Telephone Answer Code.
Press OK.
f
Press Stop/Exit.
Telephone services and external devices
7
.
7
39