Avaya 1220 - Manual (Page 193)

Terms you should know
193
Shared Directory Number
A DN (extension) that is shared by two or more persons.
SIP
Session Initiation Protocol. This is the call-control protocol used
by an IP Deskphone with SIP firmware.
SIP Proxy Server
A device on the network that acts on behalf of your telephone,
translating and routing call-control messages
SIP Registrar
A device on the network that manages user-location information.
SIP URI
Uniform Resource Identifier (URI) is analogous to a telephone
number, for example, SIP:[email protected]. A URI can
contain what appears to be a telephone number; for example,
sip:[email protected].
Special Prefix code (SPRE)
Special codes entered using the dialpad, followed by a two-digit
access code, that enable features (for example, Call Forward All
Calls requires entry of SPRE code + 74).
Soft keys
A set of keys programmed by your system administrator. These
four keys, directly below the display area, have four
programmable layers. These keys are also used to configure
parameters in the
Telephone Options menu.
Speakerphone Mode
The speaker and microphone in the base are in use instead of the
equivalent components in the handset or headset.