facsimile telegraph

A facsimile telegraph, commonly known as a fax machine, is a device that transmits and reproduces documents over distance using wire or radio waves. The term "facsimile" comes from the Latin phrase "make alike," meaning to create an exact copy.123

Early forms of telegraphy, dating back to ancient times, used methods like smoke signals or drums. The first optical semaphore system, a visual telegraph, was developed in France in 1791. The electric telegraph, which revolutionized communication in the mid-19th century, uses coded signals transmitted over wires or radio waves.4

The facsimile telegraph specifically reproduces matter such as messages, drawings, or pictures in facsimile. Modern fax machines scan documents and transmit them via the telephone network, where similar machines reproduce the document, creating a close replica of the original. This technology significantly impacted business and personal correspondence, often replacing traditional telegraphic services.12