Cell Phone
The Cell Phone comes from the invention of the radio and the telephone.
The Radio
The inventor of the radio is named Nikolai Tzesla but the first person to send the first transatlantic radiotelegraph was Guglielmo Marconi. Radio waves were first used to send telegraphic messages primarily across the Atlantic. Then it was used for emergency when ships at sea were in danger. Before cell phones mobile communication had to be installed in cars. This would be called a full-duplex radio. There would be only one tower in city and 25 channels so only 25 people can use them.
The Telephone
The inventor of the telephone is Alexander Graham Bell. He used an experimental telegraph which began to function strangely one day because of an accident. The first words spoken by this telephone was "Mr. Watson, come here; I want you." Alexander had spill acid on himself. It wasn't a later transatlantic phones were possible.
The Cellular Phone
Dr. Martin Cooper is considered the inventor of the first cell phone. The first call was made to Joel Engel, Head of Bell Labs research. In 1977, AT&T and Bell Labs constructed a prototype cellular system and then a year later the first public trial was conducted in Chicago with 2000 customers. The first commercial cellular system began in Japan, Tokyo. By 1982, the Federal Communications Commission authorized commercial use in America.
Cellular Phones in Communication
