Audio Features
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Features->General Information->Tran Send DTMF
Local DTMF Tone
Local DTMF tone allows IP phones to play a local DTMF tone during an active call. If this feature is
enabled, you can hear the DTMF tone when pressing the IP phone’s keypad during a call.
Topic
Local DTMF Tone Configuration
Local DTMF Tone Configuration
The following table lists the parameters you can use to configure the local DTMF tone.
features.play_local_dtmf_tone_enable
It enables or disables the IP phone to play a local DTMF tone.
0-Disabled
1-Enabled, you can hear the DTMF tone when pressing the IP phone’s keypad during a
call.
Features->General Information->Play Local DTMF Tone
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. Yealink
IP phones support two mechanisms for voice quality monitoring: RTCP-XR and VQ-RTCPXR.
Topics
RTCP-XR
VQ-RTCPXR
RTCP-XR
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.
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