Telecommunication

telecommunicationscommunicationstelecomcommunicationtelecomscommunication technologyCommunications Serviceselectronic communicationelectronic communicationsElectronics and Communication
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.wikipedia
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Multiplexing

multiplexedmultiplexmultiplexes
Such transmission paths are often divided into communication channels which afford the advantages of multiplexing.
In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium.

Transmission (telecommunications)

transmissiontransmissionstransmit
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.
In telecommunications, transmission (abbreviations: TX, Xmit) is the process of sending and propagating an analogue or digital information signal over a physical point-to-point or point-to-multipoint transmission medium, either wired, optical fiber or wireless.

Electrical telegraph

electric telegraphtelegraphtelegraph line
20th- and 21st-century technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites.
It was the first electrical telecommunications system, the most widely used of a number of early messaging systems called telegraphs, devised to send text messages more rapidly than written messages could be sent.

Telephone

phonetelephonesLocal Telephone Service
20th- and 21st-century technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites.
A telephone (derived from the τῆλε, tēle, "far" and φωνή, phōnē, "voice", together meaning "distant voice"), or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.

Radio

radio communicationradio communicationswireless
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. 20th- and 21st-century technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites. A revolution in wireless communication began in the first decade of the 20th century with the pioneering developments in radio communications by Guglielmo Marconi, who won the Nobel Prize in Physics in 1909, and other notable pioneering inventors and developers in the field of electrical and electronic telecommunications.
Radio is the technology of signaling and communicating using radio waves.

Communication

communicationsSocial Communicationcommunicate
Telecommunication occurs when the exchange of information between communication participants includes the use of technology.
Development of civilization has been closely linked with progress in telecommunication.

Fiber-optic communication

fiber-opticfiber optic communicationsfiber-optic network
20th- and 21st-century technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites.
First developed in the 1970s, fiber-optics have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age.

Morse code

MorseInternational Morse CodeMorse-code
His code was an important advance over Wheatstone's signaling method.
Morse code is a character encoding scheme used in telecommunication that encodes text characters as standardized sequences of two different signal durations called dots and dashes or dits and dahs.

Claude Chappe

ChappeChappe brothersChappe Telegraph
In 1792, Claude Chappe, a French engineer, built the first fixed visual telegraphy system (or semaphore line) between Lille and Paris.
This was the first practical telecommunications system of the industrial age, and was used until the 1850s when electric telegraph systems replaced it.

Electronics

electronicelectronic equipmentelectronic device
Although some applications had used earlier technologies such as the spark gap transmitter for radio or mechanical computers for computing, it was the invention of the thermionic vacuum tube that made these technologies widespread and practical, and created the discipline of electronics.
Electronics is widely used in information processing, telecommunication, and signal processing.

Broadband

Broadband Servicesbroad-bandBroadband Internet
The development of transistor technology and the semiconductor industry enabled significant advances in telecommunication technology, and led to a transition away from state-owned narrowband circuit-switched networks to private broadband packet-switched networks.
In telecommunications, broadband is wide bandwidth data transmission which transports multiple signals and traffic types.

Information theory

information-theoreticinformation theoristinformation
There was a rapid growth of the telecommunications industry towards the end of the 20th century, driven by the development of metal-oxide-semiconductor (MOS) large-scale integration (LSI) technology, information theory, digital signal processing, and wireless communications such as cellular networks and mobile telephony.
Information theory studies the quantification, storage, and communication of information.

Samuel Morse

Samuel F. B. MorseSamuel F.B. MorseMorse
These included Charles Wheatstone and Samuel Morse (inventors of the telegraph), Alexander Graham Bell (inventor of the telephone), Edwin Armstrong and Lee de Forest (inventors of radio), as well as Vladimir K. Zworykin, John Logie Baird and Philo Farnsworth (some of the inventors of television).
Heartbroken that for days he was unaware of his wife's failing health and her death, he decided to explore a means of rapid long distance communication.

Edholm's law

According Edholm's law, the bandwidth of telecommunication networks has been doubling every 18 months.
Edholm's law, proposed by and named after Phil Edholm, refers to the observation that the three categories of telecommunication, namely wireless (mobile), nomadic (wireless without mobility) and wired networks (fixed), are in lockstep and gradually converging.

