Brother MFC 5840CN - Manual (Page 51)

7 - 4 BROTHER INTERNET FAX PRINTING SOFTWARE
NC9100h_FM6.0
Changing the BFP Port Settings
If you have more than one networked machine with this Print/Fax
Server you may want to change the settings of the BFP software to
use an alternative machine as the network fax print server.
To alter BFP settings, select Start | Printers and Faxes to open the
Printers dialogue box. From the Printers windows illustrated below
highlight the Brother Internet Fax and right click the mouse. From
the list presented select Properties.
You are now presented with the screen below, which allows you to
configure the BFP settings. To change the details of the print server,
select the Ports tab.