Avaya 1230 User Manual page 307

Terms you should know
Category 5e (Cat5e)
Most Cat5 cable manufactured after 1996 also supports
1000BaseT (GigE) installations, and is designated Cat 5e.
Normally, Cat5e cable has four pairs of copper wire.
Category 6 (Cat6)
This is a cable and its associated connecting hardware capable
of transmitting at speeds up to 200 MHz. Designed specifically to
support 1000BaseT (GigE), this cable is also compatible with
10BaseT, 100BaseT4, and 100BaseTX installations. Normally,
this cable has four pairs of copper wire.
Date/Time display
The Avaya 1230 IP Deskphone shows the current date and time
when the telephone is in an idle state.
Directory Number (DN)
This is a telephone number you enter to initiate a call, for
example, (555) 555-5555.
Domain
This is the Internet Protocol address to which the IP Deskphone
connects when you logon.
Do Not Disturb
This is a feature you activate to block all incoming calls.
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
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