Brother MFC 7840W - Manual (Page 120)

106
Telephone line interference
B
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) or Normal or
High (MFC-7840W).
„ 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. (MFC-7840W only)
Press OK.
c
Press Stop/Exit.
Note
When you change the compatibility to
Basic(for VoIP), the ECM feature is
not available.