Yealink SIP-T48U Getting Started

Recovery Mode on Yealink IP phones
4
4. Click Menu in the main page and select the IP address of the PC from IP address.
Configuring the TFTP Server
This section shows how to configure a TFTP server for the windows system using the tftpd32 application.
You can download the tftpd32 application online: http://tftpd32.jounin.net/tftpd32_download.html. If there
is a TFTP server installed on your local system, you can skip this section and go to the next.
Procedures
1. Create a TFTP root directory on the local system.
2. Place resource files to this root directory.
3. Double click the tftpd32.exe to start the application.
4. Click the button to locate the TFTP root directory from the local system.
5. Select the local IP address from the Server interface drop-down menu.

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