AASTRA 480i User Manual

Page of 504
Operational Features
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41-001129-00 Rev 09, Release 1.4.1  
IP Phone Administrator Guide
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:
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.
Asterisk/Broadworks Sesrver
Ring Tone Keywords
Bellcore-dr2
Bellcore-dr3
Bellcore-dr4
Bellcore-dr5