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  2. Telecommunications - Wikipedia

    en.wikipedia.org/wiki/Telecommunications

    Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information with an immediacy comparable to face-to-face communication. As such, slow communications technologies like postal mailand pneumatic tubesare excluded from the definition. [1][2]Many transmission mediahave been used for telecommunications throughout history, from smoke signals, beacons ...

  3. Telecommunications network - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_network

    A telecommunications network is a group of nodes interconnected by telecommunications links that are used to exchange messages between the nodes. The links may use a variety of technologies based on the methodologies of circuit switching, message switching, or packet switching, to pass messages and signals.

  4. Communications system - Wikipedia

    en.wikipedia.org/wiki/Communications_system

    A communications system or communication system is a collection of individual telecommunications networks systems, relay stations, tributary stations, and terminal equipment usually capable of interconnection and interoperation to form an integrated whole. The components of a communications system serve a common purpose, are technically ...

  5. Telecommunications industry - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_industry

    The telecommunications industries within the sector of information and communication technology is made up of all telecommunications / telephone companies and internet service providers and plays a crucial role in the evolution of mobile communications and the information society . Traditional telephone calls continue to be the industry's ...

  6. Information and communications technology - Wikipedia

    en.wikipedia.org/wiki/Information_and...

    Information and communications technology ( ICT) is an extensional term for information technology (IT) that stresses the role of unified communications [1] and the integration of telecommunications ( telephone lines and wireless signals) and computers, as well as necessary enterprise software, middleware, storage and audiovisual, that enable users to access, store, transmit, understand and ...

  7. Public switched telephone network - Wikipedia

    en.wikipedia.org/wiki/Public_switched_telephone...

    Public switched telephone network. The public switched telephone network ( PSTN) is the aggregate of the world's telephone networks that are operated by national, regional, or local telephony operators. It provides infrastructure and services for public telephony. The PSTN consists of telephone lines, fiber-optic cables, microwave transmission ...

  8. Telecommunications equipment - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_equipment

    Telecommunications equipment (also telecoms equipment or communications equipment) is a type of hardware which is used for the purposes of telecommunications. Since the 1990s the boundary between telecoms equipment and IT hardware has become blurred as a result of the growth of the internet and its increasing role in the transfer of telecoms ...

  9. Telephone network - Wikipedia

    en.wikipedia.org/wiki/Telephone_network

    A telephone network is a telecommunications network that connects telephones, which allows telephone calls between two or more parties, as well as newer features such as fax and internet. The idea was revolutionized in the 1920s, as more and more people purchased telephones and used them to communicate news, ideas, and personal information. [1] During the 1990s, it was further revolutionized ...