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physical communications channel

См. также в других словарях:

  • Channel (communications) — Old telephone wires are a challenging communications channel for modern digital communications. In telecommunications and computer networking, a communication channel, or channel, refers either to a physical transmission medium such as a wire, or …   Wikipedia

  • Channel 1 (North American TV) — In North America, channel 1 is a former broadcast (over the air) television channel. During the experimental era of TV operation Channel 1 moved around the lower VHF spectrum, swapping places with an early allocation for the FM broadcast band.… …   Wikipedia

  • Channel access method — In telecommunications and computer networks, a channel access method or multiple access method allows several terminals connected to the same multi point transmission medium to transmit over it and to share its capacity. Examples of shared… …   Wikipedia

  • Communications in Israel — Cellular network antennas in Israel The Communications system in Israel is the most developed in the Middle East, although it is not the biggest. Israel s system consists of Coaxial cables, Optical fibers, and Microwave radio relay …   Wikipedia

  • Communications protocol — For other senses of this word, see Protocol. A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications. A protocol may have a formal… …   Wikipedia

  • Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …   Universalium

  • Channel code — In digital communications, a channel code is a broadly used term mostly referring to the forward error correction code and bit interleaving in communication and storage where the communication media or storage media is viewed as a channel. The… …   Wikipedia

  • Channel 1 — In North America, channel 1 is a former broadcast (over the air) television channel (44–50 MHz, with visual at 45.25 and aural at 49.75). History When the U.S. Federal Communications Commission initially allocated broadcast television frequencies …   Wikipedia

  • Physical layer — PHY redirects here. For the drug referred to as Phy, see Methadone. The OSI model 7 Application layer 6 Presentation layer 5 Session layer 4 Transport layer 3 …   Wikipedia

  • Physical Layer — NOTOC The Physical Layer is the first level in the seven layer OSI model of computer networking. It translates communications requests from the Data Link Layer into hardware specific operations to affect transmission or reception of electronic… …   Wikipedia

  • channel —    1. In communications, any connecting path that carries information from a sending device to a receiving device. A channel may refer to a physical medium (for example, a coaxial cable) or to a specific frequency within a larger channel.    2.… …   Dictionary of networking

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