Installation guide

Operational Features
5-91 41-001561-00 REV00 – 10.2014
Configuring the Ring Tone via Speaker During Active Calls Feature
Use the following procedures to configure the ring tone via speaker during active calls feature.
No Service Congestion Tone
Administrators can configure the IP phones to play a congestion/fast busy tone instead of a dial tone when the phone is
in a “No Service” state. This feature allows visually impaired persons the ability to discern whether or not the phone is in
service and can be used to send/receive calls.
The configuration parameter “no service congestion tone” allows administrators the ability to enable this accessibility
feature. When enabled, the congestion tone will replace the conventional dial tone when the handset is off hook, a head-
set is employed, or the speakerphone is engaged. The congestion tone’s frequency/pattern is based on the respective
phone’s configured tone set. Additionally, the congestion tone is played on a per-line basis whereby only the specific
lines that are without service are affected.
With consideration to scenarios where a dial tone should be played even if the phone is in a “No Service” state (e.g. sce-
narios 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.
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 appropri-
ate 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.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section, “Ring Tone via Speaker During Active Calls Settings” on
pageA-138.
Note:
If the phone or individual lines are configured to have no registration by intent (e.g. if the Registrar is set to 0.0.0.0) ena-
bling the “no service congestion tone” parameter will have no effect and the default dial tone will be played.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section, “No Service Congestion Tone Settings” on pageA-138.