Реферат: The Telephone System Essay Research Paper The

special frequency of electricity sent by the telephone number typed in. The

dial is the region on the phone where numbers are pushed or dialed. There are

two types of dialing systems; the rotary dial, and the Touch-Tone. The rotary

dial is a movable circular plate with the numbers one to nine, and zero. The

Touch-Tone system uses buttons that are pushed, instead of the rotary that send

pulses.

The telephone was said to be invented by many people. However, the

first to achieve this success, although by accident, was Alexander Graham Bell.

He and his associate were planning to conduct an experiment, when Mr. Bell spilt

acid on himself in another room, and his associate clearly heard the first

telephone message: “Mr. Watson, come here; I want you.” Although Alexander

Graham Bell had invented the telephone, his case had to be defended in court

more than 600 times for this to be proven.

After the invention of the telephone, many other great technological

advances were made, which boosted the telephone into a worldwide affair. The

first great advance was the invention of automatic switching. Next, long

distance telephone calls were established in small steps. For example, from

city to city, across a country, and across the ocean. Following this, undersea

cable and satellites, which made it possible to link points halfway around the

earth sounding as if from next door. Finally, by adding three digit area codes,

all phone calls, either to next door or around the world, could be done by the

caller.

The first telephone company to establish a telephone industry was the

Bell Telephone Company, in 1877, by Alexander Graham Bell. This did last for

sometime, however, independent telephone companies were started in many cities

and small towns. By 1908, many customers were being served by a new company

called AT&T, which eventually bought out the Bell Company. Since it was costly

to have the wires run to a household, many residential people often shared lines,

which is called a party line. Although these lines were cheaper for the