The SIP-T43U IP phone is a feature-rich business tool that provides excellent communications as well as extended functionality. It is a 12-line IP phone with a 3.7-inch black-and-white screen and EXP43 support.

The T43U provides superb audio quality and crystal-clear voice communications by combining Yealink Optima HD Voice technology and Opus's wideband codec. When performing call features, the phone feels faster and more responsive. Furthermore, the Yealink T43U includes dual USB ports in a phone, enabling Bluetooth, Wi-Fi, a USB headset, and USB recording. Which you can use any two of freely depending on your needs. The T4U series has the same elegant appearance as the T4 line, with improvements for greater interoperability and collaboration.