Mitel 6867i Premium, Administrator'S Manual

Page: 387 / 1042

Operational Features
5-126
With consideration to scenarios where a dial tone should be played even if the phone is in a
“No Service” state (e.g. scenarios where the proxy may still accept INVITEs from the phone
even if unregistered), the “
no service congestion tone
” parameter has been programmed as
disabled by default.
CONFIGURING THE NO SERVICE CONGESTION TONE
Use the following procedures to configure the no service congestion tone feature.
For specific parameters you can set in the configuration files, see Appendix A, the section,
“No
Service Congestion Tone Settings”
on
page A-175
.
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 Mitel 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:
• 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.
Example:
CONFIGURATION FILES