Telecommunications — page 41 of 85

8,405 terms including subtopics (8,400 terms filed directly here)

Subtopics

Telecommunications terms

  1. Inward Wide-Area Telephone Service (INWATS) See eight-hundred (800) service.
  2. INWATS Acronym for Inward Wide-Area Telephone Service. See eight-hundred (800) service.
  3. IOC (1) Initial Operational Capability. (2) Intelligence Operations Center. (3) Integrated Optics Chip.
  4. IONL Abbreviation for Internal Organization of the Network Layer. The OSI standard for the detailed architecture of the Network Layer.
  5. Ionosphere The region of Earth's atmosphere that extends from about 50 to 300 miles above the surface of the planet and is made up of multiple layers dominated by…
  6. ionosphere sounder A device that transmits signals for the purpose of determining ionospheric conditions. [NTIA] [RR]
  7. ionospheric absorption Absorption occurring as a result of interaction between an electromagnetic wave and free electrons in the ionosphere.
  8. ionospheric disturbance An increase in the ionization of the ionosphere, caused by solar activity, which results in greatly increased radio wave absorption.
  9. ionospheric forward scatter (IFS) Synonym ionospheric scatter.
  10. ionospheric reflection Of electromagnetic waves propagating in the ionosphere, a redirection, i.e., bending--by a complex processing involving reflection and refraction--of the…
  11. ionospheric scatter The propagation of radio waves by scattering as a result of irregularities or discontinuities in the ionization of the ionosphere.
  12. ionospheric sounding A technique that provides real-time data on high-frequency ionospheric-dependent radio propagation, using a basic system consisting of a synchronized…
  13. ionospheric turbulence Ongoing disturbances of the ionosphere that scatter incident electromagnetic waves.
  14. IP Within the peritoneal cavity (the area that contains the abdominal organs). Also called intraperitoneal.
  15. IP Address A string of four numbers separated by periods used to represent a computer on the Internet.
  16. IP datagram The fundamental unit of information passed across any network utilizing Internet protocol.
  17. IP dialup access Nonpermanent access, by means of a switched network (e.g., the public switched telephone network), to any network utilizing The Internet Protocol…
  18. IP multicast A technique that allows packets to be simultaneously transmitted over the Mbone (multicast backbone on The Internet) to a selected set of destinations.
  19. IP number Synonym IP address.
  20. IP spoofing A technique used by hackers to access computer systems by modifying packet headers to make them appear to have originated from a trusted port. 2.
  21. IP switching A method of routing developed to use asynchronous transfer mode (ATM) hardware to route packets through networks more rapidly.
  22. IPC Information Policy Committee.
  23. IPng Abbreviation for IP next generation, IP version 6.
  24. IPP (1) Impact Point Prediction. (2) Industrial Preparedness Program.
  25. IPTF Abbreviation for Infrastructure Protection Task Force.
  26. IPX Abbreviation for Internetwork Packet Exchange. A proprietary (LAN) protocol.
  27. IR Infrared Satellite Imagery
  28. IRC Abbreviation for Internet relay chat. A service for conducting a chat on the Internet, i.e.
  29. Irradiance The direct, diffuse, and reflected solar radiation that strikes a surface.
  30. irradiation (ih-RAY-dee-AY-shun) The use of high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources to kill cancer cells and shrink tumors.
  31. irreversible encryption Encryption that produces ciphertext from which the original data cannot be reproduced. Note: Irreversible encryption is useful in authentication.
  32. IRTF Internet Research Task Force.
  33. ISB Abbreviation for independent sideband. See independent-sideband transmission.
  34. ISDN Integrated Services Digital Network.
  35. ISDN user part (ISUP) The functional part of the Signaling System No. 7 (SS7) protocol, i.e., the part that specifies the interexchange signaling procedures for the set up and…
  36. ISM (1) Industrial Security Manual. (2) Integrated Structure Model.
  37. ISMAP A Web page feature in which hyperlinks are assigned or "mapped" to different portions of a graphic image.
  38. ISO International Standards Organization.
  39. ISOC Abbreviation for Internet Society. A nongovernmental, international organization for global cooperation and coordination for The Internet and its…
  40. Isochrone A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several…
  41. isochronous 1. Of a periodic signal, pertaining to transmission in which the time interval separating any two corresponding transitions is equal to the unit interval…
  42. isochronous burst transmission In a data network where the information-bearer channel rate is higher than the input data signaling rate, transmission performed by interrupting, at…
  43. isochronous demodulation Demodulation in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  44. isochronous distortion The difference between the measured modulation rate and the theoretical modulation rate in a digital system.
  45. isochronous modulation Modulation in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  46. isochronous signal A signal in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval.
  47. isolate To restrict communication in both directions with a participant of the conference. [T1.647-1995]
  48. isolated bonding network Synonym isolated ground plane.
  49. isolated ground plane A set of interconnected frames that is intentionally grounded via only one connection to a ground reference; this plane, taken as a conductive unit with…
  50. isolated NRZ pulse A single bit period of logical value "1" with adjacent bit periods of logical value "0". [T1.106-1988]
  51. isolated pulse A pulse free from the effects of the other pulses in the same signal. (A suitable testing signal is a repetitive pattern of one "one" and seven "zeros".
  52. isolated RZ pulse Any bit period of logical value "1." [T1.106-1988]
