Brother FAX-1820C Software User's Manual page 54

The vCard used must contain a work fax or home fax number.
When you choose work fax or home fax from the Stored Fax
Numbers pull-down list, only the fax number stored in the
®
Mac OS X Address Book for the selected category will be
®
used. If the fax number is stored in only one of the Mac OS X
Address Book categories, the number will be retrieved no matter
which category you have selected (work or home).
®
USING YOUR MACHINE WITH A MACINTOSH 3 - 11