Nortel Networks 2007 - Manual (Page 43)

Terms you should know
Message (Inbox)
A soft key on your telephone that connects to your voice
messaging system when the key is tapped.
Message Waiting indicator/Incoming Call indicator
An LCD or an LED that indicates the status of a feature by the
flash, wink, steady on, or off.
Meridian 1
An office communication system.
More..
An option allowing access to the multiple layers of the soft keys.
Mute key
A fixed key used to listen to a caller without transmitting.
Navigation key
Contains the Up/Down and Left/Right keys used to scroll through
menus and lists appearing on the LCD display screen.
Off-hook
Any line selected to make a call or receive an incoming call.
The term off-hook is applied whether (a) the end user lifts up the
handset, (b) the end user presses a line key, (c) the call is
automatically answered at the set, or (d) a line is automatically
selected for an outgoing call.
Outbox/Shift key
A soft key used to switch between two feature key sets to provide
access to an additional six lines/features.
Primary Directory Number
The main extension number on your telephone.