Yealink EXP40 – LCD Expansion Module (20 Physical Keys with Dual-Color LEDs, 40 Programmable Keys, for SIP‑T46/T48 Series)

Yealink EXP40 – Specifications

Display & Interface

• Graphic LCD: 160 × 320 pixels, 16-level grayscale, backlit

• Supports two page views — allows switching between two sets of keys

• Desk stand with 2 adjustable angles; also wall-mountable

Keys & Programmable Functions

• 20 physical keys, each with a dual-color LED for status (busy / free / ringing / etc.)

• Two page views provide up to 40 programmable keys per module

• Two independent control keys for quick page switching

• Programmable functions include:

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

  • Speed-dial / Hotline / Direct call

  • Call transfer, call forward, call park / pick-up

  • Call hold, conference, voicemail / message waiting indicator, DND, shared-line, directory access

Connectivity & Expandability

• Two RJ12 ports (Data-IN and Data-OUT) to connect to a host phone or daisy-chain to another module

• Supports up to 6 chained modules on a single phone, giving up to 240 programmable keys

• Power: up to 2 modules powered by host phone; more than 2 require external 5 V / 1.2 A power supply

Physical & Environmental

• Dimensions: approx. 127 × 213 × 45 mm

• Operating temperature: -10 °C to +50 °C

• Operating humidity: 10% – 95% (non-condensing)

Compatibility

• Works with compatible Yealink IP phones that support external expansion modules (e.g., SIP‑T46S, SIP‑T46G, SIP‑T48S, SIP‑T48G)