Grandstream GBX20 Extension Module
The Grandstream GBX20 is a backlit LCD extension module providing 20 programmable dual‑color keys (up to 40 per module with paging) for BLF, speed‑dial, call park/pick‑up, intercom, presence, and transfer/forward, expandable to 160 contacts with up to four modules — compatible with select Grandstream GRP and GXV series IP phones.
Description
Grandstream GBX20 — 4.3″ LCD Extension Module with 20 Programmable Keys & BLF for GRP & GXV Phones
Key Features:
4.3″ Color LCD: 272×480 TFT display with backlight for clear visibility of contacts and labels.
20 Programmable Keys: Dual‑colored keys with two pages per module (up to 40 contacts per module).
Expandable Contacts: Daisy‑chain up to 4 GBX20 modules for up to 160 total contacts/extensions.
Advanced Call Features: BLF (Busy Lamp Field), speed‑dial, presence, call park/pick‑up, intercom, conferencing transfer/forward, and more.
Easy Navigation: Arrow keys to switch between pages of programmable keys.
Compatible Phones: Works with GRP2615, GRP2624, GRP2650, GRP2670 carrier‑grade phones and GXV3350/GXV3450 Android IP video phones.
Flexible Installation: Modules can be stacked (daisy‑chained) and draw power from host phones where supported.
Enterprise Use: Ideal for reception desks, call centers, executive consoles, or any deployment needing rapid call control.
Technical Specifications:
Display: 4.3″ (272×480) backlit color TFT LCD.
Programmable Keys: 20 keys per module with two pages (up to 40 contacts per module).
Expansion Capacity: Up to 160 contacts/extensions with four GBX20 modules daisy‑chained.
Supported Features: BLF, speed‑dial, presence, call park/pick‑up, intercom, call transfer/forward, shared call appearance.
Compatibility: GRP2615, GRP2624, GRP2650, GRP2670, GXV3350, GXV3450.
Power: A single module can be powered by the host phone; adding multiple modules may require a 12V/1A PSU (depending on host phone support).
Connectivity: Daisy‑chain connection between modules and host phone.
Technical Datasheet
You can download the full technical documentation for this product from the link below:
Download PDF Datasheet
