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Monday, March 3, 2014

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Cheap Cell Phones Biography

Source:- Google.com.pk

AT A GLANCE:

Today's communications industry would not be what it is without the contributions made by Richard H. Frenkiel and Joel S. Engel. The big breakthrough came when AT&T Labs researchers Frenkiel and Engel divided wireless communications into a series of cells, then automatically switched callers as they moved so that each cell could be reused. This led to the development of cellular phones and made today’s mobile communications possible. THE STORY

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Invention: mobile telephone

Photo courtesy Motorola

Function: noun / mo·bile tele·phone

Definition: A mobile radiotelephone, often in an automobile, that uses a network of short-range transmitters located in overlapping cells throughout a region, with a central station making connections to regular telephone lines. Also called cellular telephone

Inventor: Joel Engel and Richard Frenkiel

Engel and Frenkiel photo courtesy National Medal of Technology

Criteria: First practical cellular telephone system.

Birth: Richard Frenkiel, March 4, 1943 in Brooklyn, New York

Joel Engel, February 4, 1936 in New York City

Nationality: American

Milestones:

1921 The Detroit Police Department, began experimentation with one-way vehicular mobile service.

1928 Detroit Police commenced regular one-way radio communication with all its patrol cars.

1933 Bayonne, NJ Police Department initiated regular two-way communications with its patrol cars

1936 Alton Dickieson, H.I. Romnes and D. Mitchell begin design of AT&T's mobile phone system

1940 Connecticut State Police began statewide two-way, on the frequency modulated (FM)

1941 FM mobile radio became standard throughout the country following the success in Connecticut

1946 A driver in St. Louis, Mo., placed a phone call,it was the first AT&T mobile telephone call.

1948 wireless telephone service was available in almost 100 cities and highway corridors.

1947 cellular telephone service conceived by D.H. Ring at Bell Labs, but the technology didn't exist

1971 Richard Frenkiel and Joel Engel of AT&T applied computers and electronics to make it work.

1973 Martin Cooper of Motorola made the first cellphone call to his rival Joe Engel of AT&T Bell Labs

1978 AT&T conducted FCC-authorized field trials in Chicago and Newark, N.J.

1979 the first cellular network was launched in Japan.

1982 FCC granted commercial licenses to an AT&T subsidiary, Advanced Mobile Phone Service

1983 AMPS was then divided among the local companies as part of the planning for divestiture

1983 Illinois Bell opened the first commercial cellular system in October

CAPs: Joel Engel, Richard Frenkiel, Alton Dickieson, H.I. Romnes, D. Mitchell, D.H. Ring, William (Bill) C. Jakes, Martin Cooper, ARY, mobile phone, mobile telephone, cell phone, cellular phone, cellphone, wireless phone, SIP, history, biography, inventor, invention.

The Story:

On June 17, 1946 a driver in St. Louis, Missouri., pulled out a handset from under his car's dashboard, placed a phone call and made history. It was the first mobile telephone call. A team including Alton Dickieson, H.I. Romnesand D. Mitchell from Bell Labs, worked more than a decade to achieve this feat. By 1948, wireless telephone service was available in almost 100 cities and highway corridors. Customers included utilities, truck fleet operators and reporters. However, with only 5,000 customers making 30,000 weekly calls, the service was far from commonplace.

That "primitive" wireless network could not handle large call volumes. A single transmitter on a central tower provided a handful of channels for an entire metropolitan area. Between one and eight receiver towers handled the call return signals. At most, three subscribers could make calls at one time in any city. It was, in effect, a massive party line, where subscribers would have to listen first for someone else on the line before making a call.

Expensive and far from "mobile", the service cost $15 per month, plus 30 to 40 cents per local call, and the equipment weighed 80 pounds. Just as they would use a CB microphone, users depressed a button on the handset to talk and released it to listen

Cheap Cell Phones Phone Backgrounds Hd Tumblr Android Pinterest Iphone Quotes For Girls Ios7 for guys