Yealink CD860, Administrator'S Manual

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Configuring Advanced Features
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3. Select the desired value from the pull-down list of Voice RTCP-XR Report.
4. 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.
The VQ-RTCPXR mechanism, complaint 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.