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Configuring Advanced Features

577

Parameters

Permitted Values

Default

1-Enabled

Note: If you change this parameter, the IP phone will reboot to make the change

take effect.

Web User Interface:

None

Phone User Interface:

None

phone_setting.rtcp_xr_report.enable

0 or 1

Description:

Enables or disables the IP phone to periodically (every 5 seconds) send RTCP-XR

packets to another participating phone during a call for call quality monitoring and

diagnosing.

0-Disabled

1-Enabled

Note: It works only if the value of the parameter “voice.rtcp_xr.enable” is set to 1

(Enabled). If you change this parameter, the IP phone will reboot to make the

change take effect.

Web User Interface:

None

Phone User Interface:

None

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 two ways:

 Based on current values, such as jitter, jitter buffer max and round trip delay.

 Computed using other metrics as input, such as listening Mean Opinion Score

(MOS-LQ) and conversational Mean Opinion Score (MOS-CQ).