Avaya NN43170-100 - Manual (Page 371)

Terms you should know
371
Enter key
The center key of the Navigation Cluster key is used to select
menu items and to confirm changes. The Enter key duplicates the
function of the context-sensitive soft keys Select, and Set.
Expansion Module
The Expansion Module is a hardware accessory that connects to
the IP Deskphone and provides additional line appearances and
feature keys. A maximum of three modules are supported. The IP
Deskphone 1120E/1121E and IP Deskphone 1140E can have up
to 54 additional line/feature keys with three Expansion Modules.
Feature Status Indicator
This refer to an LCD or an LED signal that indicates a data
message, contact, or feature status by a flash, wink, steady on, or
off.
Fixed keys
These are the hard-labeled keys of the IP Deskphone that have a
specific function.
Goodbye key
This is the fixed key used to end an active call or exit an active
menu.
Handsfree key
This is the fixed key used to activate Handsfree.
Hold key
This is the fixed key used to place an active call on hold.
IM (Instant Message)
You can use IMs to send a text message to a specific user. The
user must be logged on to receive the IM.