Aastra Telecom 480I CT manual How Priority Alerting Works

IP Phone Administrator Guide Operational Features

Operational Features

Priority Alerting

Priority alerting on the IP phones is a feature that allows incoming calls to trigger pre-defined ringing or call waiting alert tones.

You can enable or disable priority alerting on the IP phone for the Asterisk, Broadworks, and Sylantro servers using the configuration files and the Aastra Web UI. Configuration of priority alerting is on a global-basis only.

How Priority Alerting Works

When the IP phone detects an incoming call, the phone firmware inspects the INVITE request in the IP packet for an "Alert-Info" header.

If it contains an "Alert-Info" header, the firmware strips out the URL and keyword parameter and maps it to the appropriate Bellcore tone.

If there is no keyword parameter in the "Alert-Info" header, or the INVITE message contains no "Alert-Info" header, then the IP phone firmware uses the Bellcore standard ring tone.

Asterisk/Broadworks Servers

The ring tone keywords that can display in the "Alert-Info" header for an Asterisk and Broadworks server are:

Asterisk/Broadworks Sesrver

Ring Tone Keywords

Bellcore-dr2

Bellcore-dr3

Bellcore-dr4

Bellcore-dr5

When the ring tone keywords appear in an "Alert-Info" header from an Asterisk or Broadworks server, the IP phone maps the keywords to the default ring tone patterns.

5-124 41-001129-00 Rev 09, Release 1.4.1