Datasharp Telecom (Chiltern)

A group of extensions is rung by dialling a number. The group may be set as a ring group, in which case all of the extensions ring at once, or it may be set as a Hunt Group, in which case the system will find a free extension in the group to take the call.

Graphical User Interface. A program interface, such as Microsoft Windows, that takes advantage of the computer's graphics capabilities to make the program easier to use. Well-designed graphical user interfaces can free the user from learning complex command languages. A GUI will usually feature basic components such as a pointing device (mouse or trackball) to allow you to select objects, icons (small pictures) that represent commands, a desktop area, where icons are grouped, and a menu for the user to select a command from.