Telecommunications terms starting with C

924 terms

  1. C-band Loosely, the group of microwave frequencies from 4 GHz to 6 GHz used in satellite communications. 2. The band of satellite downlink frequencies between 3.
  2. C-E Abbreviation for communications-electronics.
  3. C-language A general-purpose, high-level, structured computer programming language. Note: C-language was originally designed for and implemented on the UNIX™…
  4. C-Message Noise The term "C-Message Noise" denotes the frequency weighted average noise within an idle voice channel.
  5. C-message weighting A noise spectral weighting used in a noise power measuring set to measure noise power on a line that is terminated by a 500-type set or similar instrument.
  6. C-Notched Noise The term "C-Notched Noise" denotes the C-message frequency weighted noise on a voice channel with a holding tone, which is removed at the measuring end…
  7. C.O. Abbreviation for central office.
  8. C2W Abbreviation for command and control warfare.
  9. cable An assembly of one or more insulated conductors, or optical fibers, or a combination of both, within an enveloping jacket.
  10. cable assembly A cable that is ready for installation in specific applications and usually terminated with connectors.
  11. cable cutoff wavelength (λcc) For a cabled single-mode optical fiber under specified length, bend, and deployment conditions, the wavelength at which the fiber's second order mode is…
  12. cable fill factor The ratio of cable conductor or cable pair kilometers in use to total cable conductor or cable pair kilometers available in the plant, e.g.
  13. cable headend Synonym [in cable television] headend.
  14. cable jacket See sheath.
  15. cable modem In CATV systems, a bidirectional high-speed digital communications interface, located on a subscriber's or user's premises, and used, for example, for…
  16. cable television relay service (CARS) station A fixed or mobile station used for the transmission of television and related audio signals, signals of standard and FM broadcast stations, signals of…
  17. cable TV (CATV) A broadband communications technology in which multiple television channels, as well as audio and data signals, may be transmitted either one way or…
  18. cache memory A buffer, smaller and faster than main storage, used to hold a copy of instructions and data in main storage that are likely to be needed next by the…
  19. CAD Coronary artery disease. A disease in which there is a narrowing or blockage of the coronary arteries (blood vessels that carry blood and oxygen to the…
  20. Call In the bond markets, a call is an issuer's right to redeem bonds it has sold before the date they mature.
  21. call abandoned See abandoned call.
  22. call acceptance The mechanism that allows a user to be alerted on one terminal and to choose to answer the call on any terminal, not necessarily the one through which…
  23. call accepted signal A call control signal sent by the called terminal to indicate that it accepts the incoming call.
  24. Call Agent The Call Agent provides call processing, call control, feature control and Operations Administration Maintenance & Provisioning to manage services for a…
  25. call associated signaling (CAS) Signaling required for supervision of a bearer service between two end points, including support for the functions of call origination, call delivery, and…
  26. call attempt In a telecommunications system, a demand by a user for a connection to another user.
  27. call back [The] procedure for identifying and authenticating a remote information-systems (IS) terminal, whereby the host system disconnects the terminal and…
  28. call collision The contention that occurs when a terminal and data circuit-terminating equipment (DCE) specify the same channel at the same time to transfer a call…
  29. call completion rate The ratio of successfully completed calls to the total number of attempted calls.
  30. call control character One of a set of control characters used in call-control signaling. Note: The signals representing call control characters may be used under defined…
  31. call control function (CCF) The network intelligence that provides call/connection processing and control. [T1.667-1999]
  32. call control signal A member of the set of network management signals used to establish, maintain, or release a call.
  33. call data channel (CDC) The logical link between the device performing an electronic surveillance access function and the LEA (law enforcement agency) that primarily carries…
  34. call delay The delay that occurs when a call arrives at an automatic switching device and no channel or facility is immediately available to process the call. 2.
  35. call detail recording (CDR) A service feature in which call data on a specific telephone extension or group of subscribers are collected and recorded for cost-of-service accounting…
  36. call duration The time between (a) the instant a connection, i.e., off-hook condition at each end, is established between the call originator and the call receiver and…
  37. call forwarding A service feature, available in some switching systems, whereby calls can be rerouted automatically from one line, i.e.
  38. Call Gap CG is a code control that regulates the maximum rate at which calls are released toward a destination code.
  39. call hold A service feature in which a user may retain an existing call while accepting or originating another call using the same end instrument.
  40. call identifier A network utility that consists of a name assigned by the originating network for each established or partially established virtual call.
  41. call intensity Synonym traffic intensity.
  42. call management 1. In telegraphy, route selection, signaling, and circuit usage and availability for a call. 2.
  43. call originator An entity, such as a person, equipment, or program that originates a call. Synonym calling party.
  44. call pickup A service feature of some switching systems enabling a user, by dialing a predetermined code, to answer incoming calls that are directed to another user…
  45. call processing The sequence of operations performed by a switching system from the acceptance of an incoming call through the final disposition of the call. 2.
  46. call progress signal A call control signal transmitted by the called data circuit-terminating equipment (DCE) to the calling data terminal equipment (DTE) to report (a) the…
  47. call progress tone An audible signal returned by a network to a call originator to indicate the status of a call.
  48. call receiver An entity, such as a person, equipment, or program to which a call is directed. Synonym called party.
  49. call record Recorded data pertaining to a single call.
