Terms you should know

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:rhood@example.net. A URI can contain what appears to be a telephone number; for example, sip:+14085550100@172.16.0.222.

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.

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Avaya 1220 manual Sip