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2.2.3.2 Signal Transmission

Encyclopedia/2. Technology & The Built World/1. Computing, AI & Information Technology/04. Networks, Internet & Cryptography  •  Curated by Admin Timeline.sg

Chronological Storyline (11 Milestones)

1000 BCE

Beacon, drum & smoke signals

Cultures worldwide relay messages over distance with fire beacons, talking drums and smoke. Source — Wikipedia:

1792 CE

Chappe’s optical telegraph

Claude Chappe’s semaphore towers relay messages across France faster than any rider. Source — Wikipedia:

1844 CE

Electric telegraph & Morse code

Samuel Morse’s telegraph and code send text instantly along wires, shrinking distance. Source — Wikipedia:

Samuel Morse and The Telegraph | Simple History
Samuel Morse and The Telegraph | Simple History
1866 CE

Transatlantic telegraph cable

A working cable links Europe and North America, enabling near-instant intercontinental messaging. Source — Wikipedia:

1876 CE

Bell’s telephone

Alexander Graham Bell patents the telephone, carrying the human voice over wires. Source — Wikipedia:

Alexander Graham Bell: The Voice of Invention | Full Documentary | Biography
Alexander Graham Bell: The Voice of Invention | Full Documentary | Biography
1895 CE

Bose & Marconi’s wireless

Jagadish Chandra Bose demonstrates microwave signalling; Marconi achieves long-range radio telegraphy. Source — Wikipedia:

Guglielmo Marconi: The Invention of Wireless Telegraphy & Radio | History of Communication
Guglielmo Marconi: The Invention of Wireless Telegraphy & Radio | History of Communication
1927 CE

Television

Philo Farnsworth and others transmit moving images electronically, founding broadcast television. Source — Wikipedia:

JOHN LOGIE BAIRD: The Forgotten Father of Television | myDocumentary
JOHN LOGIE BAIRD: The Forgotten Father of Television | myDocumentary
1962 CE

Telstar communications satellite

Telstar relays the first live transatlantic television, opening the satellite-communications age. Source — Wikipedia:

Universal News Reel covers the Telstar 1 communications satellite, July 23, 1962 | NASA Archives
Universal News Reel covers the Telstar 1 communications satellite, July 23, 1962 | NASA Archives
1966 CE

Kao’s optical fibre

Charles Kao shows glass fibres can carry light-borne data over long distances (Nobel, 2009). Source — Wikipedia:

1990 CE

GPS & global satellite constellations

Dense satellite constellations deliver worldwide positioning, timing and broadband signalling. Source — Wikipedia:

2016 CE

Quantum communication satellite

China’s Micius satellite demonstrates quantum-encrypted communication over thousands of kilometres. Source — Wikipedia: