Cell Phone History essays

Cell Phone History essays 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 It was not until 1968 when the FCC reconsidered its position, stating if the technology to build a better mobile service works, we will increase the frequencies allocation, freeing the airwaves for more mobile phones. Both ATcell a few miles in radius and collectively covering a larger area. Each tower would use only a few of the total frequencies allocated to the system. The idea was that as the phones traveled across the area, cal...