Description
Yealink EXP38 – Specifications
General / Purpose
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Device type: Expansion module (sidecar) for compatible Yealink IP phones (e.g., SIP‑T28P, SIP‑T26P, SIP‑T29G, SIP‑T32G, SIP‑T38G)
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Designed to provide additional programmable keys for power users, receptionists, call centers, and operators
Keys & Buttons
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Number of programmable buttons: 38
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Dual-color LED indicators per button for status (line busy, free, call, etc.)
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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
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Up to 6 EXP38 modules can be daisy-chained on one IP phone, giving up to 228 programmable keys total
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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
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Interfaces: 2 × RJ-12 ports for data in/out (link to phone / next module)
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Mounting: Desk stand; modules chained in series to host phone via cable
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Power: External 5 V/1.2 A supply may be needed for multiple modules
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Dimensions / Weight: Approx. 132 × 143 × 42 mm, weight ~255 g
Use Cases
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Ideal for reception desks, call center operators, administrators, or users needing fast access to many lines or extensions
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Monitors many busy lines (BLF/BLA) and provides quick one-touch call control in high-volume environments
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Enhances IP phones into multi-line console stations without additional hardware
Lifecycle Note
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End-of-life (EOL) product — may no longer be produced but still operational and supported by distributors
