Telecommunications terms starting with J

34 terms

  1. J-PEG [ or JPEG]: Abbreviation for Joint Photographic Experts Group. 1. A standardized, if relatively lossy, file format for transporting, storing, and/or…
  2. jabber In local area networks, transmission by a data station beyond the time interval allowed by the protocol.
  3. jack A female fitting or connector that accepts a male mating component ("plug") to facilitate an electrical connection.
  4. Jacket The enclosure on a water heater, furnace, or boiler.
  5. jam signal A signal that carries a bit pattern sent by a data station to inform the other stations that they must not transmit.
  6. jamming The deliberate radiation, reradiation, or reflection of electromagnetic energy for the purpose of disrupting enemy use of electronic devices, equipment…
  7. 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…
  8. 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…
  9. 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…
  10. 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…
  11. JavaBean A portable, platform-independent, reusable component model that conforms to specification defining how Java objects interact.
  12. JavaTM A trademarked set of programming language technologies for creating and safely running software programs in both stand-alone and networked environments.
  13. JDBC An API for database-independent connectivity between the J2EE platform and a wide range of data sources.
  14. jerkiness In a video display, the perception, by human vision faculties, of originally continuous motion as a sequence of distinct "snapshots.
  15. jfif or .jfif: A file-name extension that identifies an image file compressed with the Joint Photographic Experts Group (JPEG) format.
  16. JiniTM A set of Java application program interfaces (APIs) to enable transparent networking of devices and services, thus eliminating the need for system or…
  17. jitter Abrupt and unwanted variations of one or more signal characteristics, such as the interval between successive pulses, the amplitude of successive cycles…
  18. JOB Joint Operations Board.
  19. job-recovery control file Synonym backup file.
  20. Johnson noise Synonym thermal noise.
  21. Joint See expansion joint, cold joint, construction joint, contraction joint, and control joint.
  22. 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…
  23. joint random buried plant Telecommunications outside plant that is directly buried in the same trench with power conductors, with no restriction regarding minimum separation…
  24. 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…
  25. joint use aerial plant Aerial telecommunications and power plant utilizing the same structure, such as poles. [T1.318-2000]
  26. journal A chronological record of data processing operations that may be used to reconstruct a previous or an updated version of a file.
  27. 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.
  28. 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…
  29. 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.
  30. jumper Synonym cross-connection.
  31. junction point Synonym node.
  32. 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…
  33. 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…
  34. 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.