Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
6
Voice Activity Detection (VAD)
175
VAD Configuration
175
Comfort Noise Generation (CNG)
175
CNG Configuration
175
Jitter Buffer
176
Jitter Buffer Configuration
176
Smart Noise Block
177
Smart Noise Block Configuration
178
Acoustic Shield
178
Acoustic Shield Configuration
178
Smart Noise Filtering
179
Smart Noise Filtering Configuration
179
DTMF
179
DTMF Keypad
179
Transmitting DTMF Digit
180
Transmitting DTMF Digit Configuration
180
Suppress DTMF Display
182
Suppress DTMF Display Configuration
182
Transfer via DTMF
182
Transfer via DTMF Configuration
182
Local DTMF Tone
183
Local DTMF Tone Configuration
183
Voice Quality Monitoring (VQM)
183
RTCP-XR
183
RTCP-XR Configuration
184
VQ-RTCPXR
184
Voice Quality Reports
184
Voice Quality Reports Configuration
185
VQ-RTCPXR Display
186
VQ-RTCPXR Display Configuration
187
Central Report Collector
189
Central Report Collector Configuration
190
Phone Customization
191
Language
191
Supported Languages
191
Language Display Configuration
192
Language for Phone Display Customization
193
Customizing a Language Pack for Phone Display
193
Custom Language for Phone Display Configuration
194
Example: Setting a Custom Language for Phone Display
194
Language for Web Display Customization
195
Customizing a Language Pack for Web Display
195
Customizing a Language Pack for Note Display
196
Custom Language for Web and Note Display Configuration
196

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