Mobile Phone: From the Source to Our time

Nowadays, you can observe mobile telephone in the hands of nearly every person in a megapolis. But if you ask a question who created the earliest cell telephone, or at least which corporation did it, the answer is silence. The chief cell phone was discovered in the midst of twentieth century by big communication company.

The earliest proposition to create a portable phone belongs to AT&T, (the corporation that also suggests cheap calling cards to Japan), or rather Bell Labaratories. It was rather intrepid proposition for 1947, but the creators confined themselves initially to the idea of telephone appointed rarely for placing in a vehicles. They come across the trouble of great weight of phones at that period (about 30-40-kg), and it was inconveniently to use such apparatus.

The inventors tried to find the way out of the obstacle of great mass of phones in 1950. Already in 1970 the telephones' their shed superfluous mass and their weigth was about 12-14-kilos, still and all there was an obstacle of autonomous energy, and they still used a board network of a a vehicle. During that period, Motorola was suggested portable radio transmitters, but they didn't think over cellular phones creating.

A new era of telecommunications started when Martin Cooper, a fresh developer of Motorola, came to the corporation in 1954. His major object was the making of new portable apparatuses. In 1967 Chicago police became their main customer who ordered portable radio. After working for Motorola for about twenty years Martin understood his capability to make a small cell telephone.

In the course of year, design efforts of creating the chief mobile telephone were made. While the company motived Federal Communications Commission (FCC), that private firms would demand gratuitous frequencies for the inculcation of cellular telecommunication. They felt doubt about the corporations' request of frequencies, mainly because of the engineers of the big and well-known Bell Laboratories, who had uncertainties as to the creation of such tiny telephones in the nearest futurity. Nevertheless, a advantageous solution was accepted: Motorola was to prove the propobility of creation such networks.

It's hardly to believe that they imagined there would be calling cards in our time. They fastly began to prepare for the first test program of April 3rd, 1973. The first transponder station was placed on the peak of Alliance Capital Building in New York City that day. The first model of BS could service no more than 30 subscribers and connect them with telecommunications. That cell phone was called Dyna-Tac. It has twelve buttons.

The phone wasn't featured by no more else, even monitor. The accumulator is permitted to communicate 35 min, but it should have been charged more than ten hours. That morn of April 3, M. Cooper took that device and ranged Joel Engel, the principal of the research section of Bell Laboratories. Undoubtedly, it was a success of Cooper and the company Motorola at all. Later they understood that Dyna-Tac was a overturn in science and communications in particular. Today a mobile telephone has become one of the most widespread apparatus as well as calling cards.