Yealink EXP38 38‑Key Programmable Expansion Module – DSS/BLF Console for Yealink IP Phones

Yealink EXP38 – Specifications

General / Purpose

• Device type: Expansion module (sidecar) for compatible Yealink IP phones (e.g., SIP‑T28P, SIP‑T26P, SIP‑T29G, SIP‑T32G, SIP‑T38G)

• Designed to provide additional programmable keys for power users, receptionists, call centers, and operators

Keys & Buttons

• Number of programmable buttons: 38

• Dual-color LED indicators per button for status (line busy, free, call, etc.)

• Supports functions like speed-dial, BLF (busy-lamp field), BLA (bridged-line appearance), call pickup, intercom, hold, transfer, call forward, voicemail, DND, call park/pickup, etc.

Expandability & Capacity

• Up to 6 EXP38 modules can be daisy-chained on one IP phone, giving up to 228 programmable keys total

• Additional power supply may be required when using more than 2 modules; up to 2 modules can draw power from host phone

Connection / Physical / Installation

• Interfaces: 2 × RJ-12 ports for data in/out (link to phone / next module)

• Mounting: Desk stand; modules chained in series to host phone via cable

• Power: External 5 V/1.2 A supply may be needed for multiple modules

• Dimensions / Weight: Approx. 132 × 143 × 42 mm, weight ~255 g

Use Cases

• Ideal for reception desks, call center operators, administrators, or users needing fast access to many lines or extensions

• Monitors many busy lines (BLF/BLA) and provides quick one-touch call control in high-volume environments

• Enhances IP phones into multi-line console stations without additional hardware

Lifecycle Note

• End-of-life (EOL) product — may no longer be produced but still operational and supported by distributors