Nortel Networks 2210 - Manual (Page 109)

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Terms you should know
Special dial tone
The three consecutive tones followed by dial tone that
you hear when accessing handset features.
Status Messages
A message displayed to inform the user of important
information. A right arrow appears if more than one
Status Message is present. Examples of Status Messages
include: Message Waiting, All Lines Forwarded to:
6453, Do Not Disturb On, Ring Again active, Ringer is
OFF, and Line x Unavailable.
System or switch
Your office communications system.
User Interface
In this User Guide, User Interface refers to the display
screen that interacts with the end user as a result of an
action or event.