Yealink EXP20 LCD Expansion Module – 20-Key Programmable Sidecar for SIP-T27/T29 IP Phones

Yealink EXP20 – Specifications

General / Purpose

• Device type: LCD expansion module for IP phones

• Designed to extend functionality of supported Yealink IP phones (e.g., SIP‑T27G, SIP‑T27P, SIP‑T29G)

• Ideal for users who manage high call volumes, such as receptionists, admin staff, and call centers

Display & Keys

• Graphic LCD screen: 160 × 320 pixels, backlit

• 20 physical programmable keys with dual-color LEDs

• Supports page-switch for additional keys — up to 38 buttons with multiple pages

• Supports daisy-chaining of up to 6 expansion modules for extended line capacity

Functionality / Use Cases

• Programmable keys support common PBX/VoIP functions: speed-dial, BLF (Busy Lamp Field), BLA (Bridged Line Appearance), call forwarding, transfer, hold, call park/pick-up, etc.

• Ideal for fast access to many lines or extensions in reception desks, contact centers, and multi-line operator setups

Physical & Installation

• Adjustable stand for ergonomic desktop placement

• Connection via RJ12 cable to compatible Yealink IP phone

• External power supply required if more than two modules are used

• Operating environment: temperature –10 °C to +50 °C; humidity 10%–95% non‑condensing

Limitations / Notes

• Cannot operate standalone — must be connected to a supported host phone

• End-of-Life product — newer expansion module types recommended for long-term use