Telecommunications terms starting with A

604 terms

  1. Agent Agent means any individual, other than a broker-dealer, who represents a broker-dealer or issuer in effecting or attempting to effect purchases or sales…
  2. aggregation A ground for rejection of a patent claim that is based on a lack of cooperation among the elements of an invention. MPEP 2173.05(k).
  3. aggregator Any entity that, in the ordinary course of its operations, makes telephones available to the public or to transient users of its premises, for interstate…
  4. Aging Numbers: Aging numbers are disconnected numbers that are not available for assignment to another end user or customer for a specified period of time.
  5. Agreements, Standards, Policies and Regulations (ASPR) A term used to refer to the complete set of inter-entity arrangements that are necessary for communications services; these arrangements include national…
  6. AI Abbreviation for artificial insemination.
  7. AIM Air Intercept Missile
  8. AIN Abbreviation for advanced intelligent network.
  9. AIOD Abbreviation for automatic identified outward dialing.
  10. AIOD leads Terminal equipment leads used solely to transmit automatic identified outward dialing (AIOD) data from a PBX to the public switched telephone network or…
  11. Air Conditioning The control of the quality, quantity, and temperature-humidity of the air in an interior space.
  12. air portable Denotes materiel that is suitable for transport by an aircraft loaded internally or externally, with no more than minor dismantling and reassembling…
  13. air sounding Measuring atmospheric phenomena or determining atmospheric conditions, especially by means of apparatus carried by balloons, rockets, or satellites.
  14. air terminal In grounding systems, the lightning rod or conductor placed on or above a building, structure, or external conductors for the purpose of intercepting…
  15. air-floating head Synonym floating head.
  16. air-ground radiotelephone service A radio service in which common carriers are authorized to offer and provide radio telecommunications service for hire to subscribers in aircraft. [47CFR]
  17. air-ground worldwide communications system A worldwide military network of ground stations that (a) provides two-way communications links between aircraft and ground stations for navigation and…
  18. air-spaced coaxial cable A coaxial cable in which air is the primary dielectric (insulator) between the inner and outer conductors.
  19. airborne radio relay Airborne equipment used to relay radio transmission from selected originating transmitters. [JP1] 2.
  20. aircraft Earth station A mobile Earth station in the aeronautical mobile-satellite service located on board an aircraft. [NTIA] [RR]
  21. aircraft emergency frequency An international aeronautical emergency frequency, such as 121.5 MHz (civil) and 243.
  22. aircraft station A mobile station in the aeronautical mobile service, other than a survival craft station, located on board an aircraft. [RR]
  23. airdrome control station An aeronautical station providing communication between an airdrome control tower and aircraft. [NTIA] Synonym airport control station.
  24. airport control station Synonym airdrome control station.
  25. AIS automated information system
  26. alarm Alert, Locate, and Report Missiles.
  27. alarm center A location that receives local and remote alarms. Note: An alarm center is usually in a technical control facility.
  28. alarm event An instantaneous occurrence that changes at least one of the attributes of the alarm status of an object.
  29. alarm indication signal (AIS) A signal transmitted in lieu of the normal signal to maintain transmission continuity and to indicate to the receiving equipment that there is a…
  30. alarm indicator A device that responds to a signal from an alarm sensor. Note: Examples of alarm indicators include bells, lamps, horns, gongs, and buzzers.
  31. alarm sensor In communications systems, any device that (a) can sense an abnormal condition within the system and provide a signal indicating the presence or nature of…
  32. alarm status A set of attributes that describes the alarms currently defined for an object, for example, perceived severity, alarm state, etc.
  33. alarm surveillance A set of functions that enables the monitoring or interrogation (or both) of the telecommunications network concerning alarm-related events or conditions.
  34. ALE Airborne Laser Experiment.
  35. alerting signal A signal used by the network to indicate the presence of an incoming call. It consists of a ringing signal periodically interrupted by silent (no ringing…
  36. algorithm identifier In encryption, a unique identifier or recognizer for a given encryption or hash algorithm, together with any required parameters. [After X9.31-1]
  37. algorithmic language An artificial language established for expressing a given class of algorithms.
  38. alias Called by another name.
  39. alias point code A Signaling System No. 7 (SS7) address that is shared by more than one system supporting the same GTT (global title translation) function (or other SS7…
  40. ALIASING When computer graphics output has jagged edges or a stair-stepped, rather than a smooth, appearance when magnified.
  41. aligned bundle A bundle of optical fibers in which the relative spatial coordinates of each fiber are the same at the two ends of the bundle.
  42. alignment error rate monitoring A procedure by which the error rate of a signaling link is measured during the initial alignment process. [After T1.110.2-1992] [After T1.226-1992]
  43. alignment jitter The short-term variations between the optimum sampling instants of a digital signal and the sampling clock derived from it. [T1.Rpt17-1993]
  44. all trunks busy (ATB) An equipment condition in which all trunks (paths) in a given trunk group are busy.
  45. all-glass fiber Synonym all-silica fiber.
  46. all-silica fiber An optical fiber composed of a silica-based core and cladding. Note: The presence of a protective polymer overcoat does not disqualify a fiber as an…
  47. Allan variance One half of the time average over the sum of the squares of the differences between successive readings of the frequency deviation sampled over the…
  48. allcall In adaptive high-frequency (HF) radio automatic link establishment (ALE), a general broadcast that does not request responses and does not designate any…
  49. allocation (of a frequency band) Entry in the Table of Frequency Allocations of a given frequency band for the purpose of its use by one or more (terrestrial or space) radiocommunication…
  50. allotment (of a radio frequency or radio frequency channel) Entry of a designated frequency channel in an agreed plan, adopted by a component Conference, for use by one or more administrations for a (terrestrial or…
  51. alpha profile See power-law index profile.
