Administrator’s Guide for SIP-T58V/T58A/T56A/CP960 IP Phones298Description It enables or disables the phone to send RTCP-XR packets.PermittedValues0-Disabled1-EnabledDefault 0Web UI Settings->Voice Monitoring->Voice RTCP-XR ReportParameter voice.rtcp.enable[1] .cfgDescription It enables or disables the phone to send RTCP packets.PermittedValues0-Disabled1-EnabledDefault 1Parameter voice.rtcp_cname[1] .cfgDescription It configures the cname of the RTCP packets.PermittedValues StringDefault Blank[1]If you change this parameter, the phone will reboot to make the change take effect.VQ-RTCPXRThe VQ-RTCPXR mechanism, compliant with RFC 6035, sends the service quality metric reports contained in SIPPUBLISH messages to the central report collector.A wide range of performance metrics are generated in the following three ways:l Based on current values, such as jitter, jitter buffer max and round trip delay.l Covers the time period from the beginning of the call until the report is sent, such as network packet loss.l Computed using other metrics as input, such as listening Mean Opinion Score (MOS-LQ) and conversational MeanOpinion Score (MOS-CQ).TopicsVoice Quality ReportsVQ-RTCPXR DisplayCentral Report CollectorVoice Quality ReportsThree types of quality reports can be enabled:l Session: Generated at the end of a call.l Interval: Generated during a call at a configurable period.l Alert: Generated when the call quality degrades below a configurable threshold.TopicVoice Quality Reports ConfigurationVoice Quality Reports ConfigurationThe following table lists the parameters you can use to configure the service quality reports.