Cellular Phones

Cell phones have had a longer history then the radio. Back in 1920, the cell phones started and the radios weren’t used until 1921. Of course, some of the features of the cell phone were utilized as far back as the 1940s. Those radios were used by the police.

The mobile car phone was developed as the idea of the cellular phone in 1947. Bell Laboratories developed the idea or concept of the cellular phone. Cells for mobile phone stations were developed to. Russell Ohl developed a device that electrical energy was converted from light energy. A buzzing hornet sound came when trying to eavesdrop on a conversation and therefore teh name Green Hornet was given to the prototype. Taxicabs and police cars has a long history or two-way radios form Motorola. The year of 1973 was the invention of the actual cell phone. Martin Cooper and assisting inventers are given the credit. “Radio telephone system” is what is was known as.

On a New York City street to the amazement of the people walking, Cooper was the first person to make a call on the portable cell phone. The Motorola DynaTAC prototype was used. He made the call to Joel Engel of the AT&T Bell Lab. From this technology there was a shift from the workplace to the person. The birth of personal wireless communications from the vision of Cooper, was born.

In 1978, Bell Labs introduced the first commercial cellular network in Chicago using AMPS (Advanced Mobile Phone System). This was an analog mobile phone system. It became the primary analog mobile phone system in North America and is still widely available today, although it’s used much less since the introduction of various digital standards.

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.

On a side note, today Cell phone GPS is becoming very popular worldwide.

Ray Sabo - http://www.Cellphones-Mp3.com