Yealink SIP-T2 Series

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones
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2. Select the desired value from the pull-down list of Play Local DTMF Tone.
3. Click Confirm to accept the change.
Voice Quality Monitoring (VQM)
Voice quality monitoring feature allows the IP phones to generate various quality metrics for
listening quality and conversational quality. These metrics can be sent between the phones in
RTCP-XR packets. These metrics can also be sent in SIP PUBLISH messages to a central voice
quality report collector. Two mechanisms for voice quality monitoring are supported by Yealink
IP phones:
 RTCP-XR
 VQ-RTCPXR
The RTCP-XR mechanism, compliant with RFC 3611-RTP Control Extended Reports (RTCP XR),
provides the metrics contained in RTCP-XR packets for monitoring the quality of calls. These
metrics include network packet loss, delay metrics, analog metrics and voice quality metrics.
Procedure
RTCP-XR can be configured using the following methods.
Central
Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure RTCP-XR.
Parameter:
voice.rtcp_xr.enable
Web User Interface
Configure RTCP-XR.