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Switched telegraph communication

См. также в других словарях:

  • switched telegraph communication — perjungiamasis telegrafo ryšys statusas T sritis radioelektronika atitikmenys: angl. switched telegraph communication vok. Vermittlungstelegrafenverkehr, m rus. коммутируемая телеграфная связь, f pranc. liaison télégraphique à commutation, f …   Radioelektronikos terminų žodynas

  • Communication with submarines — is difficult because radio waves do not travel well through thick electrical conductors like salt water. The obvious solution is to surface and raise an antenna above the water, then use ordinary radio transmissions. Early submarines had to… …   Wikipedia

  • telegraph — telegrapher /teuh leg reuh feuhr/; esp. Brit., telegraphist, n. /tel i graf , grahf /, n. 1. an apparatus, system, or process for transmitting messages or signals to a distant place, esp. by means of an electric device consisting essentially of a …   Universalium

  • Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… …   Wikipedia

  • Optical communication — is any form of telecommunication that uses light as the transmission medium. An optical communication system consists of a transmitter, which encodes a message into an optical signal, a channel, which carries the signal to its destination, and a… …   Wikipedia

  • Packet switched network — A Packet Switched Network, or PSN, refers to the packet switched networks that existed before the Internet. The history of such networks can be divided into three eras:early networks before the introduction of X.25 and OSI,the X.25 era when many… …   Wikipedia

  • Nippon Telegraph and Telephone — NTT redirects here. For other uses, see NTT (disambiguation). Nippon Telegraph and Telephone Corporation 日本電信電話株式会社 Type Public Traded as TYO …   Wikipedia

  • Public switched telephone network — The public switched telephone network (PSTN) is the network of the world s public circuit switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites …   Wikipedia

  • Fiber-optic communication — An optical fiber junction box. The yellow cables are single mode fibers; the orange and blue cables are multi mode fibers: 50/125 µm OM2 and 50/125 µm OM3 fibers respectively. Fiber optic communication is a method of transmitting information from …   Wikipedia

  • Open Communication — In business, Open Communication (or Open Access to Communication resources) can be a term used to describe a concept that anyone, on equal conditions with a transparent relation between cost and pricing, can get access to and share communication… …   Wikipedia

  • Drum (communication) — For other kinds of drums, see drum (disambiguation). Developed from hollow tree trunks, and used by cultures living in deforested areas, drums served as an early form of long distance communication, and were used during ceremonial and religious… …   Wikipedia

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