Brother MFC4550 PLUS - Manual (Page 175)

No Dial Tone on the Handset:
Press Hook. If you do not hear a dial tone, check telephone line cord connections at
the MFC and the wall jack. Check that the handset is connected to the MFC’s handset
jack. Test the wall jack with another single line telephone. If there is no dial tone on
the wall outlet, call your Telephone Company.
Double Ring in F/T Mode;
The MFC knows the incoming call is not a fax, so it is signaling you to answer the
telephone call. Pick up the MFC’s handset or answer from an extension phone and
press your MFC’s Remote Deactivation Code (the default setting is #51).
Problem using tbe HP Pavilion PC and tbe “HP DEMO” Screen Saver
If you select the “HP Demo” screen saver on your HP Pavilion PC after you have
installed the Multi-Function Link Pro software, the System.ini file is overwritten and
you cannot use the Brother MFC to print, scan or for Remote Setup.
If you have used the HP Demo screen saver already, you must edit the System.ini file
as follows;
[boot]
;comm.drv=commll5.drv
comm.drv=brmfcomm.drv
[386Enh]
DEVICE=C: \WINDOWS\ SYSTEM\Bi-Di.386
If you do not want to edit the System.ini file, please change the screen saver to another
one and Re-install Multi-Function Link Pro again.
Bi-Directional Parallel Ports (Nibble and Byte modes):
The MFC 4550
plus supports both nibble (AT) and byte (bi-directional) mode parallel
ports. If your PC supports byte mode, scanning and fax reception will be at a faster
Speed. To verify or change the parallel port mode, please check your system BIOS in
the CMOS Setup or
contact your computer manufacturer for assistance.
NOTE: Some older PC models support only nibble mode. Generally, newer models
support both nibble and byte modes.
MFC Connect Failure or Bi-Directional Communication Error
Recently, some printers have included a function to show the printer status on the
PC display. Such printers use the bi-directional communication parallel port
between the printer and the PC. Our MFC
4550plus also has a bi-directional parallel
port function. Since Windows® 3.XX does not support bi-directional communication on
the parallel port, each peripheral vendor has developed and supplies their own bi­
directional device driver, which will be installed into Windows® 3 .xx. If you install two
or more different bi-directional device drivers into Windows®, they might conflict with
each other and cause some problems.
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