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Beginning Of The Cell Phone |
By:
Raymond Sabo |
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Beginning Of The Cell Phone
Raymond Sabo
Cellular Phones
Believe it or not, cell phones have a longer history then the radio. Cell phones started off in the 1920's and radios were first used in 1921. Some of the cell phone features were used in radios way back in the 1940s. Police used these radios.
The idea of the cellular phone was developed in 1947 as a mobile car phone. Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) produced the concept of the cellular phone by introducing cells for mobile phone base stations. Russell Ohl developed the photovoltaic cell (a device that converts light energy into electrical energy.) In 1943, Bell developed SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet), the first digital scrambled speech transmission system used in World War II for the highest-level Allied communications. SIGSALY is not an acronym. It was intended to look like an acrynim but it was just a cover name. SIG was common in Army Signal Corps names. The prototype was called Green Hornet because it sounded like a buzzing hornet to anyone trying to eavesdrop on the conversation. Motorola has a long history of making automotive radio, especially two-way radios for taxicabs and police cruisers. The first actual cell phone was invented in 1973 by Martin Cooper of Motorola and other assisting inventors. It was called the "radio telephone system." He used the idea of the car phone and applied the technology required to make a portable cell phone a reality.
While people were walking on a New York City street in 1973, Cooper made the first portable call on a cell phone. A prototype called Motorola DynaTac was used. Joel Engel was the person he made the call to. From this, the technology and communications market shifted from the place and to the person.
AMPS (Advanced Mobile System) was used and it introduced the first commercial network in Chicago in 1978. Analog as a name the mobile phone was known as. Various digital standards have come into play so there is a less desire for the analog mobile phone in North America.
Cell phones were first made available to the public in 1984 although they were very large, expensive instruments. The Federal Communications Commission worked together with AT&T and Bell Towers to establish broadcast towers. The towers were small with little power and covered a "cell" that was actually only a few miles in radius but could cover a larger area. Towers allowed calls to transfer from tower to tower.
Just another view, the GPS Cell phone is widely being known today.
http://wwwcellphones-mp3.com - Ray Sabo
The history of the http://www.cellphones-mp3.com/ mobile phone is amazing. They have progressed so far that there is a http://www.cellphones-mp3.com/ prepaid cell phones today.
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Article Source: http://www.statssheet.com/articles/article70907.html |
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