Terms you should know37Nortel IP Phone Key Expansion Module (KEM)An optional hardware module which provides additional lineappearances and feature keys to your IP Phone. Up to two KEMscan be attached to your IP Phone 2002, providing a total of 48keys.Message (Inbox)A fixed key on your telephone which connects to your voicemessaging system when the key is pressed.Message waiting indicator/Incoming call indicatorAn LCD or an LED that indicates the status of a feature by theflash, wink, steady on, or off.Meridian 1An office communication system.More..An option allowing access to the multiple layers of the soft keys.Soft keys are the four keys located directly below the displayarea.Mute keyA fixed key used to listen to the caller without transmitting.Navigation keyUp/Down and Left/Right keys used to scroll through menus andlists appearing on the LCD screen.Off-hookAny line selected to make a call or receive an incoming call.The term off-hook is applied whether (a) the end-user lifts up thehandset, (b) the end-user presses a line key, (c) the call isautomatically answered at the set, or (d) a line is automaticallyselected for an outgoing call.