Telecommunications terms starting with I

449 terms

  1. 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…
  2. 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.
  3. IP number Synonym IP address.
  4. 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.
  5. IP switching A method of routing developed to use asynchronous transfer mode (ATM) hardware to route packets through networks more rapidly.
  6. IPC Information Policy Committee.
  7. IPng Abbreviation for IP next generation, IP version 6.
  8. IPP (1) Impact Point Prediction. (2) Industrial Preparedness Program.
  9. IPTF Abbreviation for Infrastructure Protection Task Force.
  10. IPX Abbreviation for Internetwork Packet Exchange. A proprietary (LAN) protocol.
  11. IR Infrared Satellite Imagery
  12. IRC Abbreviation for Internet relay chat. A service for conducting a chat on the Internet, i.e.
  13. Irradiance The direct, diffuse, and reflected solar radiation that strikes a surface.
  14. 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.
  15. irreversible encryption Encryption that produces ciphertext from which the original data cannot be reproduced. Note: Irreversible encryption is useful in authentication.
  16. IRTF Internet Research Task Force.
  17. ISB Abbreviation for independent sideband. See independent-sideband transmission.
  18. ISDN Integrated Services Digital Network.
  19. 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…
  20. ISM (1) Industrial Security Manual. (2) Integrated Structure Model.
  21. ISMAP A Web page feature in which hyperlinks are assigned or "mapped" to different portions of a graphic image.
  22. ISO International Standards Organization.
  23. ISOC Abbreviation for Internet Society. A nongovernmental, international organization for global cooperation and coordination for The Internet and its…
  24. 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…
  25. 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…
  26. 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…
  27. 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.
  28. isochronous distortion The difference between the measured modulation rate and the theoretical modulation rate in a digital system.
  29. 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.
  30. 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.
  31. isolate To restrict communication in both directions with a participant of the conference. [T1.647-1995]
  32. isolated bonding network Synonym isolated ground plane.
  33. 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…
  34. isolated NRZ pulse A single bit period of logical value "1" with adjacent bit periods of logical value "0". [T1.106-1988]
  35. 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".
  36. isolated RZ pulse Any bit period of logical value "1." [T1.106-1988]
  37. isolator See optical isolator.
  38. Isotropic the property of being independent of direction. Isotropic radiation has the same intensity regardless of the direction of measurement.
  39. isotropic antenna A hypothetical antenna that radiates or receives equally in all directions. Note: Isotropic antennas do not exist physically but represent convenient…
  40. isotropic gain Synonym absolute gain.
  41. ISP (Internet Service Provider). A business that delivers access to the Internet.
  42. IT information technology
  43. ITAR (International Traffic in Arms Regulations) ITAR are the regulations covering the exporting of weapons and weapons related technology from the United States.
  44. 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…
  45. ITU Intent to Use -- see MORE INFO
  46. ITU-R The Radiocommunications Sector of the ITU; responsible for studying technical issues related to radiocommunications, and having some regulatory powers.
  47. ITU-T Abbreviation for International Telecommunication Union--Telecommunication Standardization Sector.
  48. IVDT Abbreviation for integrated voice data terminal. See integrated station.
  49. IXC Abbreviation for interexchange carrier.