Audio Features297Note: It works only if “features.dtmf.replace_tran” is set to 1 (Enabled).PermittedValues String within 32 charactersDefault BlankWeb UI Features->General Information->Tran Send DTMFLocal DTMF ToneLocal DTMF tone allows the phones to play a local DTMF tone during an active call. If this feature is enabled, you canhear the DTMF tone when pressing the IP phone’s keypad during a call.TopicLocal DTMF Tone ConfigurationLocal DTMF Tone ConfigurationThe following table lists the parameter you can use to configure the local DTMF tone.Parameter features.play_local_dtmf_tone_enable .cfgDescription It enables or disables the phone to play a local DTMF tone.PermittedValues0-Disabled1-Enabled, you can hear the DTMF tone when pressing the phone’s keypad during a call.Default 1Web UI Features->General Information->Play Local DTMF ToneVoice Quality Monitoring (VQM)Voice quality monitoring feature allows the phones to generate various quality metrics for listening quality and con-versational quality. These metrics can be sent between the phones in RTCP-XR packets. These metrics can also be sentin SIP PUBLISH messages to a central voice quality report collector. Yealink phones support two mechanisms for voicequality monitoring: RTCP-XR and VQ-RTCPXR.TopicsRTCP-XRVQ-RTCPXRRTCP-XRThe RTCP-XR mechanism, compliant with RFC 3611-RTP Control Extended Reports (RTCP XR), provides the metrics con-tained in RTCP-XR packets for monitoring the quality of calls. These metrics include network packet loss, delay metrics,analog metrics and voice quality metrics.TopicRTCP-XR ConfigurationRTCP-XR ConfigurationThe following table lists the parameters you can use to configure the RTCP-XR.Parameter voice.rtcp_xr.enable[1] .cfg
