History - Telephone Technology
to The History of The Telephone
Service Lines and Switchboards
In 1877, construction of the first
regular telephone line from Boston to Somerville, Massachusetts was completed.
By the end of 1880, there were 47,900 telephones in the United States.
The following year telephone service between Boston and Providence had
been established. Service between New York and Chicago started in 1892,
and between New York and Boston in 1894. Transcontinental service by overhead
wire was not inaugurated until 1915. The first switchboard was set up in
Boston in 1877. On January 17, 1882, Leroy Firman
received the first patent for a telephone switchboard.
Exchanges and Rotary Dialing
The first regular telephone exchange was established in
New Haven in 1878. Early telephones were leased in pairs to subscribers.
The subscriber was required to put up his own line to connect with another. In
1889, Almon B. Strowger a Kansas City undertaker, invented a switch that could
connect one line to any of 100 lines by using relays and sliders. This
switch became known as "The Strowger Switch" and was still in use
in some telephone offices well over 100 years later. Almon Strowger was
issued a patent on March 11, 1891 for the first automatic telephone
The first exchange using the Strowger switch
was opened in La Porte, Indiana in 1892 and initially subscribers had a button
on their telephone to produce the required number of pulses by tapping. An
associate of Strowgers' invented the rotary dial in 1896 which replaced the
button. In 1943, Philadelphia
was the last major area to give up dual service (rotary and button).
The history of the the telephone
and telephone related devices.
the Road to the Telephone
Sometimes several inventors have
the same idea at the same time, but only the one whose invention is successful
in practice stays in our minds.
Line's Telephone Pages
A very well detailed and accurate
website on the history of the telephone.
History of the Telephone
An entire book written in 1910 on
the history of the telephone up to that time.
Everyone knows what a telephone
is, but how does it work?
In 1941, the first touch-tone system
that used tones in the voice frequency range rather than pulses generated
by rotary dials was installed in Baltimore, MD.
History of the Digital Telephone Devices
At Bell Labs in 1948, mathematician
Dr. Claude Shannon published "A Mathematical Theory of Communication,"
which promoted the concept of communicating in binary code. Shannon's paper
formed the basis of the entire digital communications revolution.
Invention of the Alexander GRaham Bell Telephone
Alexander Graham Bell's path to
the invention of the Bell telephone.
A look at how the instrument itself
developed and changed.
of Cellular or Mobile Phones
Technology: Digital Cellular Phones
Disposable Cell Phones
The History of Pagers, Answering
Machines, Telephony Software
Caller ID, Telephone Books, Yellow Pages, 911, Pay Phones
History of Pagers
of Answering Machines
Software - Krisztina Holly
Telephone Switching System - Erna Schneider Hoover
Stephen Black: invented the wave translation
system, eliminates feedback distortion in telephone calls.
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