Telecommunications terms starting with C

924 terms

coding Litigation Support: Automated or human process through which documents are examined and evaluated using predetermined codes, and the results of those…
coding scheme Synonym code.
codress message In military communications systems, a message in which the entire address is encrypted with the message text.
COG Abbreviation for centralized ordering group.
coherence area Pertaining to an electromagnetic wave, the area of a surface perpendicular to the direction of propagation, over which the electromagnetic wave maintains…
coherence degree See degree of coherence.
coherence length The propagation distance from a coherent source to a point where an electromagnetic wave maintains a specified degree of coherence.
coherence time For an electromagnetic wave, the time over which a propagating wave may be considered coherent.
coherent Pertaining to a fixed phase relationship between corresponding points on an electromagnetic wave.
coherent bundle Synonym aligned bundle.
coherent differential phase-shift keying (CDPSK) Phase-shift keying (a) that is used for digital transmission, (b) in which the phase of the carrier is discretely modulated in relation to the phase of a…
coherent pulse operation In pulsed carrier transmission, a method of operation in which a fixed phase relationship of the carrier wave is maintained from one pulse to the next.
coherent radiation See coherent.
cold standby Pertaining to spare electronic equipment that is available for substitute use, but is not powered or warmed up and ready for use.
cold start [In security, a] procedure for initially keying crypto-equipment. [INFOSEC-99]
collective address Synonym group address.
collective routing Routing in which a switching center automatically delivers messages to a specified list of destinations.
collimation The process by which a divergent or convergent beam of electromagnetic radiation is converted into a beam with the minimum divergence or convergence…
collimator A device that renders divergent or convergent rays more nearly parallel. Note: The degree of collimation (parallelism) should be stated.
collinear antenna array An array of dipole antennas mounted in such a manner that every element of each antenna is in an extension, with respect to its long axis, of its…
Collision This benefit pays to repair damage to your car as a result of an accident. Most banks or lenders require you to buy this coverage to receive a car loan.
color balancing In color television technology, a calibration process involving adjustment of the relative amplitudes of the signal levels representing the tristimulus…
color bar test signal The color bar test signal shown in the associated figure, consists of discrete steps of chroma and luminance levels that produce eight different colors…
color bars 1. In color television technology, any of several electronically generated video test patterns displayed as vertical bars of usually equal width, and of…
color burst In analog color television technology, a signal consisting of several (8 to 10 in NTSC) cycles of unmodulated color subcarrier, superimposed at a…
color coordinate transformation Computation of the tristimulus values of colors in terms of one set of primaries.
color correction In television and computer graphics, the electronic adjustment of a color reproduction process to improve the perceived-color conformity of the…
color decoder In color television technology, of a receiver, the circuitry that separates the chroma information from the video (gray-scale) information and processes…
color errors In video systems, distortion of hues in all or a portion of the received image.
color keying Synonym chroma keying.
color phase In color television technology, the instantaneous phase of the chroma signal with respect to that of the color burst signal.
color processing In color television technology, electronic alteration of the color information content to effect a change in the color balance of the video signal.
color subcarrier In analog color television technology, a signal superimposed upon the picture (gray scale) information for the purpose of conveying the associated color…
Color Temperature The color of the light source. By convention, yellow-red colors (like the flames of a fire) are considered warm, and blue-green colors (like light from an…
color-difference signal The chrominance vectors carrying the color information in a composite format. Note: The color-difference signals have been defined by the ITU-R for…
color-matching functions The tristimulus values corresponding to monochromatic stimuli of equal radiant power.
colorimetry Measurement of colors based on a set of conventions. [After SMPTE] 2. The science of, or body of techniques employed in, (a) the measurement or…
combat-net radio (CNR) A radio operating in a network that (a) provides a half-duplex circuit and (b) uses either a single radio frequency or a discrete set of radio frequencies…
combinational logic element A device having at least one output channel and one or more input channels, all characterized by discrete states, such that at any instant the state of…
combined communications The common use of communications facilities by two or more military services, each belonging to a different nation.
combined distribution frame (CDF) A distribution frame that combines the functions of main and intermediate distribution frames and contains both vertical and horizontal terminating blocks.
combined link set A load-sharing collection of more than one link set to the same message destination. [T1.226-1992]
combined station In high-level data-link control (HDLC) operation, the station that is usually responsible for performing balanced link-level operations and that generates…
combiner See maximal-ratio combiner.
COMINT Communications Intelligence.
comm center Synonym communications center.
comma-free code A code constructed so that any partial code word, beginning at the start of a code word but terminating prior to the end of that code word, is not a valid…
command For command-oriented functions, the authorization required to perform command operations. 55
command and control (C2) The exercise of authority and direction by a properly designated commander over assigned forces in the accomplishment of the mission.
command and control (C2) system The facilities, equipment, communications, procedures, and personnel essential to a commander for planning, directing, and controlling operations of…
command and control warfare (C2W) The integrated use of operations security (OPSEC), military deception, psychological operations (PSYOP), electronic warfare (EW), and physical…
command frame In data transmission, a frame, containing a command, transmitted by a primary station.
command line The form or point of interface, usually indicated by a command prompt, on some operating systems in which a command is entered. [Bahorsky] 2.
command menu A list of all the different commands that may be given to a computer or communications system by an operator.
