Title: Invention of The Telephone - Who Invented The Telephone - InventionReaction
Headings: Invention of the Telephone
Invention of the Telephone
Content: The system however proved time consuming, as the exchange was controlled by a large switchboard with a number of operators working manually to divert the calls. The first automatic exchange was patented by Almon Strowger in 1891 and instilled in 1892, although manual switchboards remained in place until the mid-twentieth century. In 1889, William Gray invented the coin operated telephone, whereas the first rotary dial telephone was produced by Frenchman, Antoine Barnay, in 1923. The Bell Telephone Company later developed the mobile telephone which was used by New York police cars in 1924. The first commercial mobile service was created in 1946, in St Louis, Missouri but it did not become commonplace until a following four decades. Touch tone systems, which used sound tones rather than electrical pulses, were installed in 1941, however the need for central switching made the idea too expensive, yet Bell's company were curious as to the potential of touch tone employment. As electrical circuitry prices fell, the touch tone systems could finally be deployed in common households, which occurred in 1962. AT&T began experimentation with cells within mobile technology, primarily based on hexagonal geographical regions. As the caller moved from one cell to another, the communication link would remain intact, by automatically switching to the new cell without any form of disruption. This foundation for mobile phone technology was put into place in the United States in 1983.