  52. alphabet An ordered set of all the letters used in a language, including letters with diacritical signs where appropriate, but not including punctuation marks. 2.
  53. alphabet translation Deprecated synonym for alphabet transliteration. See alphabet transliteration.
  54. alphabet transliteration The substitution of the characters of one alphabet for the corresponding characters of a different alphabet, usually accomplished on a…
  55. alphabetic character set A character set that contains letters and may contain control characters, special characters, and the yyspace character, but not digits.
  56. alphabetic code A code according to which data are represented through the use of an alphabetic character set.
  57. alphabetic string A string consisting solely of letters from the same alphabet. 2. A character string consisting solely of letters and associated special characters from…
  58. alphabetic word A word consisting solely of letters from the same alphabet. 2. A word that consists of letters and associated special characters, but not digits.
  59. alphanumeric Characters composed of letters, numbers (and sometimes punctuation marks). Excludes control characters.
  60. alphanumeric character set A character set that contains both letters and digits, special characters, and the yyspace character.
  61. alphanumeric code A code derived from an alphanumeric character set. 2. A code that, when used, results in a code set that consists of alphanumeric characters.
  62. alphanumeric data Data represented by letters, digits, and sometimes by special characters and the yyspace character.
  63. altazimuth mount A mounting, e.g., for a directional antenna, in which slewing takes place in (a) the plane tangent to the surface of the Earth or other frame of reference…
  64. Alteration Any change involving an erasure or rewriting in the date, amount, or payee of a check or other negotiable instrument.
  65. alternate access provider A company that enters a market area as a competitive service provider (CAP) to provide exchange service in competition with one or more existing exchange…
  66. alternate carrier routing (ACR) A special advanced intelligent network (AIN) feature supporting Government Emergency Telecommunications Service (GETS) calls.
  67. alternate mark inversion (AMI) signal A pseudoternary signal, representing binary digits, in which (a) successive "marks" are of alternately positive and negative polarity and the absolute…
  68. alternate party In multilevel precedence and preemption, the call receiver, i.e., the destination user, to which a precedence call will be diverted.
  69. alternate route A second or subsequent choice path between two points. [T1.Rpt24-1993]
  70. alternate routing The routing of a call or message over a substitute route when a primary route is unavailable for immediate use. 2.
  71. alternating mode Synonym half-duplex (HDX) operation.
  72. alternative routing In signaling, the process of allocating substitute routes for a given signaling traffic stream in case of failure(s) affecting the signaling links or…
  73. altitude of the apogee or of the perigee The altitude of the apogee or perigee above a specified reference surface serving to represent the surface of the Earth.
  74. ALU Arithmetic Logic Unit.
  75. AM area manager.
  76. AMA adaptive management area.
  77. amateur service A radiocommunication service for the purpose of self-training, intercommunication and technical investigation carried out by amateurs, that is, by duly…
  78. amateur station A station in the amateur service. [NTIA] [RR]
  79. amateur-satellite service A radiocommunication service using space stations on Earth satellites for the same purposes as those of the amateur service. [NTIA] [RR]
  80. ambient noise level The level of acoustic noise existing at a given location, such as in a room, in a compartment, or at a place out of doors.
  81. Ambient Temperature The temperature of a medium, such as gas or liquid, which comes into contact with or surrounds an apparatus or building element.
  82. AME Abbreviation for amplitude modulation equivalent, automatic message exchange. See compatible sideband transmission.
  83. American National Standards Institute (ANSI) A national coordinator of voluntary standards activities, and an approval organization and clearinghouse for consensus standards in the United States.
  84. American Standard Code for Information Interchange (ASCII) A set of codes for representing alphanumeric information (e.g., a byte with a value of 77 represents a capital M).
  85. AMI Abbreviation for alternate mark inversion. See alternate mark inversion signal.
  86. AMI violation A "mark" that has the same polarity as the previous "mark" in the transmission of alternate mark inversion (AMI) signals.
  87. Amplifier A device used to increase the strength of an analog signal
  88. amplitude compression 1. See signal compression. 2. In video production, the imposition of a nonlinear transfer function on (i.e.
  89. amplitude distortion Distortion occurring in a system, subsystem, or device when the output amplitude is not a linear function of the input amplitude under specified…
  90. amplitude equalizer A corrective network that is designed to modify the amplitude characteristics of a circuit or system over a desired frequency range.
  91. amplitude hit See hit.
  92. amplitude intensity modulation (AIM) Deprecated term. See intensity modulation.
  93. amplitude keying Keying in which the amplitude of a signal is varied among the members of a set of discrete values.
  94. amplitude modulation (AM) Modulation in which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal.
  95. amplitude modulation equivalent (AME) Synonym compatible sideband transmission.
  96. amplitude-vs.-frequency distortion Distortion in a transmission system caused by nonuniform attenuation, or gain, in the system with respect to frequency under specified operating…
  97. AMPS Abbreviation for automatic message processing system.
  98. AMTS Abbreviation for automated maritime telecommunications system.
  99. analog In chemistry, a substance that is similar, but not identical, to another.
  100. analog component Synonym CAV.