Fax machine will send an immediate photocopy of files or document that was inputted in fax machine. Internet fax using computer and internet receive and send faxes through user interface site. It is similar to email system, but the server will convert it to fax file to be readable and compatible to fax machines. You can try RingCentral Services.
Hand written file and hand-filled forms are sent via [fax] to have an exact copy if. It can be done using traditional fax or internet fax like extremefax.