Telecommunication

Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or other electromagnetic systems. Telecommunication occurs when the exchange of information between communication participants includes the use of technology. It is transmitted through a transmission medium, such as over physical media, for example, over electrical cable, or via electromagnetic radiation through space such as radio or light. Such transmission paths are often divided into communication channels which afford the advantages of multiplexing.

History

The history of telecommunication began with the use of smoke signals and drums in Africa, Asia, and the Americas. In the 1790s, the first fixed semaphore systems emerged in Europe. However it was not until the 1830s that electrical telecommunication systems started to appear.

Modern Technologies

Modern telecommunication is founded on a series of key concepts that experienced progressive development and refinement in a period of well over a century.

Digital Modulation and Multiplexing

Digital modulation, largely driven by the rapid proliferation of mobile telephone services, has been instrumental in driving much of the recent development of digital multiplexing techniques.

Networks

A network is a collection of transmitters, receivers, and communications channels that send messages to one another. Some digital communications networks contain one or more routers that work together to transmit information to the correct user.

Telecommunication Systems

Telecommunication systems are generally designed by telecommunication engineers. Telecommunication has a significant social, cultural and economic impact on modern society.

Telephone

The telephone, one of the most common telecommunication systems, sends sound (most commonly, although not necessarily, voice) from one user to the other.

Radio and Television

Radio and television are major broadcasting media. They are part of a spectrum of electromagnetic waves that are sent out to reach receivers.

Internet

The Internet is a worldwide network of computers and computer networks that communicate with each other using the Internet Protocol (IP).

Social Impact

Telecommunication has a profound impact on society. It has bridged distances and made communication across long distances easier.

Economic Impact

Telecommunication has a significant economic impact, contributing to economic growth and productivity.

See Also

• Information Theory
• Data Transmission
• Broadcast Engineering
• Computer Network
• Optical Fiber

References

Telecommunication Resources
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