Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
18
The web screen displays "Default password is in use. Please change!"
558
Logo Issues
559
Why does the IP phone use DOB format logo file instead of popular BMP, JPG and so on?
559
Power and Startup Issues
559
Both PoE cable and power adapter is connected to the phone
559
The power LED indicator has no lights
559
The Phone screen is black
559
The IP phone always displays the Yealink logo
559
Other Issues
559
The difference among user name, register name, and display name
559
On code and off code
559
The difference between RFC 2543 Hold enabled and disabled
560
The difference between Shared Call Appearance (SCA) and Bridge Lines Appearance (BLA)
560
Appendix
561
RFC and Internet Draft Support
561
Reading Icons
563

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