Telecommunications terms starting with G

122 terms

  1. group (also referred to as a Technology Center or TC) - a unit of several Group Art Units in the mechanical, electrical, chemical or design area, managed by one…
  2. group 1. . . 4 facsimile See facsimile.
  3. group address In a communications network, a predefined address used to address only a specified set of users. Synonym collective address.
  4. group alerting and dispatching system A service feature that (a) enables a controlling telephone to place a call to a specified number of telephones simultaneously, (b) enables the call to be…
  5. group busy hour (GBH) The busy hour for a given trunk group.
  6. group delay The rate of change of the total phase shift with respect to angular frequency, dθ/d, through a device or transmission medium, where θ is the total phase…
  7. group delay time In a group of waves that have slightly different individual frequencies, the time required for any defined point on the envelope (i.e.
  8. group distribution frame (GDF) In frequency-division multiplexing, a distribution frame that provides terminating and interconnecting facilities at the group level, i.e.
  9. group index (N) In fiber optics, for a given mode propagating in a medium of refractive index η, the velocity of light in vacuum, c, divided by the group velocity of the…
  10. group patch bay See patch bay.
  11. Group Velocity The speed at which a particular wave front or swell train advances.
  12. grouping factor Synonym blocking factor.
  13. groupware Software designed to operate on a network and allow several people to work together on the same documents and files.
  14. GSM Ground Station Module.
  15. GSM (Global system for mobile communication) one of the leading digital cellular systems. GSM uses narrowband TDMA , which allows eight simultaneous calls on the same radio frequency.
  16. guard In computer security, a functional unit that provides a security filter between two data processing systems operating at different security levels or…
  17. guard band See frequency guard band, time guard band.
  18. guarded frequency A transmission frequency that is not to be jammed or interfered with because of the value of the information being derived from it.
  19. GUI Graphic User Interface. 123
  20. guided mode Synonym bound mode.
  21. guided ray In an optical fiber, a ray that is confined primarily to the core. Note: A guided ray satisfies the relation given by #f21 where θr is the angle the ray…
  22. guided wave A wave having (a) energy concentrated near a boundary, or between substantially parallel boundaries, separating materials of different properties and (b)…