Lexmark MX331
Notes:
Open a web browser, and then type the printer IP address in the address field.
Click Settings > Fax > Fax Setup > General Fax Settings.
Note: Fax Setup appears only if Fax Mode is set to Fax.
In the Fax Name field, type a unique name.
In the Fax Number field, enter the fax number that etherFAX provided.
From the Fax Transport menu, select etherFAX.
Apply the changes.