Yealink EXP39 20 physical keys each with a dual-color LED

Yealink EXP39 – Specifications

General / Purpose

• Device type: LCD expansion module (“sidecar”) for supported Yealink IP phones (e.g., SIP‑T26P, SIP‑T28P, SIP‑T38G)

• Provides additional programmable keys / line monitoring / speed-dial / BLF / BLA / feature-button capacity for heavy call-volume users (receptionists, call centers, operators)

Display & Keys

• Graphic LCD: 160 × 320 pixels

• Physical keys: 20 keys with dual-color LED indicators (status: free / busy / ringing / etc.)

• Page-switch support: enables additional 20 “soft-keys,” giving up to 40 programmable keys per module

• Daisy-chain support: up to 6 EXP39 modules can be chained to a single phone — up to 240 programmable keys total

Functionality / Supported Features

Each programmable key can be assigned to:

• Speed-dial / Hotline / Direct call

• Busy Lamp Field (BLF) / Bridge Line Appearance (BLA)

• Call pickup, call park/pick-up, intercom, hold, transfer, call forward, voicemail / message indication, DND, and other standard PBX/VoIP call-control features

Connection & Power / Physical

• Connectivity: 2 × RJ12 ports — one to connect to the phone, one to next module in chain

• Power: up to 2 modules can be powered by the host phone; if more modules are used, an external power adapter is required

• Weight: approx. 290 g

• Designed for desk placement beside a compatible IP phone

Intended Users / Ideal Use Cases

• Reception desks, switchboards, front-desk operations

• Call centers, helpdesks, support desks needing monitoring of many lines/extensions/trunks

• Administrative staff needing quick access to multiple extensions

• Busy office environments where one-touch call control improves productivity

Product Status / Notes

• End-of-Life (EOL) product — may no longer be produced but still usable with supported phones

• Verify firmware/software compatibility with host phone before deployment