Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
77
The parameters in the newly downloaded configuration files will override the same parameters in files downloaded
earlier.
Note: For the phone running firmware version 82 or earlier, it downloads configuration files referenced in the boot
file in sequence.
For the phone running firmware version 83 or later, “static.specific_model.excluded_mode” determines which con-
figuration files referenced in the boot file to be downloaded.
Provisioning Methods
Yealink provides two ways to provision your phones:
l Manual Provisioning: provisioning via the local phone user interface or web user interface.
l Central Provisioning: provisioning through configuration files stored in a central provisioning server.
The method you use depends on how many phones need to be deployed and what features and settings to be con-
figured. Manual provisioning on the web or phone user interface does not contain all of the phone settings avail-
able with the centralized method. You can use the web user interface method in conjunction with a central
provisioning method and phone user interface method. We recommend using centralized provisioning as your
primary provisioning method when provisioning multiple phones.
Topics
Provisioning Methods Priority
Web User Interface
Phone User Interface
Central Provisioning
Viewing Configurations Configured via Different Provisioning Methods

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