Yealink SIP-T43U Recovery Guide

Recovery Mode on Yealink IP phones
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2. Click OK twice to save the settings.
3. Long press and reconnect the power adapter to trigger the recovery mode.
The W90DM/W90B will download and upgrade the firmware from the TFTP server.
You can view the syslog of the TFTP server to check if the W90DM/W90B downloads the firmware
successfully as shown below:
4. Find the current IP address of the device on the DHCP server in the list of registered DHCP clients.
Using Recovery Mode on Yealink IP Phones
(USB Flash Drive)
This section introduces how to perform recovery mode using USB flash drive on Yealink IP phones step
by step.
For MP54/MP56/MP58/VP59/SIP-T58A/T57W/T54W/
T53W/T53/T48U/T48S/T46U/T46S/T43U/T42U/T42S/T41
S/CP920 IP Phones
This section is only applicable to SIP phone series including MP54, MP56, MP58, CP920, SIP-T41S,
SIP-T42S, SIP-T42U, SIP-T43U, SIP-T46S, SIP-T46U, SIP-T48S, SIP-T48U, SIP-T53, SIP-T53W,
SIP-T54W, SIP-T57W, SIP-T58A, and VP59.
The following procedures take the SIP-T46S IP phone for reference.

Yealink SIP-T43U Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Wall mountable	Yes
Sustainability certificates	REACH, RoHS
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Power consumption (typical)	2.2 W
Bluetooth version	4.1
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP/TFTP/HTTP/HTTPS, IPv6, LLDP/CDP/DHCP VLAN
USB 2.0 ports quantity	2
Lines quantity	12 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
Voice codecs	AGC, AJB, AMR-NB, AMR-WB, G.711Mu, G.711a, G.723.1, G.726, G.729ab, OPUS, PLC, VAD, iLBC
Number of handles included	1 pc(s)
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	3.7 \
Display resolution	360 x 160 pixels
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	206.2 mm
Width	224.9 mm
Height	174.9 mm
Package depth	223 mm
Package width	246 mm
Package height	120 mm