Lexmark 5000 Series - Manual (Page 23)

2 Connect one telephone cord into the LINE port of the printer, and then plug it into an active telephone wall
jack.
3 Remove the protective plug from the EXT port of the printer.
4 Connect a second telephone cord from the telephone to the answering machine.
5 Connect a third telephone cord from the answering machine to the EXT port of the printer.
Connecting to a computer with a modem
Connect the printer to a computer with a modem to send faxes from the software application.
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