The word TELECOMMUNICATION is a combination of two words

The word TELECOMMUNICATION is a combination of two words -...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
o The word TELECOMMUNICATION is a combination of two words. .. The word TELE in Latin means DISTANCE . Hence Telecommunication is DISTANCE COMMUNICATION. The necessity of communication begun as early as the existence of mankind on this earth . Communication has become the vital tool for mankind to strife prosperously in this world. C ommunication : Is the system which make a contact between two or more persons or it is the way to transfer from place to another. Fig 1 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
On March 10 , 1876 , in Boston, Massachusetts, Alexander Graham Bell invented the telephone. Thomas Watson fashioned the device itself; a crude thing made of a wooden stand, a funnel, a cup of acid, and some copper wire. But these simple parts and the equally simple first telephone call. Bell developed new and original ideas but did so by building on older ideas and developments. Bell succeeded specifically because he understood acoustics, the study of sound , and something about electricity . Sound waves are acoustic waves , with no electrical component . They are simply vibrations in the air, a physical pressure made by the utterance of the speaker. History Beginning at the start of Human History Some say Francis Bacon predicted the telephone in 1627 , however, his book New Utopia only described a long speaking tube . A real telephone could not be invented until the electrical age began. In 1753 an anonymous writer, possibly physician Charles Morrison, suggested in The Scot's Magazine that electricity might transmit messages. 2
Background image of page 2
Experiments continued slowly until 1800. In 1 830 the great American scientist Professor Joseph Henry transmitted the first practical electrical signal. In 1837 Samuel Morse invented the first workable telegraph, applied for its patent in 1838, and was finally granted it in 1848. In 1854 Charles Bourseul wrote about transmitting speech electrically in a well circulated article. In 1861 Johann Phillip Reis completed the first non-working telephone . Tantalizingly close to reproducing speech . On June 2, 1875 , Bell and Watson were testing the harmonic telegraph when Bell heard a sound come through the receiver. 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The two most important developments were the invention of the vacuum tube and the transistor ; today's telephone system could not have been built without them On April 27, 1877 Thomas Edison filed a patent application for an improved transmitter, a device that made the telephone practical 1877 Western Union created the American Speaking Telephone Company. In 1878 President Rutherford B. Hayes administration installed the first telephone in the White House . In that year the Butterstamp telephone came into use. This telephone combined the receiver and transmitter into one handheld unit. On
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 64

The word TELECOMMUNICATION is a combination of two words -...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online