Telecommunication is the transmission of messages, over significant
distances, for the purpose of communication. In earlier times,
telecommunications involved the use of visual signals, such as
smoke, semaphore telegraphs, signal flags, and optical heliographs,
or audio messages via coded drumbeats, lung-blown horns, or sent by
loud whistles, for example.
In the modern age of electricity and electronics,
telecommunications has typically involved the use of electric means
such as the telegraph, the telephone, and the teletype, the use of
microwave communications, the use of fiber optics and their
associated electronics, and/or the use of the Internet. The first
breakthrough into modern electrical telecommunications came with
the development of the telegraph during the 1830s and 1840s. The
use of these electrical means of communications exploded into use
on all of the continents of the world during the 19th century, and
these also connected the continents via cables on the floors of the
ocean. These three systems of communications all required the use
of conducting metal wires.
A revolution in wireless telecommunications began in the first
decade of the 20th Century, with Guglielmo Marconi winning the
Nobel Prize in Physics in 1909 for his pioneering developments in
wireless radio communications. Other early inventors and developers
in the field of electrical and electronic telecommunications
included Samuel F.B. Morse and Joseph Henry of the United States,
Alexander Graham Bell of Canada, Lee de Forest of the U.S., who
invented the amplifying vacuum tube called the triode, Edwin
Armstrong of the U.S., John Logie Baird of England, and Nikola
Tesla whose most important inventions were created in the United
States.
Telecommunications play an important role in the world economy and
the worldwide telecommunication industry's revenue was estimated to
be $3.85 trillion in 2008.[1] The service revenue of the global
telecommunications industry was estimated to be $1.7 trillion in
2008, and is expected to touch $2.7 trillion by 2013.[
Cache is a painted mint can that my kids made and placed....
. This cache is best looked for when there is no workmen working on
site as it is a telecom building (there is no sign of 'No
trespassing' but......) Will make the hint a good 1 so a fast 'in
and out'