Avaya 1140E IP - Manual (Page 410)

Terms you should know
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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 normally has four pairs of copper wire.
Copy Key
This is a fixed key used to copy entries to your Address Book,
Speed Dial Key, Send IM Key, and Call Forward key.
Date/Time display
The Avaya 1140E 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.