Brother MFC 8220 - Manual (Page 115)

USING THE WINDOWS ® -BASED BROTHER SMARTUI CONTROL CENTER 5 - 27
Fax setting
(PC-Fax using the Brother Fax Driver)
The MFC includes a PC-Fax driver, which allows any Windows
Application to send a Fax as simply as printing an original document.
The Brother SmartUI Control Center automatically configures the
Fax button to use the Brother PC-FAX driver, no user configuration
is required.
The Scan Action tab is set to Application and should not be changed.
To change the PC-FAX settings click the Link Preferences button
found in the configuration tab.