Baltimore-Washington telegraph line

The Baltimore-Washington Telegraph Line was the first long-distance telegraph system set up to run overland in the United States, the intention being to utilize the telegraph code system - Morse Code - invented by Samuel Morse. Along with similar transmission networks in Europe, it was a precursor to transatlantic telegraphic communications and later technologies such as telephone, fax and email.

In 1843 the United States Congress appropriated $30,000 to Samuel Morse in order to lay a telegraph line from Washington, D.C. to Baltimore, Maryland. The company's first experimental line was demonstrated on May 24, 1844 and commenced with the transmission of Morse's first message, "What hath God wrought!", a phrase from the Bible's Book of Numbers. The phrase was suggested by Annie Ellsworth, whose husband was a supporter of Morse's.

External links

International Morse code

Transmission methods	Electrical telegraph On-off keying Continuous wave Modulated continuous wave Heliograph Signal lamp

Notable signals	SOS CQD Morse code mnemonics Prosigns for Morse code Morse code abbreviations Q code Z code

Other writing systems in Morse code	American Morse code Greek alphabet Cyrillic alphabet Hebrew alphabet Arabic alphabet Wabun code Chinese telegraph code

Telecommunications

History	Beacon Broadcasting Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Smoke signals Telecommunications history Telegraphy Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony

Pioneers	Edwin Howard Armstrong John Logie Baird Alexander Graham Bell Tim Berners-Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Papin Tissot Alfred Vail Charles Wheatstone Vladimir K. Zworykin

Transmission media	Electromagnetic radiation Electrical cable Free-space optical communication Molecular communication Optical fiber

Network topology and switching	Links Nodes Terminal node Network switching (circuit packet) Telephone exchange

Multiplexing	Space-division Frequency-division Time-division Polarization-division Orbital angular-momentum Code-division

Networks	ARPANET BITNET Cellular network Computer Ethernet FidoNet Internet ISDN LAN Mobile NGN Public Switched Telephone Radio Telecommunications equipment Television Telex WAN Wireless World Wide Web

Category Portal

This article is issued from Wikipedia - version of the Saturday, March 12, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Baltimore-Washington telegraph line

See also

External links