Telecommunications
Telecommunications
Telecommunications (pronunciation: /ˌtɛlɪkəˈmjuːnɪkeɪʃənz/), from the Greek words tele meaning "far off" and communication meaning "to share", is the exchange of information over significant distances by electronic means.
A complete, single telecommunications circuit consists of two stations, each equipped with a transmitter and a receiver. The transmitter and receiver at any station may be combined into a single device known as a transceiver. The medium of signal transmission can be via electrical wire or cable (copper wire, coaxial cable, fiber optics), electromagnetic radiation (radio waves), or light (optical communication). The free space transmission and reception of data by means of electromagnetic fields is called wireless communications.
Etymology
The term telecommunication was adapted from the French word télécommunication. It is a compound of the Greek prefix tele- (τηλε-), meaning 'far off', and the Latin communicare, meaning 'to share'. Its modern use is adapted from the French because its written use was recorded in 1904 by the French engineer and novelist Édouard Estaunié.
Related Terms
- Analog signal: An analog signal is any continuous signal for which the time-varying feature of the signal is a representation of some other time-varying quantity.
- Digital signal: A digital signal is a signal that is being used to represent data as a sequence of discrete values.
- Data transmission: Data transmission, digital transmission, or digital communications is the physical transfer of data over a point-to-point or point-to-multipoint communication channel.
- Network topology: Network topology is the arrangement of the elements (links, nodes, etc.) of a communication network.
- Modulation: In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal that contains information to be transmitted.
External links
- Medical encyclopedia article on Telecommunications
- Wikipedia's article - Telecommunications
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