History of telecommunications

Canadian-American scientist inventor of telephone (1847–1922)

Telephony ( ) is the field of technology involving the development, application, and deployment of telecommunications services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone.

long range communications device placed underwater, often intercontinental

variety of domestic pigeon selectively bred to find its way home over extremely long distances

thumb|Teletype Corporation|Teletype teleprinters in use in England during [[World War II|alt=|250x250px]] thumb|Example of teleprinter art: a portrait of [[Dag Hammarskjöld, 1962|alt=]]

Nortel Networks Corporation, formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario. It was founded in Montreal, Quebec, in 1895 as the Northern Electric and Manufacturing Company, or simply Northern Electric. Until an antitrust settlement in 1949, Northern Electric was owned mostly by Bell Canada and the Western Electric Company of the Bell System, producing large volumes of telecommunications equipment based on licensed Western Electric designs.

French inventor

smoke used as a mode of communication

tendency for technologies that were originally largely unrelated to unify as they develop

system of visual communication

television production broadcast in real-time, as events happen, in the present

thumb|Fig. 1: Signaling with a Mance heliograph; Alaska–Canada border, 1910.

right|thumb|upright=1.3|Bullroarers from Africa in the Pitt Rivers Museum

aspect of history

emulation of speech by whistling

thumb|alt=An image of darkened brass historical plaque with a streak of green corrosion running down it, mounted on the exterior side of a brick building. |A historical plaque on the side of the Franklin School in Washington, D.C. which marks one of the points from which the photophone was demonstrated thumb|A diagram from one of Bell's 1880 papers

CQD (transmitted in Morse code as ) is one of the first distress signals adopted for radio use. On 7 January 1904 the Marconi International Marine Communication Company issued "Circular 57", which specified that, for the company's installations, beginning 1 February 1904 "the call to be given by ships in distress or in any way requiring assistance shall be 'C Q D.

type of cipher

use of homing pigeons to carry messages

BITNET was a co-operative university computer network in the United States founded in 1981 by Ira Fuchs at the City University of New York (CUNY) and Greydon Freeman at Yale University. The first network link was between CUNY and Yale.

visual signaling device for optical communication

thumb|right|300px thumb|right|350px|Slight timing errors are compensated for by redundancy (engineering)|printing each line twice.

telecommunications system

American inventor and businessperson; assistant to Alexander Graham Bell (1854–1934)

a television system that relies on a mechanical scanning device, to both scan and reproduce the video signal

thumb|Artist's vision of Syncom satellite, 1963 Syncom (for "synchronous communication satellite") started as a 1961 NASA program for active geosynchronous communication satellites, all of which were developed and manufactured by the Space and Communications division of Hughes Aircraft Company (now the Boeing Satellite Development Center). Syncom 2, launched in 1963, was the world's first geosynchronous communications satellite. Syncom 3, launched in 1964, was the world's first geostationary satellite.

aspect of history relating to telecommunications

system of beacons stretching across Anatolia

espionage mission of the USA directed to the Soviet Union

Wirephoto, telephotography or radiophoto is the sending of photographs by telegraph, telephone or radio.

history of U.S. and allied governments' attempts to limit the public's and foreign nations' access to cryptography

air pipe through which speech can be transmitted over an extended distance

digital communication media

term

mostly-obsolete version of the AMPS mobile phone system formerly used in some European countries

Semaphore systems using water-based mechanisms

1960s experimental communications satellites

In some origins and or religions drum maybe used in ceremonies

Phryctoria () was a semaphore system used in Ancient Greece. The phryctoriae were towers built on selected mountaintops so that one tower (phryctoria) would be visible to the next tower (usually 20 miles away). The towers were used for the transmission of a specific prearranged message. One tower would light its flame, the next tower would see the fire, and light its own.

a wooden object carried by a messenger to rally people

aspect of history

U.S. National Historic Landmark research laboratory

A mailgram is a type of telegraphic message which is delivered to the recipient by the post office. Mailgrams are received at a mailgram center by telephone, teletypewriter service or computer. Each message is placed in a special envelope and dispatched to the local post office for delivery with the mail.

company

telegraphy transmission method

first modern routers on the Internet

Racal Electronics plc was a British electronics company that was founded in 1950. Listed on the London Stock Exchange and once a constituent of the FTSE 100 Index, Racal was a diversified company, offering products including voice recorders and data recorders, point of sale terminals, laboratory instruments and military electronics, including radio and radar. At its height, Racal was the third largest British electronics firm; it operated worldwide and employed over 30,000 people. £1,000 invested in Racal in 1961 would have been worth £14.5million in 2000.

American inventor