thumb|Copy of Alexander Graham Bell's original telephone, at the Musée des Arts et Métiers in Paris Telecommunication is the assisted transmission of signals over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, drums, semaphore, flags or heliograph. In modern times, telecommunication typically involves the use of electronic devices such as the telephone, television, radio or computer. Early inventors in the field of telecommunication include Alexander Graham Bell, Guglielmo Marconi and John Logie Baird. Telecommunication is an important part of the world economy and the telecommunication industry's revenue was estimated to be $1.2 trillion in 2006.
Welcome to CWAnswers
CWAnswers is your guide to the sprawling world wide web. The directory aims to provide a useful guide made by users. You can share your knowledge as well - simply sign up and edit your first entry. For questions just contact the team at support - at - cwanswers.com.
Weblinks for Telekom
Top 10 for Telekom
Things about Telekom you find nowhere else.
Select content modules
Telekom
Pregnancy Blog. Formula 1. Impotence. Colon Cancer. Home Improvement. Network Marketing ... Telekom Malaysia inks deal with Alcatel-Lucent ...tipon.blogspot.com/Telekom — Blogs, Pictures, and more on WordPress
Blogs about: Telekom. Featured Blog. Case closed. Been busy yesterday so didn't update bloggy here. ... Callback from Telekom and Digi ... Telekom sucks! ...en.wordpress.com/tag/telekom/Dialog Telekom — Blogs, Pictures, and more on WordPress
Dialog Telekom brings "radiation antenna" to Eliehouse neighbourhood? — 3 comments ... Exposure to Radiation via Dialog Telekom Transmission Towers? ...en.wordpress.com/tag/dialog-telekom/Analyst Criticizes D. Telekom On Blog For Late-Night Profit Warning ...
By IR Web Report Staff DAIWA Securities Analyst James Enck has publicly criticized German telecommunications giant Deutsche Telekom on his blog for issuing awww.irwebreport.com/daily/2006/08/10/analyst-criticizes-d-te...The Breach Blog: Category Archive for Deutsche Telekom
The Breach Blog is dedicated to the disclosure and open discussion of ... Deutsche Telekom (1) DHL International (1) Dickson County School District (1) ...breachblog.com/categories/Deutsche%20Telekom.aspxthumb|Copy of Alexander Graham Bell's original telephone, at the Musée des Arts et Métiers in Paris Telecommunication is the assisted transmission of signals over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, drums, semaphore, flags or heliograph. In modern times, telecommunication typically involves the use of electronic devices such as the telephone, television, radio or computer. Early inventors in the field of telecommunication include Alexander Graham Bell, Guglielmo Marconi and John Logie Baird. Telecommunication is an important part of the world economy and the telecommunication industry's revenue was estimated to be $1.2 trillion in 2006.
Early telecommunications
160px|thumb|A replica of one of Chappe's semaphore towers.
In the Middle Ages, chains of beacons were commonly used on hilltops as a means of relaying a signal. Beacon chains suffered the drawback that they could only pass a single bit of information, so the meaning of the message such as "the enemy has been sighted" had to be agreed upon in advance. One notable instance of their use was during the Spanish Armada, when a beacon chain relayed a signal from Plymouth to London.
In 1792, Claude Chappe, a French engineer, built the first fixed visual telegraphy system (or semaphore line) between Lille and Paris. However semaphore suffered from the need for skilled operators and expensive towers at intervals of ten to thirty kilometres (six to nineteen miles). As a result of competition from the electrical telegraph, the last commercial line was abandoned in 1880.
Homing pigeons have occasionally been used through history by different cultures. Pigeon post is thought to have Persian roots and was used by the Romans to aid their military. Frontinus said that Julius Caesar used pigeons as messengers in his conquest of Gaul. The Greeks also conveyed the names of the victors at the Olympic Games to various cities using homing pigeons.
Telegraph and telephone
Sir Charles Wheatstone and Sir William Fothergill Cooke invented the electric telegraph in 1837. Also, the first commercial electrical telegraph is purported to have been constructed by Wheatstone and Cooke and opened on 9 April 1839.Fact: date=September 2008 Both inventors viewed their device as "an improvement to the 1 electromagnetic telegraph" not as a new device.
Samuel Morse independently developed a version of the electrical telegraph that he unsuccessfully demonstrated on 2 September 1837. His code was an important advance over Wheatstone's signaling method. The first transatlantic telegraph cable was successfully completed on 27 July 1866, allowing transatlantic telecommunication for the first time.
The conventional telephone was invented independently by Alexander Bell and Elisha Gray in 1876. Antonio Meucci invented the first device that allowed the electrical transmission of voice over a line in 1849. However Meucci's device was of little practical value because it relied upon the electrophonic effect and thus required users to place the receiver in their mouth to “hear” what was being said. The first commercial telephone services were set-up in 1878 and 1879 on both sides of the Atlantic in the cities of New Haven and London.

























