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optical telegraph

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  • 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

  • Telegraph (disambiguation) — Telegraph may be:Telegraphy, class of means of long distance communication: *Electrical telegraph, a form of telegraph that uses electric signals *Optical telegraph, a semaphore based system *Hydraulic telegraph, a telegraph based on seeing how… …   Wikipedia

  • Telegraph hill — A telegraph hill is a hill or other natural elevation, chosen as part of an optical telegraph system because of the relatively great distance between it and at least one other point, which it may observe or be observed from. In the 18th and 19th… …   Wikipedia

  • Optical mark recognition — (also called Optical Mark Reading and OMR) is the process of capturing human marked data from document forms such as surveys and tests. Contents 1 OMR background 2 OMR software 2.1 Open Source …   Wikipedia

  • Optical wireless — is the combined use of optical (optical fibre) and wireless (radio frequency) communication to provide telecommunication to clusters of end points which are geographically distant. The high capacity optical fibre is used to span the longest… …   Wikipedia

  • Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …   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

  • Optical Transport Network — ITU T defines an Optical Transport Network (OTN) as a set of Optical Network Elements (ONE) connected by optical fibre links, able to provide functionality of transport, multiplexing, switching, management, supervision and survivability of… …   Wikipedia

  • Free space optical communication — In telecommunications, Free Space Optics (FSO) is an optical communication technology that uses light propagating in free space to transmit data between two points. The technology is useful where the physical connection by the means of fibre… …   Wikipedia

  • Optischer Telegraph — Telegrafenstation Nr. 50 in Köln Flittard Der Preußische optische Telegraf war ein zwischen den Jahren 1832 und 1849 bestehendes telegrafisches Kommunikationssystem zwischen Berlin und der Rheinprovinz, das behördliche und militärische… …   Deutsch Wikipedia

  • Preußischer optischer Telegraph — Telegrafenstation Nr. 50 in Köln Flittard Der Preußische optische Telegraf war ein zwischen den Jahren 1832 und 1849 bestehendes telegrafisches Kommunikationssystem zwischen Berlin und der Rheinprovinz, das behördliche und militärische… …   Deutsch Wikipedia

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