Telecommunications terms starting with I

449 terms

  1. International Atomic Time (TAI) The time scale established by the Bureau International des Poids et Mesures (BIPM--International Bureau of Weights and Measures in Sevres, France) on the…
  2. international carrier (INC) A carrier authorized to provide telecommunications services outside World Zone 1 using the international dialing plan; however, the carrier has the option…
  3. International Direct Distance Dialing (IDDD) The direct dialing of an international call from a customer in the NANP area to a customer outside the NANP area.
  4. international fixed public control service A fixed service carried on for the purpose of communicating between transmitting stations, receiving stations, message centers or control points in the…
  5. international fixed public radiocommunication service A fixed service, the stations of which are open to public correspondence and which, in general, is intended to provide radiocommunication between any one…
  6. International Frequency Registration Board (IFRB) See Radio Regulations Board.
  7. international index of cooperation Synonym index of cooperation.
  8. International Organization for Standardization See ISO.
  9. international prefix The combination of digits to be dialed by a calling subscriber making a call to a subscriber in another country to obtain access to the automatic outgoing…
  10. International Radio Consultative Committee (CCIR) See ITU-R.
  11. International Reference Alphabet (IRA) No. 5 See ASCII.
  12. international routing code A 3-digit code within the North American numbering plan, beginning with 1, that classifies international calls as requiring either regular or special…
  13. International System of Units (SI) The modern form of the metric system, which has been adopted by the United States and most other nations.
  14. International Telecommunication Union (ITU) An international organization under the UN headquartered in Geneva concerned with telecommunications that develops international data communications…
  15. International Telegraph Alphabet Number 5 (ITA-5) An alphabet in which (a) 128 unique 7-bit strings are used to encode upper- and lower-case letters, 10 decimal numerals, special signs and symbols…
  16. International Telegraph and xxTelephone Consultative Committee (CCITT) See ITU-T.
  17. International Time Bureau (BIH) See International Atomic Time.
  18. Internationalization The process of designing and developing a product with a set of features, functions, and options intended to facilitate the adaption of the product to…
  19. Internaut Slang term for a user of the Internet. Synonym cybernaut.
  20. Internet A worldwide network of networks that all use the TCP/IP communications protocol and share a common address space.
  21. Internet [the] A worldwide interconnection of individual networks a) with an agreement on how to talk to each other, and b) operated by government, industry, academia…
  22. Internet address In The Internet protocol, the decimal-numeric, fixed-length address that identifies the hosts of data sources, and, specifically, a communication port.
  23. Internet appliance Synonym thin client.
  24. Internet Architecture Board (IAB) The technical body that oversees the development of the Internet suite of protocols (commonly referred to as "TCP/IP"), and that has two task forces (the…
  25. Internet Assigned Numbers Authority (IANA) An organization, directed by the Internet Architecture Board, that assigns IP numbers and protocol parameters such as port, protocol, and enterprise…
  26. Internet assistant Commercial software, written in HTML, that combines the functions of a file-conversion tool and a Web browser.
  27. Internet box Synonym thin client.
  28. Internet control message protocol See ICMP.
  29. Internet information center See InterNIC.
  30. Internet mail agent Synonym message transfer agent.
  31. Internet mall Synonym cybermall.
  32. Internet Network Information Center See InterNIC.
  33. Internet phone A combination of software and hardware that allows a user to approximate a telephone conversation over an Internet connection instead of using a…
  34. Internet presence provider See IPP.
  35. Internet protocol (IP) A DOD standard protocol designed for use in interconnected systems of packet-switched computer communication networks.
  36. Internet protocol (IP) spoofing The creation of IP packets with counterfeit (spoofed) IP source addresses. 2. A method of attack used by network intruders to defeat network security…
  37. Internet protocol address Synonym Internet address. See IP address.
  38. Internet relay chat See IRC.
  39. Internet Research Task Force See IRTF.
  40. Internet resource Within the Internet, an accessible facility or entity that contains information or provides data-processing capabilities.
  41. Internet search engine Synonym droid.
  42. Internet Service Provider An Internet Service Provider (ISP) provides connections to the Internet for users who do not have their own network.
  43. Internet Society See ISOC.
  44. Internet telephone See Internet phone.
  45. Internet telephony See Internet phone.
  46. Internet2 See I2.
  47. internetwork Synonym internet.
  48. internetwork connection See gateway.
  49. internetwork interface (INI) The point of demarcation between networks when service is provided across multiple networks. [T1.503-1989] [T1.507-1996]
  50. Internetwork Packet Exchange See IPX.
  51. internetworking The process of interconnecting two or more individual networks to facilitate communications among their respective nodes.
  52. InterNIC Contraction of Internet Network Information Center. The association of providers of domain-name registration, information, and database services to the…
  53. interoffice trunk A single direct transmission channel, e.g., voice-frequency circuit, between central offices.
