Yealink SIP-T19 E2 T4 Series, Administrator'S Manual

Page: 797 / 981

Configuring Audio Features
775
To configure RTCP-XR feature via web user interface
:
1.
Click on
Settings
->
Voice Monitoring
.
2.
Select the desired value from the pull-down list of
Voice RTCP-XR Report
.
3.
Click
Confirm
to accept the change.
A dialog box pops up to prompt that the settings will take effect after a reboot.
5.
Click
OK
to reboot the phone.
VQ-RTCPXR
The VQ-RTCPXR mechanism, compliant with RFC 6035 , sends the service quality metric reports
contained in SIP PUBLISH messages to the central report collector. Three types of quality reports
can be enabled:

Session
: Generated at the end of a call.

Interval
: Generated during a call at a configurable period.

Alert
: Generated when the call quality degrades below a configurable threshold.
A wide range of performance metrics are generated in the following three ways:

Based on current values, such as jitter, jitter buffer max and round trip delay.

Covers the time period from the beginning of the call until the report is sent, such as
network packet loss.

Computed using other metrics as input, such as listening Mean Opinion Score (MOS-LQ)
and conversational Mean Opinion Score (MOS-CQ).
To operate with central report collector, IP phones must be configured to forward their voice
quality reports to the specified report collector. You can specify the report collector on a
per-line basis.