Yealink SIP-T27G Administrator's Guide

Audio Features
184
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 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 phone to send RTCP packets.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Parameter
voice.rtcp_cname
[1]
<y0000000000xx>.cfg
Description
It configures the cname of the RTCP packets.
Permitted
Values
String
Default
Blank
[1]
If you change this parameter, the phone will reboot to make the change take effect.
VQ-RTCPXR
The VQ-RTCPXR mechanism, compliant with RFC 6035, sends the service quality metric reports contained in SIP
PUBLISH 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
Mean Opinion Score (MOS-CQ).
Topics
Voice Quality Reports
VQ-RTCPXR Display
Central Report Collector
Voice Quality Reports
Three 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.
Topic
Voice Quality Reports Configuration

Yealink SIP-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm