Brother MFC-7340 - Manual (Page 151)

Printing and Faxing
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d Choose Facsimile from the Output pop-up menu.
e Enter a fax number in the Input Fax Number box, and then click Print to send the fax.
Note
If you want to send a fax to more than one number, click Add after entering the first fax number. The
destination fax numbers will be listed in the dialog box.