Chapter Introduction to Data Communications


Introduction: The Information Society


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Introduction: The Information Society

The Information Age

  • Human economic activity can be divided into three broad epochs:
    • 1. The long period in which agricultural and other types of subsistence activities dominated
    • 2. The period since the industrial revolution (ca. 1780) in which machines began to replace human labor
    • 3. The “Information Age” in which human activities are increasingly dependent on the storage and flow of vast amounts of information.

Information Economics

  • Historically, we can say that economic activity is due to the effects of three factors:
    • 1. Land
    • 2. Labor (strategic preindustrial resource)
    • 3. Capital (strategic resource of the industrial age)
  • With the rise of information technologies, information must now be viewed as a fourth, strategically important economic factor.
  • Information is used to determine how the other three factors are best allocated and has value in and of itself.

The Collapsing Information Lag

  • Electronic communications has greatly sped up the rate of transmission of information, beginning with the telegraph in the 1840s.
  • Information that took days or weeks to be transmitted during the 1700s could be transmitted in minutes or hours by 1900.
  • Today, telecommunications networks transmit huge quantities of information in a fraction of a second.
  • In fact, the growth of telecommunications and especially computer networks has been the strongest contributor to the globalization phenomenon we are experiencing today.

A Brief History of Communications in North America

North American Communications: A Brief History (see Figure 1-1)

  • 1837 Invention of the telegraph by Samuel Morse
  • 1876 Invention of the telephone by Alexander Graham Bell
  • 1892 Canadian Government starts regulating telephone system
  • 1910 US Government begins to regulate telephone system
  • 1915 Transcontinental and transatlantic phone service begins
  • 1951 Direct-dialed long distance service begins
  • 1962 Telstar satellite starts relaying international phone calls

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