Yealink T21PE2 User Manual

Audio Features
367
Local DTMF Tone Configuration
Local DTMF Tone Configuration
The following table lists the parameter you can use to configure the local DTMF tone.
Parameter features.play_local_dtmf_tone_enable <y0000000000xx>.cfg
Description It enables or disables the IP phone to play a local DTMF tone.
Permitted
Values
0-Disabled
1-Enabled, you can hear the DTMF tone when pressing the IP phone’s keypad during a call.
Default 1
Web UI 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 con-
versational 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 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.
Topic
RTCP-XR Configuration
RTCP-XR Configuration
The following table lists the parameters you can use to configure the RTCP-XR.
Parameter
voice.rtcp_xr.enable
[1]
<y0000000000xx>.cfg
Description It enables or disables the IP phone to send RTCP-XR packets.
Permitted
Values
0-Disabled
1-Enabled
Default 0
Web UI Settings->Voice Monitoring->Voice RTCP-XR Report
Parameter
voice.rtcp.enable
[1]
<y0000000000xx>.cfg
Description It enables or disables the IP phone to send RTCP packets.
Permitted
Values
0-Disabled
1-Enabled

Yealink T21PE2 Specifications

General

Lines	2
PoE Support	Yes
Wall Mountable	Yes
Supported Protocols	SIP
HD Audio	Yes
Ethernet Ports	2
Headset Port	Yes
Voice Codecs	G.722, G.711
Power Supply	PoE
Display	132 x 64 pixel graphical LCD