Yealink SIP-T43U SIP Phone

The Yealink SIP-T43U is a 12-line IP phone designed to enhance business communication with crystal-clear audio, advanced connectivity, and extensive expansion options. Part of the T4U series, this model delivers a faster and more responsive interface compared to its predecessors, making it ideal for modern office environments. With high-definition voice technology, dual USB ports for flexible accessories, and support for multiple expansion modules, the SIP-T43U ensures efficient collaboration and streamlined call management for professionals.

Product Features

High-Quality Audio

Equipped with Yealink Optima HD Voice and the wideband Opus codec, the SIP-T43U provides superior audio clarity even under poor network conditions. Acoustic Shield and Smart Noise Filtering enhance call quality by reducing background noise, while the full-duplex speakerphone with Acoustic Echo Cancellation ensures smooth hands-free communication. The handset is hearing aid compatible (HAC) for accessibility.

Dual USB Ports

The phone features two USB 2.0 ports, enabling the connection of Bluetooth dongles (BT40/BT41), Wi-Fi adapters (WF40/WF50), USB headsets, or USB call recording devices. Each port supplies 5V / 500mA, supporting small peripheral devices for versatile communication setups.

Expansion Support

For advanced call handling, the SIP-T43U can connect to up to three EXP43 expansion modules. Each module adds a 4.3-inch color screen and up to 60 programmable keys, providing up to 180 additional buttons for complex workflows.

Display

A 3.7-inch graphical LCD with a resolution of 360×160 pixels and backlight offers clear navigation and easy access to menus and call information, ensuring a user-friendly interface.

Connectivity

Dual Gigabit Ethernet ports with Power over Ethernet (PoE) support enable high-speed network connections and simplify installation. The phone supports IPv4/IPv6, VLAN, LLDP/CDP, DHCP, and secure VPN access for enterprise-level networking.

Product Specifications

• SIP Accounts: Up to 12 accounts
• Line Keys: 8 keys with LED, programmable for up to 21 DSS keys (3-page view)
• Security: TLS 1.3, SRTP, OpenVPN, dual firmware images
• Conferencing: Supports 5-way conference calls
• Mounting: Stand with 2 adjustable angles; wall-mountable
• Audio Codecs: Wideband: AMR-WB (optional), Opus, G.722; Narrowband: PCMU (G.711µ), PCMA (G.711A), G.723.1, G.729, G.729A/B/AB, G.726, iLBC
• Voice Enhancements: Acoustic Shield, Smart Noise Filtering, full-duplex speakerphone with AEC
• Hardware: HAC handset
• Power Consumption: PoE 1.5W–3.2W; optional adapter 0.9W–2.2W
• Physical Dimensions: 224.9mm x 206.2mm x 174.9mm x 52mm
• Operating Temperature: -10°C to +45°C (14°F to 113°F)
• Provisioning: Zero Touch via Yealink RPS and Boot mechanism
• Directory Capacity: Local phonebook up to 1,000 entries; XML/LDAP remote phonebook support
• Expansion Module: Supports EXP43 (4.3″ screen, 60 keys per module)
• USB Port Usage: Upper port for Wi-Fi/Bluetooth, lower port for EXP43 module