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Antonio Meucci invented the first telephone.
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The liquid telephone had a vertical metal cone with a piece of parchment stretched over its narrow end at the base. If you shout at the open end of the cone, your voice would make the parchment vibrate so the needle would then move slightly. The needle was wired to a battery and the converting sound waves would go into an electrical signal which would travel along the wire to a receive
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The hinged armature was replaced with an iron disk glued directly to the parchment diaphragm, which improved the instrument’s performance.
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It has a round, camera like opening on the box instrument served as transmitter and receiver and had mouth to ear shifts.
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It is the first set with a combined receiver and transmitter that could be held in one hand.
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People often became confused by using the same device for talking and listening so a new feature was added- a second wooden transmitter receiver. You didn't have to move the
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The blake transmitter greatly improved telephone service. Its walnut case has been mounted on an adjustable stand to make of the earliest desk sets. This instrument employed carbon and transmitted the voice with clear clarity.
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This instrument was the first telephone built for the Bell system by Western Electric.it is one of the first side-winder models on which you turnedthe crank to signal the operator.
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It used a platinum diaphragm for better long distance transmitter.
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An effort to make telephoning more convenient. This was used as an improvement and sometimes resulted in acid on the carpet.
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The first dial telephone exchange is credited to Almon B. Strowger. The switching equipment was sufficiently developed to permit dial installation in larger cities like New York City.
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In 1954, telephone started to become a decorative household item. This colored telephone gained widespread popularity and started becoming available in the color white, green, blue, pink and beige.
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Designed for convenience. It is mostly often used in the kitchen where counter and table space is premium. it was also used in such areas as basements, garages and covered patios. They were also available in white, green, beige, gray, pink and blue colors.
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They are used so that your hands are free to take notes or look up reference material.It also permits conversation between groups at different location.
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They are used so that your hands are free to take notes or look up reference material.It also permits conversation between groups at different location.
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The panel phone mounts flush with the wall. A special feature is a retractable cord that winds up automatically within the set. There are two color combinations: Copper faceplate with beige handset and anodized aluminum faceplate with white handset.
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The dial is replaced by pushbuttons. As each button is pressed two musical tones are generated and transmitted by a central switching office then translated into a series of pulses smaller to those made by the standard telephone dial.
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Now you can see as well as talk. It has touch tone controls to make calls and control
the television screen so you can see the person you're talking to. -
We have a much develop technology today like texting, calling,video call, etc...
