Course Objectives Covered by this Unit
• Analyze telephone networks and network topology
Unit 1
Key Concept 1: Telephone Networks
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Unit Learning Outcomes
Keywords
• Demonstrate an understanding of the history of telecommunications. • Identify the main structures that comprise a telephone network.
Use the following keywords or keyword phrases to search for additional materials to support your work:
• Telecommunications
• Explain what is involved in an interfacing with the local exchange. • Explain what is involved in long distance and ocean networks.
• Transport Area
• Local Loop
• Compare voice and data communication.
• Local Exchange
• Core/Long Haul Networks
• Demarcation
• Explain …show more content…
• In the late 1930s, another process called frequency modulation
(FM) was applied to radio broadcasts.
• The telephone network is a global system that literally has wired all but the most remote areas of the planet.
• This system was not designed all at once; no one knew the exact course it would take.
• By the late 1940s, monochrome, or black and white, television had become a commer-cial success.
• Many engineers, scientists, and inventors fueled its growth by pushing science to new lim-its in a quest to improve communication and share information.
• In 1954, the first coast -to -coast color television broadcast took place. • The laser was invented in 1960.
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• In 1970, Corning used pure silica to create a fiber with a loss of only 32 decibels per mile.
• In 1977 the first full -scale commercial application of fiber -optic communication systems occurred.
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Copyright 2012, ITT ESI
Telephone Hierarchy
Central Office
• To understand the telephone hierarchy, you need to think about