Brother Fax Machine/Multi-Function Center MFC-9125CN - Manual (Page 159)

Troubleshooting and routine maintenance
143
C
Setting Dial Tone detection
C
Setting the Dial Tone to Detection will
shorten the Dial Tone detect pause.
a
(USA) Press Menu, 0, 4.
(Canada) Press Menu, 0, 5.
Initial Setup
4.Dial Tone
b
Press a or b to choose Detection or
No Detection.
Press OK.
c
Press Stop/Exit.
Telephone line interference/
VoIP
C
If you are having difficulty sending or
receiving a fax due to possible interference
on the telephone line, we recommend that
you adjust the Equalization for compatibility
to reduce the modem speed for fax
operations.
a
Press Menu, 2, 0, 1.
Miscellaneous
1.Compatibility
b
Press a or b to choose
Basic(for VoIP), Normal or High.
 Basic(for VoIP) cuts the
modem speed to 9600 bps and turns
the error correction mode (ECM) off.
For a standard telephone line: If you
regularly experience interference on
your standard telephone line try this
setting.
If you are using VoIP: VoIP service
providers offer fax support using
various standards. If you regularly
experience fax transmission errors
try this setting.
 Normal sets the modem speed at
14400 bps.
 High sets the modem speed at
33600 bps.
Press OK.
c
Press Stop/Exit.
Note
When you change the Compatibility to
Basic(for VoIP), the ECM feature is
only available for color fax sending.