Terms you should know196Directory Number (DN)A number consisting of one to seven digits for an IP Phone, andalso known as an extension number.Feature displayAn area that shows status information about the feature in use. Italso displays the name and status of the active session.Feature Status Lamp indicatorAn LCD or an LED that indicates a data message, contact, orfeature status by a flash, wink, steady on, or off.Fixed keyThe hard-labeled keys on your IP Phone.Flexible Feature Codes (FFCs)Specialized codes entered using the dialpad that enable features(for example, Ring Again).Goodbye keyA fixed key used to end an active call.IndicatorAn LCD or an LED that indicates the status of a feature by theflash, wink, steady on, or off.Information displayAny display of call activity, lists, prompts, and status of calls. If thetext message exceeds the available display area, a scroll arrowicon indicates that you must use the scroll keys to view theremaining text.Interrupted dial toneA broken or pulsed dial tone that sounds when you access somefeatures on your IP Phone.
