Transatlantic telephone cable
A transatlantic telephone cable is a
submarine communications cablethat carries telephone traffic under the Atlantic Ocean.
When the first
transatlantic telegraph cablewas laid in 1858 by businessman Cyrus West Field, it operated for only a month; subsequent attempts in 1865 and 1866 were more successful. Although a telephone cable was discussed starting in the 1920s, to be practical it needed a number of technological advances which did not arrive until the 1940s. Starting in 1927, transatlantic telephone service was radio-based. TAT-1(Transatlantic No. 1) was the first submarine transatlantic telephone cable system. It was laid between Gallanach Bay, near Oban, Scotlandand Clarenville, Newfoundland between 1955 and 1956. It was inaugurated on September 25 1956, initially carrying 36 telephone channels. In the first 24 hours of public service there were 588 London-US calls and 119 from London to Canada. The capacity of the cable was soon increased to 48 channels. TAT-1 was finally retired in 1978.
There have been a succession of newer transatlantic cable systems. All recent systems have used
fiber optictransmission, and a self-healing ringtopology. Late in the 20th century, Communications satellites lost most of their North Atlantic telephone traffic to these low cost, high capacity cables. *first fiber opticcable.
The TAT series of cables constitute a large percentage of all north Atlantic cables. All TAT cables are consortia joint ventures between a number of
telecommunicationscompanies, e.g. British Telecom. CANTAT are Transatlantic Telephone cables terminating in Canada rather than the USA. There are a number of private non-TAT cables.
Other Atlantic cables
Transatlantic telegraph cable
* [http://aronsson.se/hist.html Aronsson's Telecom History Timeline]
* [http://www.atlantic-cable.com/Cables/CableTimeLine/index.htm Timeline of Submarine Communications Cables, 1850-2008]
* [http://www.kidorf.com/DBLandings.php Submarine Cable Landings Worldwide]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Transatlantic telegraph cable — The first transatlantic telegraph cable crossed the Atlantic Ocean from Foilhommerum, Valentia Island, in western Ireland to Heart s Content, in eastern Newfoundland. The transatlantic cable bridged North America and Europe, and expedited… … Wikipedia
Transatlantic cable — may refer to:* Transatlantic telegraph cable * Transatlantic telephone cable … Wikipedia
Transatlantic crossing — For other uses of the term Transatlantic, see Transatlantic (disambiguation). Transatlantic crossings are passages of passengers and cargo across the Atlantic Ocean between the Americas and Europe. Prior to the 19th century, transatlantic… … Wikipedia
Transatlantic — The term transatlantic refers to something occurring all the way across the Atlantic Ocean. Most often, this refers to the exchange of passengers, cargo, information, or communication between North America and Europe.Transatlantic… … Wikipedia
Cable layer — A cable layer or cable ship is a deep sea vessel designed and used to lay underwater cables for telecommunications, electricity, and such. A large superstructure, and one or more spools that feed off the transom distinguish it.ee also*Submarine… … Wikipedia
telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… … Universalium
cable — I n. wire 1) to lay, string cable 2) a submarine cable; the transatlantic cable 3) an electric, power; telegraph; telephone cable cablegram 4) to send a cable 5) a cable from; to II v. 1) (A) we cabled the message to them; or: we cabled them the… … Combinatory dictionary
cable — cablelike, adj. /kay beuhl/, n., v., cabled, cabling. n. 1. a heavy, strong rope. 2. a very strong rope made of strands of metal wire, as used to support cable cars or suspension bridges. 3. a cord of metal wire used to operate or pull a… … Universalium
Cable — /kay beuhl/, n. George Washington, 1844 1925, U.S. novelist and short story writer. * * * (as used in expressions) Cable News Network cable modem cable structure cable television coaxial cable * * * ▪ electronics … Universalium
Submarine communications cable — A cross section of a submarine communications cable. 1 Polyethylene 2 Mylar tape 3 Stranded steel wires 4 Aluminium water barrier 5 Polycarbonate 6 Copper or aluminium tube 7 Petroleum jelly 8 Optical fib … Wikipedia