Difference between revisions of "Cellular telephone"
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A '''cellular telephone''' is a hand held device used for communicating, commonly known as a "cell phone" in the [[United States]], and also known as a "mobile phone" in [[Britain]], [[Ireland]] and [[Australia]]. | A '''cellular telephone''' is a hand held device used for communicating, commonly known as a "cell phone" in the [[United States]], and also known as a "mobile phone" in [[Britain]], [[Ireland]] and [[Australia]]. | ||
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| + | ==History== | ||
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| + | The principle behind cell phones, transmitting waves modulated with sound signals (see methodology) was first seen in radio communications developed in the 1920's. However the potential of this technology was not realised for many years, and the move towards the networks used today did not begin until 1947, when Bell Laboratory engineers Douglas Ring and Rae Young proposed using hexagonal grids with base towers at the corners (rather than in the centers) to allow communication. This creation of the "cellular concept" resulted in increased research into the possibility of evolving commonly used 2-way radio communication into real time speech. | ||
== External links == | == External links == | ||
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| + | * [http://www.sri.com/policy/csted/reports/sandt/techin2/chp4.html SRI - The Cellular Telephone] | ||
| + | * [http://www.privateline.com/mt_cellbasics/ Privateline - The Cellular Telephone] | ||
[[Category:Technology]] | [[Category:Technology]] | ||
Revision as of 01:44, September 7, 2007
A cellular telephone is a hand held device used for communicating, commonly known as a "cell phone" in the United States, and also known as a "mobile phone" in Britain, Ireland and Australia.
History
The principle behind cell phones, transmitting waves modulated with sound signals (see methodology) was first seen in radio communications developed in the 1920's. However the potential of this technology was not realised for many years, and the move towards the networks used today did not begin until 1947, when Bell Laboratory engineers Douglas Ring and Rae Young proposed using hexagonal grids with base towers at the corners (rather than in the centers) to allow communication. This creation of the "cellular concept" resulted in increased research into the possibility of evolving commonly used 2-way radio communication into real time speech.