Minolta Scanner Mode - Manual (Page 213)

11 Distribution of Fax Documents
11-2 Scanner Mode
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Tip
Forwarding destinations are prioritized in the following order: “Dial-in”,
“Caller-ID”, “F-Code”, “Reception Port” or “Public Document”.
By specifying a one-touch key as a forwarding destination, the
received fax will be forwarded as TIFF or PDF image data.
F codes are used in various other ways, such as a mailbox or a bulletin
board.
When specifying F codes, we recommend using control number, for
example, to classify the data by function.