What is fax machines?

A fax machine, short for facsimile machine, is a device that transmits and receives documents electronically over a telephone line. It scans the document, converts it into an electronic signal, and sends it to another fax machine, which then prints a copy of the original document. Although largely replaced by email and digital document sharing, fax machines are still used in some industries for secure document transmission, especially where original signatures are required.