A versatile SIP phone for clear communication
The SIP-T43U IP telephone is a versatile business device offering excellent communication and extensive functionality. It is a 12-line IP telephone, featuring a large 3.7-inch black-and-white screen and support for the EXP43. Thanks to the combination of Yealink Optima HD Voice technology and the Opus broadband codec, the T43U offers you excellent sound quality and crystal-clear voice communication. The phone feels faster and more responsive when using its calling functions. What’s more, the T43U has two USB ports, allowing you to use Bluetooth, Wi-Fi, a USB headset and USB recording. You can choose freely between these two ports, depending on your needs at any given time. Yealink’s new T4U series has the same elegant design as the T4 range, but with enhancements for better interoperability and collaboration.
Easy to customise and highly scalable
With its two USB ports, the T43U is your trusty office companion: it supports Bluetooth, Wi-Fi, a USB headset and USB recording, and you can freely combine any two of these features to suit your needs and expand the phone’s functionality. In addition, the telephone not only features three pages of flexible buttons that you can easily programme with up to 21 paperless DSS keys, but you can also connect up to three expansion modules to it, providing up to 180 additional buttons with an LCD screen and an LED system.
HD audio
Yealink’s Optima HD Voice technology combines advanced hardware and software with wideband technology to deliver optimum sound quality. Opus is a fully open, highly versatile audio codec designed to deliver better HD sound quality than other wideband codecs when network bandwidth is high; However, if your current network quality is poor, Opus still offers better sound quality than other narrowband codecs. And thanks to the hearing aid-compatible (HAC) handset, people with hearing loss can hear voices more clearly.
Efficient installation and commissioning
The Yealink T4U series supports efficient provisioning and effortless large-scale deployment thanks to Yealink’s Redirection and Provisioning Service (RPS) and its boot mechanism. This enables Zero Touch Provisioning without the need for complicated manual configurations, making the T4U series easy to deploy, maintain and upgrade. Furthermore, the standardised firmware and auto-P template, which apply to all T4U phone models, ensure that businesses save even more time and money, whilst making management and maintenance much simpler.
Safe transport and interoperability
The Yealink T4U series utilises SIP over Transport Layer Security (TLS/SSL), the latest technology in the field of network security. The series is also compatible with leading softswitch providers, such as 3CX and Broadsoft Broadworks. Furthermore, the series is equipped with two firmware images, providing you with enterprise-grade protection and ensuring your system remains operational even if an upgrade fails.
Specifications
Design
| Product type | IP telephone |
| Mobile phone model | Wired telephone |
| Product colour | Grey |
| For wall mounting | Yes |
| Assembly | Desk/wall |
Achievements
| Dual-Tone Multi-Frequency (DTMF) modes | In-band, Out-of-band, SIP-info |
| Compatibility with hearing aids | Yes |
Phone features
| Number of lines | 12 rules |
| Answering machine | Yes |
| Call on hold | Yes |
| Speed dial | Yes |
| Putting a call on hold | Yes |
| Call forwarding | Yes |
| Caller ID | Yes |
| Phone book capacity | 1,000 entries |
| Number of VoIP accounts | 12 |
| Telephone meeting | Yes |
| Call again | Yes |
| Anonymous phone call | Yes |
| Block anonymous calls | Yes |
| Full-duplex | Yes |
| Call back | Yes |
| Transferring a call | Yes |
| Call history | Yes |
| SIP registration server | Yes |
Management functions
Display
| Display | LCD |
| Screen diagonal | 9.4 cm (3.7") |
| Screen resolution | 360 × 160 pixels |
| Touchscreen | No |
| Backlit display | Yes |
Audio
| Loudspeaker | Yes |
| Mute the microphone | Yes |
| Audio codecs | AGC, AJB, AMR-NB, AMR-WB, G.711Mu, G.711a, G.723.1, G.726, G.729ab, OPUS, PLC, VAD, iLBC |
| Generating comfort noise (CNG) | Yes |
| Concealment of packet loss (PLC) | Yes |
Network
| Ethernet LAN | Yes |
| Type of Ethernet LAN interface | Gigabit Ethernet |
| Ethernet LAN data rates | 10, 100, 1000 Mbit/s |
| Wi-Fi | Yes |
| Bluetooth | Yes |
| Bluetooth version | 4.1 |
| Supported network protocols | FTP/TFTP/HTTP/HTTPS, IPv6, LLDP/CDP/DHCP VLAN |
| Support for Quality of Service (QoS) | Yes |
| DHCP client | Yes |
| Syslog | Yes |
| Network standards | IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af |
Gates and interfaces
| Number of USB 2.0 ports | 2 |
| Ethernet LAN (RJ-45) ports | 2 |
| Number of RJ-9 ports | 2 |
| Support for expansion modules | Yes |
| DC input | Yes |
Certificates
| Compliance with sustainability regulations | Yes |
| Certificates of conformity | REACH, RoHS |
Assets
| Power over Ethernet (PoE) | Yes |
| Input voltage of the mains adaptor | 100 - 240 V |
| Output voltage of the mains adaptor | 5 V |
| Output current of the mains adaptor | 1.2 A |
| Power consumption (average) | 2.2 W |
Working conditions
| Operating temperature (T-T) | -10 - 50 °C |
| Relative humidity during use (H-H) | 10 - 95% |
Weight and dimensions
| Width | 224.9 mm |
| Depth | 206.2 mm |
| Height | 174.9 mm |
| Width of the packaging | 246 mm |
| Depth of the packaging | 223 mm |
| Height of the packaging | 120 mm |
Contents of the pack
| Fitting kit | Yes |
| Ethernet cable | Yes |
| Mobile phone | Yes |
| Quick Start Guide | Yes |
| Number of handles supplied | 1 item(s) |
Logistics details
| HS code (Harmonised System) | 85171800 |
