Masters of Computer Science

Introduction and Evolution of Telecommunication

Introduction of Telecommunication

Telecommunication: Definition

Telecommunication is communication over a distance. The communication can be by cable, telegraph, telephone or broadcasting medium.

Here, tele means distance

In other words, telecommunication is exchange of information over distance by electronics mean. The medium can be voice, data or even video.

ITU defines telecommunications as ‘‘any transmission, emission, or reception of signs, signals, writings, images, and sounds; or intelligence of any nature by wire, radio, visual, or other electromagnetic systems.’’

Telecommunication Tree

The trunk of the tree represents the technological prerequisites for successive unfolding of the various telecommunication domains into the branches of the tree

The leaves of the branches represent evolution within the separate telecommunication domains

Evolution of Telecommunication

Major Dates:

  • 1876 – Alexendar Graham Bell invented telephone. At both ends, interpreter or telegrapher was required at initial. These telephones were intercom systems
  • 1877 – Switchboard exchange telephone system was invented. It enabled combination of two phones to connect and talk.
  • 1891 – Invention of dial telephone. Made calls via telephone quicker
  • 1947 – Invention of transistors.
  • 1948 – For transmission of phone signals, microwave was used where wire was not there.
  • 1960 – Transition of phones from mechanical switching to electromic switching. This enabled voice messaging, caller ID etc.
  • 1971 – First email was sent
  • 1973 – First mobile (Cellular) phone was introduced
  • 1984 –
  • 1990 – Modern internet
  • 200s – Mobile phone grow
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