Yealink SIP-T48U 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-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm