All-in-one printers offer both analog fax options and digital fax options for faxing. To use analog fax on an all-in-one printer, you’ll need to make sure you have fax kit installed and you’ll need connect a phone line that’s dedicated to fax to the printer. Once your all-in-one printer is connected to the phone line, put the document you want to fax into the document feeder, enter the recipient’s fax number, and press send. Alternatively, if you don’t have a fax kit installed or access to a phone line, you can utilize digital fax services for your all-in-one printer.