- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A routine or storage medium used to compensate for a difference in rate of flow of data, or time of occurrence of events, when transferring data from one device to another. Note: Buffers are used for many purposes, such as (a) interconnecting two digital circuits operating at different rates, (b) holding data for use at a later time, (c) allowing timing corrections to be made on a data stream, (d) collecting binary data bits into groups that can then be operated on as a unit, (e) delaying the transit time of a signal in order to allow other operations to occur. 2. To use a buffer or buffers. 3. An isolating circuit, often an amplifier, used to minimize the influence of a driven circuit on the driving circuit. Synonym buffer amplifier. 4. In a fiber optic communication cable, one type of component used to encapsulate one or more optical fibers for the purpose of providing such functions as mechanical isolation, protection from physical damage and fiber identification. Note: The buffer may take the form of a miniature conduit, contained within the cable and called a loose buffer, or loose buffer tube, in which one or more fibers may be enclosed, often with a lubricating gel. A tight buffer consists of a polymer coating in intimate contact with the primary coating applied to the fiber during manufacture.
Industry:Telecommunications
A routing address that (a) is used to address simultaneously all the computers in a group and (b) usually identifies a group of computers that share a common protocol, as opposed to a group of computers that share a common network. Note: Multicast address also applies to radio communications. Synonym (in Internet protocol) class d address.
Industry:Telecommunications
A rule defining the approximate bandwidth requirements of communications system components for a carrier signal that is frequency modulated by a continuous or broad spectrum of frequencies rather than a single frequency. Note 1: The Carson bandwidth rule is expressed by the relation CBR = 2 (f + fm) where CBR is the bandwidth requirement, f is the carrier peak deviation frequency, and fm is the highest modulating frequency. Note 2: The Carson bandwidth rule is often applied to transmitters, antennas, optical sources, receivers, photodetectors, and other communications system components.
Industry:Telecommunications
A rule stating that if the thumb of the right hand points in the direction of an electric current, then the curled fingers point in the direction of the magnetic field that encircles the current; and further, if the curled fingers of the right hand describe the electric current in a solenoid, then the thumb points in the direction of the magnetic field inside the solenoid. Synonym right-hand rule.
Industry:Telecommunications
A rule stating that if the thumb of the right hand points in the direction of an electric current, then the curled fingers point in the direction of the magnetic field that encircles the current; and further, if the curled fingers of the right hand describe the electric current in a solenoid, then the thumb points in the direction of the magnetic field inside the solenoid. Synonym right-hand rule.
Industry:Telecommunications
A satellite carrying a station intended to transmit or retransmit radio communication signals. Note: An active satellite may perform signal processing functions such as amplification, regeneration, frequency translation, and link switching, to make the signals suitable for retransmission. 2. An Earth satellite carrying a station intended to transmit or re-transmit radiocommunication signals.
Industry:Telecommunications
A satellite system or a part of a satellite system, consisting of only one satellite and the cooperating Earth stations. 2. A satellite system, or part of a satellite system, and the cooperating Earth stations.
Industry:Telecommunications
A satellite-based direct-broadcast radio service in which digitally encoded audio entertainment material is broadcast to Earth-based receivers, either directly from an orbiting satellite, or--in cases in which the receiver is in a shielded location--from the satellite to the receiver via a repeater station. 2. A radiocommunication service in which audio programming is digitally transmitted by one or more space stations directly to fixed, mobile, and/or portable stations, and which may involve complementary repeating terrestrial transmitters, telemetry, tracking and control facilities. 3. A radiocommunication service in which compact-disc quality programming is digitally transmitted by one or more space stations.
Industry:Telecommunications
