Audio
Voice codecs	AGC, AJB, AMR-NB, AMR-WB, G.711Mu, G.711a, G.723.1, G.726, G.729ab, OPUS, PLC, VAD, iLBC
Speakerphone
Microphone mute
Comfort noise generation (CNG)
Packet loss concealment (PLC)
Certificates
Compliance certificates	REACH, RoHS
Sustainability compliance
Design
Product type	IP Phone
Handset type	Wired handset
Product colour	Grey
Mounting	Desk/Wall
Wall mountable
Display
Display	LCD
Display diagonal	9.4 cm (3.7")
Display resolution	360 x 160 pixels
Touchscreen
Backlight display
Logistics data
Harmonized System (HS) code	85171800
Management features
Plug and Play
Network
Ethernet LAN interface type	Gigabit Ethernet
Ethernet LAN data rates	10,100,1000 Mbit/s
Bluetooth version	4.1
Supported network protocols	FTP/TFTP/HTTP/HTTPS, IPv6, LLDP/CDP/DHCP VLAN
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN
Wi-Fi
Bluetooth
Quality of Service (QoS) support
DHCP client
Syslog
Operational conditions
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95%
Packaging content
Number of handles included	1 pc(s)
Mounting kit
Ethernet cable
Handset
Quick start guide
Performance
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Hearing aid compatibility
Phone features
Lines quantity	12 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
Answering machine
Call waiting
Speed dialling
Call hold
Call forwarding
Caller ID
Conference call
Redialing
Anonymous call
Anonymous call rejection
Full duplex
Call return
Call transfer
Call history
SIP registrar server
Ports & interfaces
USB 2.0 ports quantity	2
Ethernet LAN (RJ-45) ports	2
RJ-9 ports quantity	2
Expansion module support
DC-in jack
Power
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
AC adapter output current	1.2 A
Power consumption (typical)	2.2 W
Power over Ethernet (PoE)
Weight & dimensions
Width	224.9 mm
Depth	206.2 mm
Height	174.9 mm
Package width	246 mm
Package depth	223 mm
Package height	120 mm

A well-equipped SIP phone for clear communication
The SIP-T43U IP phone is a feature-rich business tool for excellent communication and advanced functionality. It is a 12-line IP phone with a 3.7-inch black and white screen and EXP43 support. Combining Yealink OptimaHD voice technology and Opus wideband codec, the T43U offers excellent audio quality and crystal-clear voice communication. The phone feels faster and more responsive when performing calling functions. The T43U also offers Bluetooth, Wi-Fi, USB headset and USB recording function that you can use according to your needs. Yealink's new T4U series offers the same elegant look as the T4 series, but with improvements for greater interoperability and better collaboration.
• 9,4 cm ( 3,7 inch ) 360x160-pixel graphical LCD with
backlight
• Dual USB ports
• Dual firmware images
• Opus codec support
• T4U Auto-P template unified
• T4U firmware unified
• Up to 12 SIP accounts
• PoE support
• USB headset and EHS support
• Wi -Fi via WF40/WF50
• Bluetooth via BT40/BT41
• Supports color-screen expansion
modules
• Stand with 2 adjustable angles
• Wall mountable