  50. call release time In communication systems, the time interval from initiation of a clearing signal by a terminal until the available-line condition appears on originating…
  51. call restriction A switching system service feature that prevents selected terminals from exercising one or more service features otherwise available from the switching…
  52. call segment A specific portion of the processing of a call. [T1.667-1999]
  53. call set-up error probability The ratio of total call attempts that result in call set-up error to the total call attempts in a population of interest. [T1.504-1989]
  54. call set-up failure probability The ratio of total call attempts that result in call set-up failure to the total call attempts in a population of interest. [T1.504-1989]
  55. call set-up time 1. The overall length of time required to establish a circuit-switched call between users. 2.
  56. call sign A station or address designator represented by a combination of characters or pronounceable words that is used to identify such entities as a…
  57. call spill-over In common-channel signaling, the effect on a traffic circuit of the arrival at a switching center of an abnormally delayed call control signal relating to…
  58. call splitting A switching system service feature that allows a switch attendant to talk privately in either direction on an established call.
  59. Call Through Test The call through test confirms capabilities of the interface relative to an actual or simulated call: Basic call set-up; sequential, acknowledged…
  60. call tracing A procedure that permits an entitled user to be informed about the routing of data for an established connection, identifying the entire route from the…
  61. call transfer A switching system service feature that allows the calling or called user to instruct the local switching equipment or switch attendant to transfer an…
  62. call waiting In telephony, a service feature that provides an indication to a terminal already engaged in an established call that one or more calls are awaiting…
  63. call-failure signal A signal sent in the backward direction indicating that a call cannot be completed because of a time-out, a fault, or a condition that does not correspond…
  64. call-not-accepted signal A call control signal sent by the called terminal to indicate that it does not accept the incoming call.
  65. call-processing state A call state during which the network establishes a communications path between the caller and the public safety answering point (PSAP) customer…
  66. call-request time In the establishment of a connection or in the call setup, i.e., placement of a call, the time from the initiation of a calling signal to the receipt of a…
  67. call-second A unit used to measure communications traffic. Note 1: A call-second is equivalent to 1 call 1 second long.
  68. call-selection time In the establishment of a connection or the placement of a call, the time from the receipt by the call originator of a proceed-to-select signal (dial…
  69. call-sign allocation plan The table of allocation of international call sign series contained in the current edition of the International Telecommunication Union (ITU) Radio…
  70. called party Synonym call receiver.
  71. called-line identification facility A network-provided service feature in which the network notifies a calling terminal of the address to which the call has been connected.
  72. called-line identification signal A sequence of characters transmitted to the calling terminal to permit identification of the called line.
  73. called-party camp-on A communication system service feature that enables the system to complete an access attempt in spite of issuance of a user blocking signal.
  74. caller ID A network service feature that permits the recipient of an incoming call to determine, even before answering, the number from which the incoming call is…
  75. caller identification See caller ID.
  76. caller's emergency service identification (CESID) The number used to identify the calling terminal within the context of the emergency service call. [T1.414-1998]
  77. calling frequency A radio frequency that a station uses to call another station.
  78. calling line identification (CLI) At a minimum, the calling line identification includes a single calling party number; it may also include a second calling party number, a calling party…
  79. calling party Synonym call originator.
  80. calling party number (CPN) A set of digits and related indicators (type of number, numbering, plan identification, screening indicator, presentation indicator) that provide…
  81. calling party pays A billing method in which a wireless phone caller pays only for making calls and not for receiving them.
  82. calling rate The number of telephone calls originated during a specified time interval such as one hour.
  83. calling sequence A sequence of instructions together with any associated data necessary to perform a call.
  84. calling signal A call control signal transmitted over a circuit to indicate that a connection is desired.
  85. calling-line identification facility A network-provided service feature in which the network notifies a called terminal of the address from which the call has originated.
  86. calling-line identification signal A sequence of characters transmitted to the called terminal to permit identification of the calling line.
  87. calling-party camp-on A service feature that enables the system to complete an access attempt in spite of temporary unavailability of system transmission or switching…
  88. calls-barred facility A service feature that permits a terminal either to make outgoing calls or to receive incoming calls, but not both.
  89. CAMA Acronym for centralized automatic message accounting.
  90. camcorder A combination of camera and video tape recorder in one device. Note: Camcorders permit easy and rapid photography and recording simultaneously.
  91. camp-on See automatic callback, called-party camp-on, queue traffic.
  92. camp-on busy signal A signal that informs a busy telephone user that another call originator is waiting for a connection. 2.
  93. camp-on-with-recall A camp-on with the release of the call-originator terminal until the called-receiver terminal becomes free.
  94. CAN Abbreviation for cancel character.
  95. Canadian Standards Association (CSA) An independent, nongovernment, not-for-profit association for the development, by consensus, of Canadian standards and product certification.
  96. cancel character (CAN) A control character used by some conventions to indicate that the data with which it is associated are in error or are to be disregarded. 2.
  97. Cancel To CANT is a trunk group control that allows traffic to be canceled before hunting for a circuit to a destination.
  98. Candela The luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant…
  99. canonical name A domain name of an Internet resource indicating its type or its capabilities. Note: One Internet resource may have a set of different domain names, one…
  100. Capability The maximum load that a generating unit, power plant, or other electrical apparatus can carry under specified conditions for a given period of time…