Brother 1840C - Manual (Page 125)

10 - 12 TROUBLESHOOTING AND ROUTINE MAINTENANCE
Compatibility
If you are having difficulty sending or receiving a fax due to possible
interference on the phone line, we recommend that you adjust the
Equalization for compatibility. The machine adjusts the modem
speed for fax operations.
1
Press Menu/Set , 2 , 0 , 2 .
2
Press ▲ or ▼ to select Basic , (or
Normal ).
Press Menu/Set .
3
Press Stop/Exit .
For MFC-3240C, you can select High to return to 33600 bps.
■
Basic reduces the modem speed to 9600 bps. Unless there
is a lot of interference on your phone line, you may prefer to
use it only when needed.
■
Normal sets the modem speed at 14400 bps.
2.Compatibility