Command Net A communications network, which connects an echelon of command with some or all of its subordinate echelons for the purpose of command control.
command protocol data unit A protocol data unit (PDU) transmitted by a logical link control (LLC) sublayer in which the PDU command/response (C/R) bit is equal to "0".
command, control and communications (C3) The capabilities required by commanders to exercise command and control of their forces. [JCS Pub 18, Operations Security, Dec. 1982.]
command, control, communications, and computer systems (C4S) Integrated systems of doctrine, procedures, organizational structures, personnel, equipment, facilities, and communications designed to support a…
command, control, communications, computers, and intelligence (C4I) The facilities, computer equipment, communications equipment, display devices, and intelligence systems necessary to support military operations.
commercial carrier Synonym common carrier.
commercial leased access Manner through which independent video producers can access cable capacity for a fee.
commercial licensed evaluation facility Evaluations conducted under UK Information Technology Evaluation and Certification Scheme may only take place in approved evaluation facilities.
commercial refile In military communications systems, the processing of a message from (a) a given military network, such as a tape-relay network, a point-to-point…
commit transaction The application, i.e., insertion, of information into any data repository of an integrated database management system in a distributed local…
common battery A single electrical power source used to energize more than one circuit, component, equipment, or system.
common bonding network (CBN) The set of metallic components that are intentionally or incidentally interconnected to provide the principal means for effecting bonding and grounding…
common carrier In a telecommunications context, a telecommunications company that holds itself out to the public for hire to provide communications transmission services.
common channel network signaling Channels between switching offices used to transmit signaling information independent of the subscribers' communication paths or transmission channels.
common channel signaling network A network consisting of two or more signaling points and connecting common channel signaling links that are administered in common. [T1.110-1987]
common control An automatic switching arrangement in which the control equipment necessary for the establishment of connections is shared by being associated with a…
common control switching arrangement (CCSA) An arrangement in which switching for a private network is provided by one or more common control switching systems.
common control system An automatic switching system that makes use of common equipment to establish a connection.
common equipment Equipment used by more than one system, subsystem, component, or other equipment, such as a channel or switch.
common fill device [In security,] one of a family of devices developed to read-in, transfer, or store key. [INFOSEC-99]
Common Gateway Interface The Common Gateway Interface (CGI) is a standard that allows Web clients to interact with programs on a Web server.
common management information protocol (CMIP) A protocol used by an application process to exchange information and commands for the purpose of managing remote computer and communications resources.
common management information service (CMIS) A service that specifies the service interface to the Common Management Information Protocol (CMIP).
common return A return path that is common to two or more circuits and that serves to return currents to their source or to ground.
common return offset In a line or circuit, the dc potential difference between ground and the common return.
common transport trunk group A trunk group between exchange carrier switches which transports access traffic for numerous interexchange carriers concurrently and may also carry…
common user In communications systems, pertaining to communications facilities and services provided to essentially all users in the area served by the system, rather…
common user circuit A circuit designated to furnish a communication service to a number of users.
common user network A system of circuits or channels allocated to furnish communication paths between switching centers to provide communication service on a common basis to…
common-battery signaling Signaling in which the signaling power of a telephone is supplied by the serving switch.
common-channel interoffice signaling (CCIS) In multichannel switched networks, a method of transmitting all signaling information for a group of trunks by encoding it and transmitting it over a…
common-channel signaling In a multichannel communications system, signaling in which one channel in each link is used for signaling to control, account for, and manage traffic on…
common-mode interference Interference that appears between signal leads, or the terminals of a measuring circuit, and ground. 2.
common-mode rejection ratio (CMRR) The ratio of the common-mode interference voltage at the input of a circuit, to the corresponding interference voltage at the output.
common-mode voltage The voltage common to both input terminals of a device. 2. In a differential amplifier, the unwanted part of the voltage between each input connection…
commonality A quality that applies to materiel or systems: (a) possessing like and interchangeable characteristics enabling each to be utilized, or operated and…
communication configuration An attribute describing the special arrangement for transferring information between two or more access points; it completes the structure associated with…
communication function A function in an open system that provides the means for cooperating processes in different real open systems to communicate.
communication interface That part of the API devoted to communications with other application software, external data transport facilities, and devices.
communications Information transfer, among users or processes, according to agreed conventions. 2.
communications assistant A person who facilitates telephone conversation between text telephone users, users of sign language or individuals with speech disabilities through a…
communications base station Synonym base communications.
communications blackout A cessation of communications or communications capability caused by a lack of power to a communications facility or equipment. 2.
communications center An agency charged with the responsibility for handling and controlling communications traffic.
communications channel See channel.
communications common carrier The term "communications common carrier" as used in this part [of 47CFR] means any person (individual, partnership, association, joint-stock company…