A Well-Rounded SIP Phone for Clear Communications
The SIP-T43U IP phone is a feature-rich business tool for excellent communications and extended functionality. It is a 12-line IP phone that comes with a 3.7-inch large black-and-white screen and the EXP43 support. United Yealink Optima HD Voice technology and wideband codec of Opus, the T43U awards you the superb audio quality and crystal-clear voice communications. The phone feels quicker and more responsive when performing call features. Moreover, the T43U puts dual USB ports in a phone that makes Bluetooth, Wi-Fi, USB headset and USB recording come true, and you can use any two of them freely according to your needs. The Yealink new T4U series offers the same elegant appearance as the T4 line, but with improvements for greater interoperability and better collaboration.

Easy Customization and High Expansibility
Accompanied by two USB ports, the T43U is your right-hand man in the office that makes Bluetooth, Wi-Fi, USB headset and USB recording possible, and you can use any two of them freely according to your needs to enrich phone features. Meanwhile, the phone not only has three pages of flexible buttons that can be easily programmed with 21 paperless DSS keys at most, but also can connect up to three expansion modules, for up to 180 additional buttons with a screen-based LCD display and LED system.

HD Audio
Yealink Optima HD Voice technology combines cutting-edge hardware and software with wideband technology for maximum acoustic performance. Being a totally open, highly versatile audio codec, Opus, is designed to perform a higher HD audio quality than other wideband codecs in a high network bandwidth; However, if your current network quality is poor, Opus can provide you with a better audio quality than other narrowband codecs. And its hearing aid compatible (HAC) handset helps the person who is with hearing loss to hear the voice more clearly.

Efficient Installation and Provisioning
Yealink T4U series supports efficient provisioning and effortless mass deployment with Yealink’s Redirection and Provisioning Service (RPS) and Boot mechanism to help you realize the Zero Touch Provisioning without any complex manual settings, which makes the T4U series simple to deploy, easy to maintain and upgrade. Furthermore, a unified firmware and auto-p template that applies to all T4U phone models, saves even more time and costs for businesses, as well as simplifies the management and maintenance.

Secure Transport and Interoperability
Yealink T4U series uses SIP over Transport Layer Security (TLS/SSL), which is the latest network security technology. It’s also compatible with leading soft switch suppliers, such as 3CX, Broadsoft Broadworks. Moreover, it is carried with dual fimrware images that gives you a enterprise-level protection to avoid bricking your system once upgrade failed.

Specification

Product
Product id	816487
Brand	Yealink Network Technology
Partnr	SIP-T43U
EAN/UPC code	6938818304284
Technical details
Expansion module support	Y
Ethernet cable	Y
Speakerphone	Y
Display
Display	LCD
Display resolution	360 x 160 Pixels
Display diagonal	3.7 inch
Backlight display	Y
Touchscreen	N
Phone features
Answering machine	Y
Lines quantity	12 regels
Caller ID	Y
Redialing	Y
Conference call	Y
Call forwarding	Y
Call hold	Y
Speed dialling	Y
Number of VoIP accounts	12
Call return	Y
Call waiting	Y
Call transfer	Y
Phonebook capacity	1000 entries
Call history	Y
SIP registrar server	Y
Anonymous call	Y
Anonymous call rejection	Y
Full duplex	Y
Audio
Voice codecs	AGC, AJB, AMR-NB, AMR-WB, G.711Mu, G.711a, G.723.1, G.726, G.729ab, OPUS, PLC, VAD, iLBC
Comfort noise generation (CNG)	Y
Packet loss concealment (PLC)	Y
Network
Bluetooth	Y
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN	Y
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP/TFTP/HTTP/HTTPS, IPv6, LLDP/CDP/DHCP VLAN
Wi-Fi	Y
Quality of Service (QoS) support	Y
Bluetooth version	4.1
DHCP client	Y
Syslog	Y
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ports & interfaces
Ethernet LAN (RJ-45) ports	2
USB 2.0 ports quantity	2
RJ-9 ports quantity	2
DC-in jack	Y
Power
AC adapter input voltage	100 - 240 V
Power over Ethernet (PoE)	Y
Power consumption (typical)	2.2 W
AC adapter output voltage	5 V
AC adapter output current	1.2 A
Design
Product type	IP phone
Handset type	Wired handset
Wall mountable	Y
Mounting	Desk/Wall
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
Performance
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Hearing aid compatibility	Y
Management features
Plug and Play	Y
Colour
Product colour	Grey
Microphone
Microphone mute	Y
Operational conditions
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 procent
Certificates
Sustainability compliance	Y
Sustainability certificates	REACH, RoHS
Packaging content
Mounting kit	Y
Number of handles included	1 stuk(s)
Quick start guide	Y
Handset	Y
Logistics data
Harmonized System (HS) code	85171800