Nortel 1230 User Manual page 178

Terms you should know
Network Address
IP address. Uniquely identifies a device on the network. Used for
routing information to that device.
Off-hook
Any line selected to make a call or receive a 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 IP Phone, or (d) a line is automatically selected
for an outgoing call.
Paging tone
A special tone (two beeps followed by dial tone) that sounds
when you use the Radio Paging feature.
Primary Line
The first line to be registered by the user is the primary line that is
assigned to the Line key at the bottom right of your phone's LCD
Power-Over-Ethernet
Provides power over the network cable that is also used for data
communications.
Registrar
See SIP registrar
Ringback/ring tone
A sound indicating that a call you have made is ringing at its
destination.
Services key
A fixed key used to access options such as Telephone Options,
Password Admin, Virtual Office Login, Virtual Office Logout, Test
Local Mode, and Resume Normal Mode.
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