Cell Phone History
In the early 1920s the Detroit Police Department was the first government agency to use mobile radiotelephones in their patrol cars. At this time only one-way service was available, the pertinent information could be sent to the police vehicle but no response to the call was possible. Some five years later two-way service was introduced by a police department in New Jersey. This capability was then also made available for those private citizens that could afford it. The basic concept of cellular phones began in 1947, when researchers looked at crude mobile (car) phones and realized that by using small cells (range of service area) with frequency reuse they could increase the traffic capacity of mobile phones extensively. Unfortunately at the time, the technology did not exist. In 1947, AT&T proposed that the FCC (F
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Some common words found in the essay are:
Police Department, Communications Commission, Bell Labs, Chicago Ameritech, DC Baltimore, Industry Association, Interim Standard, cell phone, CDMA IS-95, United GSM, IS-136 CDMA, at&t bell labs, cdma is-95, at&t bell, bell labs, is-136 cdma, tdma is-136, mobile phones, cellular service, tdma is-136 cdma, service available, is-136 cdma is-95, cellular phone,
Approximate Word count = 556
Approximate Pages = 2 (250 words per page double spaced)
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