Infrastructure

infrastructuralinfrastructuresurban infrastructure
MOS technology, including MOS integrated circuits and power MOSFETs, drives the communications infrastructure of modern telecommunication.
Infrastructure is composed of public and private physical improvements such as roads, railways, bridges, tunnels, water supply, sewers, electrical grids, and telecommunications (including Internet connectivity and broadband speeds).

Telecommunication circuit

circuitcircuitsconnection
Along with computers, other essential elements of modern telecommunication that are built from MOSFETs include mobile devices, transceivers, base station modules, routers, RF power amplifiers, microprocessors, memory chips, and telecommunication circuits.
A telecommunication circuit is an electrical path in telecommunication used to transmit information.

Digital signal processing

DSPsignal processingdigital
There was a rapid growth of the telecommunications industry towards the end of the 20th century, driven by the development of metal-oxide-semiconductor (MOS) large-scale integration (LSI) technology, information theory, digital signal processing, and wireless communications such as cellular networks and mobile telephony.
DSP applications include audio and speech processing, sonar, radar and other sensor array processing, spectral density estimation, statistical signal processing, digital image processing, data compression, video coding, audio coding, image compression, signal processing for telecommunications, control systems, biomedical engineering, and seismology, among others.

Asynchronous transfer mode

ATMVirtual Path IdentifierVirtual Channel Identifier
However, already in the 1960s, researchers started to investigate packet switching, a technology that sends a message in portions to its destination asynchronously without passing it through a centralized mainframe.
Asynchronous Transfer Mode (ATM) is a telecommunications standard defined by ANSI and ITU (formerly CCITT) standards for carriage of user traffic, including telephony (voice), data, and video signals.

Technology

technologiestechnologicaltechnical
Telecommunication occurs when the exchange of information between communication participants includes the use of technology.
Humans have also been able to explore space with satellites (later used for telecommunication) and in manned missions going all the way to the moon.

Military communications

Signalscommunicationssignal
World War I accelerated the development of radio for military communications.
Present-day military forces of an informational society conduct intense and complicated communicating activities on a daily basis, using modern telecommunications and computing methods.

Pager

pagerspagingbeeper
The wireless revolution began in the 1990s, with the advent of digital wireless networks leading to a social revolution, and a paradigm shift from wired to wireless technology, including the proliferation of commercial wireless technologies such as cell phones, mobile telephony, pagers, wireless computer networks, cellular networks, the wireless Internet, and laptop and handheld computers with wireless connections.
A pager (also known as a beeper) is a wireless telecommunications device that receives and displays alphanumeric or voice messages.

Wireless

wireless communicationwireless communicationswireless internet
There was a rapid growth of the telecommunications industry towards the end of the 20th century, driven by the development of metal-oxide-semiconductor (MOS) large-scale integration (LSI) technology, information theory, digital signal processing, and wireless communications such as cellular networks and mobile telephony. The wireless revolution began in the 1990s, with the advent of digital wireless networks leading to a social revolution, and a paradigm shift from wired to wireless technology, including the proliferation of commercial wireless technologies such as cell phones, mobile telephony, pagers, wireless computer networks, cellular networks, the wireless Internet, and laptop and handheld computers with wireless connections. A revolution in wireless communication began in the first decade of the 20th century with the pioneering developments in radio communications by Guglielmo Marconi, who won the Nobel Prize in Physics in 1909, and other notable pioneering inventors and developers in the field of electrical and electronic telecommunications.
Wireless communication is the transfer of information or power between two or more points that are not connected by an electrical conductor.

Information

informativeinputinputs
Telecommunication occurs when the exchange of information between communication participants includes the use of technology.
These fields deal with those processes and techniques pertaining to information capture (through sensors) and generation (through computation, formulation or composition), processing (including encoding, encryption, compression, packaging), transmission (including all telecommunication methods), presentation (including visualization / display methods), storage (such as magnetic or optical, including holographic methods), etc.

Communications system

communication systemcommunication systemstelecommunications system
In telecommunication, a communications system or communication system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE) usually capable of interconnection and interoperation to form an integrated whole.

Transmitter

radio transmittertransmittersradio transmitters
In electronics and telecommunications a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna.