Lexmark MX521
From the control panel
Press and hold the 5 key until you hear a voice message.
Select OK.
From the keyboard
Press Tab to navigate the focus cursor to the OK button, and then press Enter.
Notes:
This guide lists the sources of information for your printer, from setting it up to troubleshooting its problems.
Are your fax messages not going through? Make sure that your printer is connected to a working analog telephone service.