  54. Interoperability The ability of systems, units, or forces to provide services to or accept services from other systems, units, or forces and to use the services so…
  55. interoperability standard A document that establishes engineering and technical requirements that are necessary to be employed in the design of systems, units, or forces and to use…
  56. interoperation The use of interoperable systems, units, or forces. [JP 1-02]
  57. interpolation gain The input trunk channel multiplication ratio that is achieved through DSI. The interpolation gain is the ratio of the number of input transmission trunks…
  58. interposition trunk A single direct transmission channel, e.g., voice-frequency circuit, between two positions of a large switchboard to facilitate the interconnection of…
  59. interpret To translate and to execute each source language statement of a computer program before translating and executing the next statement.
  60. interrogation The transmission of a signal or combination of signals intended to trigger a response. 2.
  61. interrupt An asynchronous message sent to a process or thread that interrupts what it is currently doing.
  62. interrupted continuous wave (ICW) Modulation in which there is on-off keying of a continuous wave.
  63. interrupted isochronous transmission Synonym isochronous burst transmission.
  64. interruption Synonym interrupt.
  65. interruption control A system that monitors a pilot for interruptions on frequency division multiplexing (FDM) systems and that transmits an indication to the switching…
  66. interswitch trunk A single direct transmission channel, e.g., voice-frequency circuit, between switching nodes.
  67. intersymbol interference In a digital transmission system, distortion of the received signal, which distortion is manifested in the temporal spreading and consequent overlap of…
  68. intertoll circuits Circuits between toll centers and circuits between a toll center and a tandem system in a different toll center area. [47 CFR Pt.36-A]
  69. intertoll trunk A single direct transmission channel, e.g., voice-frequency circuit, between two toll offices.
  70. interworking functions Mechanisms that mask differences in physical, link, and network technologies by converting (or mapping) states and protocols into consistent network and…
  71. intra-LATA Within the boundaries of a local access and transport area (LATA).
  72. intramodal distortion In an optical fiber, distortion caused by dispersion, such as material or profile dispersion, of a given propagating mode. [After 2196]
  73. intranet A private network that uses Internet-related technologies to provide services within an organization.
  74. intraoffice trunk A single direct transmission channel, e.g., voice-frequency circuit, within a given switching center.
  75. intrinsic joint loss Of nonidentical optical fibers joined by a splice or a mated pair of connectors, the power loss attributable to manufacturing variations, in such…
  76. intrinsic noise In a transmission path or device, that noise inherent to the path or device and not contingent upon modulation.
  77. intrusive measurements Measurements that require that the facility be taken out of service and made unavailable to the user. [T1.Rpt25-1993]
  78. invalid frame A frame for which one or more of the following conditions apply: the frame is not properly bounded by flags; the frame does not consist of an integral…
  79. Inventory a detailed accounting of all items within a specified location. Examples include but are not limited to: evidence in the evidence vault, evidence in the…
  80. inverse adaptive quantizer In the encoder and the feedback path of the decoder, the process that maps the core bits into a quantized difference signal.
  81. inverse multiplexer A functional unit capable of accessing and combining two or more low-speed circuits into a virtual broadband circuit, up to and including an aggregate…
  82. Inverse Square Law The law that states when thermal or nuclear radiation is uniformly emitted from a point source, the amount received per unit area at any given distance…
  83. inverted position In frequency-division multiplexing, a position of a translated channel in which an increasing signal frequency in the untranslated channel causes a…
  84. Inverter A device that converts direct current electricity (from for example a solar photovoltaic module or array) to alternating current for use directly to…
  85. Inward Wide-Area Telephone Service (INWATS) See eight-hundred (800) service.
  86. INWATS Acronym for Inward Wide-Area Telephone Service. See eight-hundred (800) service.
  87. IOC (1) Initial Operational Capability. (2) Intelligence Operations Center. (3) Integrated Optics Chip.
  88. IONL Abbreviation for Internal Organization of the Network Layer. The OSI standard for the detailed architecture of the Network Layer.
  89. 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…
  90. ionosphere sounder A device that transmits signals for the purpose of determining ionospheric conditions. [NTIA] [RR]
  91. ionospheric absorption Absorption occurring as a result of interaction between an electromagnetic wave and free electrons in the ionosphere.
  92. ionospheric disturbance An increase in the ionization of the ionosphere, caused by solar activity, which results in greatly increased radio wave absorption.
  93. ionospheric forward scatter (IFS) Synonym ionospheric scatter.
  94. ionospheric reflection Of electromagnetic waves propagating in the ionosphere, a redirection, i.e., bending--by a complex processing involving reflection and refraction--of the…
  95. ionospheric scatter The propagation of radio waves by scattering as a result of irregularities or discontinuities in the ionization of the ionosphere.
  96. ionospheric sounding A technique that provides real-time data on high-frequency ionospheric-dependent radio propagation, using a basic system consisting of a synchronized…
  97. ionospheric turbulence Ongoing disturbances of the ionosphere that scatter incident electromagnetic waves.
  98. IP Within the peritoneal cavity (the area that contains the abdominal organs). Also called intraperitoneal.
  99. IP Address A string of four numbers separated by periods used to represent a computer on the Internet.
  100. IP datagram The fundamental unit of information passed across any network utilizing Internet protocol.