  53. isolator See optical isolator.
  54. Isotropic the property of being independent of direction. Isotropic radiation has the same intensity regardless of the direction of measurement.
  55. isotropic antenna A hypothetical antenna that radiates or receives equally in all directions. Note: Isotropic antennas do not exist physically but represent convenient…
  56. isotropic gain Synonym absolute gain.
  57. ISP (Internet Service Provider). A business that delivers access to the Internet.
  58. IT information technology
  59. ITAR (International Traffic in Arms Regulations) ITAR are the regulations covering the exporting of weapons and weapons related technology from the United States.
  60. iterative impedance In electrical circuits, for a four-terminal network, the impedance that, if connected across one pair of terminals, will match the impedance across the…
  61. ITU Intent to Use -- see MORE INFO
  62. ITU-R The Radiocommunications Sector of the ITU; responsible for studying technical issues related to radiocommunications, and having some regulatory powers.
  63. ITU-T Abbreviation for International Telecommunication Union--Telecommunication Standardization Sector.
  64. IVDT Abbreviation for integrated voice data terminal. See integrated station.
  65. IXC Abbreviation for interexchange carrier.
  66. J-PEG [ or JPEG]: Abbreviation for Joint Photographic Experts Group. 1. A standardized, if relatively lossy, file format for transporting, storing, and/or…
  67. jabber In local area networks, transmission by a data station beyond the time interval allowed by the protocol.
  68. jack A female fitting or connector that accepts a male mating component ("plug") to facilitate an electrical connection.
  69. Jacket The enclosure on a water heater, furnace, or boiler.
  70. jam signal A signal that carries a bit pattern sent by a data station to inform the other stations that they must not transmit.
  71. jamming The deliberate radiation, reradiation, or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices, equipment…
  72. jamming margin The level of interference (jamming) that a system is able to accept and still maintain a specified level of performance, such as maintain a specified…
  73. jamming to signal ratio (J/S) The ratio, usually expressed in dB, of the power of a jamming signal to that of a desired signal at a given point such as the antenna terminals of a…
  74. Java applet A small application-program component that typically executes in a client's Web browser, but can execute in a variety of other simple applications or…
  75. Java Database Connectivity (JDBCTM) An industry standard for database-independent connectivity between a computer platform or device operating in the Java™ environment and a wide range of…
  76. JavaBean A portable, platform-independent, reusable component model that conforms to specification defining how Java objects interact.
  77. JavaTM A trademarked set of programming language technologies for creating and safely running software programs in both stand-alone and networked environments.
  78. JDBC An API for database-independent connectivity between the J2EE platform and a wide range of data sources.
  79. jerkiness In a video display, the perception, by human vision faculties, of originally continuous motion as a sequence of distinct "snapshots.
  80. jfif or .jfif: A file-name extension that identifies an image file compressed with the Joint Photographic Experts Group (JPEG) format.
  81. JiniTM A set of Java application program interfaces (APIs) to enable transparent networking of devices and services, thus eliminating the need for system or…
  82. jitter Abrupt and unwanted variations of one or more signal characteristics, such as the interval between successive pulses, the amplitude of successive cycles…
  83. JOB Joint Operations Board.
  84. job-recovery control file Synonym backup file.
  85. Johnson noise Synonym thermal noise.
  86. Joint See expansion joint, cold joint, construction joint, contraction joint, and control joint.
  87. joint multichannel trunking and switching system That composite multichannel trunking and switching system formed from assets of the Services, the Defense Communications System, other available systems…
  88. joint random buried plant Telecommunications outside plant that is directly buried in the same trench with power conductors, with no restriction regarding minimum separation…
  89. Joint Telecommunications Resources Board (JTRB) The body required to be established by Section 2(b) (3) of Executive Order No. 12472 to assist the Director of the Office of Science and Technology Policy…
  90. joint use aerial plant Aerial telecommunications and power plant utilizing the same structure, such as poles. [T1.318-2000]
  91. journal A chronological record of data processing operations that may be used to reconstruct a previous or an updated version of a file.
  92. joy stick In computer graphics, a lever (with at least two degrees of freedom) that is used as an input unit, normally as a locator.
  93. judder A temporal artifact associated with moving images, which artifact occurs when the image is sampled at one frame rate and converted to a different frame…
  94. Julian date The sequential day count reckoned consecutively beginning January 1, 4713 B.C. Note: The Julian date on January 1, 1990, was 2,446,892. 2.
  95. jumper Synonym cross-connection.
  96. junction point Synonym node.
  97. Jurisdiction (1) The legal authority of a court to hear and decide a case. Concurrent jurisdiction exists when two courts have simultaneous responsibility for the same…
  98. justification The process of changing the digit rate of a digital signal in a controlled manner so that it is in accord with a digit rate different from its own…
  99. justify To shift the contents of a register or a field so that the significant character at the specified end of the data is at a particular position. 2.
  100. K Smoke- Smoke in various concentrations can cause significant problems for people with respiratory ailments.

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