Set the parameters in the printer.
From the control panel, navigate to the menu for the port settings.
Locate the menu for the serial port settings, and then adjust the settings, if necessary.
Apply the changes.
From your computer, open the printers folder, and then select your printer.
Open the printer properties, and then select the COM port from the list.
Set the COM port parameters in Device Manager.
Connect your printer directly to an active telephone wall jack or share a line with an answering machine or voice mail service.
Set up your printer to send faxes through broadband telephone service connection.