Lexmark X63 Getting Started Manual page 14

Your All-In-One will learn the distinctive ring of the telephone number
you dial.
4
Press Setup.
5
Press Menu until you see FAX RECEIVE MODE on the display.
6
Press Options until you see DRPD, and then press Start.
The All-In-One detects the ring pattern it has learned and automatically
answer all incoming faxes on the second ring. All other ring patterns are
ignored.
Note: DRPD now appears as a fourth fax receive mode in the
operator panel menu.
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