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optical telephone

См. также в других словарях:

  • 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

  • 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 character recognition — Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine encoded text. It is widely used to convert books and documents into… …   Wikipedia

  • Optical fiber composite overhead ground wire — (OPGW) is a type of cable that is used in the construction of electric power transmission and distribution lines. Such cable combines the functions of grounding and communications. An OPGW cable contains a tubular structure with one or more… …   Wikipedia

  • optical fiber — n. (Communications) A thin fiber of very pure glass used to carry signals transmitted by means of light. It has much greater information carrying capacity than a copper wire, and in the 1990 s became a dominant means of transmitting telephone… …   The Collaborative International Dictionary of English

  • Telephone exchange — Tel e*phone ex*change A central office in which the wires of telephones from local subscribers may be connected by switches to other local telephones or to long distance lines, to permit transmission of conversation or data. Note: In the late… …   The Collaborative International Dictionary of English

  • optical fiber — noun count or uncount a very thin string made from a special type of glass and used in telephone and computer systems for sending information in the form of light …   Usage of the words and phrases in modern English

  • telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… …   Universalium

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

  • Telephone card — A telephone card, calling card or phone card for short, is a small card, usually resembling a credit card, used to pay for telephone services. Such cards can either employ prepaid credit system or credit card style system of credit. The exact… …   Wikipedia

  • Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… …   Wikipedia

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