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COM 2400 Final Exam- WMU.
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COM 2400 Final Exam- WMUDefinition of Communication - ANS-Communication at a distance
Telecom in Pre-Electricity - ANS-Pony express, drums, smoke signals, semaphore flags
Shannon-Weaver Model - ANS-Message from a sender is encoded into a medium and
the encoded message is sent out through a channel to a receiver
Telegraph - ANS-Distance writer
Telegraph speed - ANS-Speed of light, 186,000
How the telegraph works - ANS-Wire between two places, broke up a stady flow of
electronic current in different sequences by pressing down a lever
Morse Code - ANS-Dots and dashes, used for telegraph
Telegraph Inventor - ANS-Samuel Morse
Needle Telegraph - ANS-needle points to letters, created by Charles Wheatstone and
William cooke
First Telegraph Network - ANS-First telegraph between Baltimore and DC
Importance of networks - ANS-Devices are worthless without being connected to other
devices
Western Union - ANS-Founded in 1851, monopoly over telegraph
Submarine Telegraph - ANS-Wires under ocean, using Gutt Percha sap to insulate
wires, Promoted by Great Britain to connect to colonies
Atlantic Cable - ANS-Cyrus Field- Us to Europe in 1866
Wire Services - ANS-New agencies, wire news to smaller local newspapers
Examples of Wire Services - ANS-Havas, Reuters, Associated Press
, How a Telephone Works - ANS-Sound energy from the human voice is converted into a
corresponding electric current. Electric current travels through the wires, than is
converted back into sound on the other end
Telephone System - ANS-Each subscriber connected to a central switchboard,
telephone operators mans that switchboard to connect people to one another
Common Carrier - ANS-Service is provided to the public on a nondiscriminatory basis
Telephone Inventors - ANS-Alexander Graham Bell and Thomas Watson; Elisha Gray
worked on a similar invention
Gardiner Green Hubbard - ANS-Funded Alexander Bell- went to patent office to register
the invention an hour before Elisha Gray did
Western Union & Telephone - ANS-Bell and Hubbard wanted to sell invention to
Western Union, but they refused. Later they tried to use Elisha Gray's invention and
were sued by Bell.
Western Electric - ANS-AT&T's manufacturing company
Bell Telephone Labs - ANS-Research and development for AT&T
AT&T Founding - ANS-Started as a long-distance service for Bell Telephone Company-
AT&T became the major company in 1901
Telephone Monopoly - ANS-AT&T held a monopoly over telephones by buying out other
companies and refusing to connect
Theodore Vail and Universal Service - ANS-Head of AT&T in 1907, believed telephone
should be one system, one policy, universal service
Break up of AT&T 1913 - ANS-1913, company went to court told to stop anti-competitive
pratices
Modified Final Judgement 1984 - ANS-AT&T in court again, all telephone services were
separated into local or long distance, AT&T forced to keep just long distance and
divulge Baby Bells
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