Lexmark CX920
From the home screen, touch Settings > Device > Preferences > Run Initial Setup.
Turn off the printer, wait for about 10 seconds, and then turn it back on.
From the Before You Begin screen, select Change the Settings and Continue with the Wizard.
From the Fax/Email Server Setup screen, enter the needed information.
Finish the setup.
Learn how to set up your printer to send faxes through a cable internet service.
Enable your printer to send faxes through the voice channel of a digital subscriber line.