Product Overview
The Yealink EXP43 Expansion Module is designed to enhance the productivity and efficiency of Yealink T4U Series IP Phones by providing a rich, easy-to-navigate interface and extended programmable key capacity. Compatible with the Yealink T43U, T46U, and T48U, the EXP43 automatically adapts its display to match the connected phone: monochrome for the T43U and full color for the T46U/T48U.

With 20 physical keys, each supporting dual-color LEDs, and additional keys accessible via dedicated page view buttons, the EXP43 offers up to 60 programmable keys per module. By daisy-chaining up to three expansion modules (note: modules 2 and 3 require external power), users can expand their system to an impressive 180 programmable BLF keys.

This makes the EXP43 the ideal accessory for receptionists, switchboard operators, and power users, enabling faster call handling and advanced call management.

Key Features

• 4.3” color LCD display (272 × 480 pixels)

• 20 physical keys with dual-color LED indicators

• 40 additional keys accessible via page view buttons

• Dedicated navigation keys for quick access to multiple pages

• Expandable up to 3 modules per phone (two require PSU for power)

• Compatible phones: Yealink T43U, T46U, T48U

• Adjustable stand for flexible desk placement

Benefits

• Enhanced productivity – Quickly manage calls, extensions, and functions with one-touch keys

• Scalable solution – Expand from 20 to 180 programmable BLF keys across three modules

• Smart adaptation – Color or monochrome interface matches the connected IP phone model

• Streamlined operations – Ideal for reception, switchboard, or high-call-volume users

• Easy integration – First expansion module powered directly by the host phone