Enhance your business phone system with the Grandstream GBX20 LCD Extension Module, a premium, scalable solution crafted for high-demand call management. Grandstream GBX20 is featuring a vivid 4.3-inch (480×272) color LCD display, the GBX20 offers 20 dual-colored programmable keys per page, with two navigation keys providing access to up to 40 contacts/extensions per module.
For businesses and front-desk professionals handling heavy call traffic, the Grandstream GBX20 supports up to 4 modules daisy-chained together, allowing a total of 160 programmable extensions at your fingertips. Each key is fully customizable to manage Busy Lamp Field (BLF) status, speed dial, call pick-up, call park, intercom, voice conferencing, call forwarding, and more — ensuring efficient, real-time communication handling.
This versatile extension module integrates seamlessly with Grandstream GRP2615, GRP2624, GRP2650, GRP2670 carrier-grade IP phones, and GXV3350 and GXV3450 video IP phones. Powered conveniently by the host phone for a single module setup or via an included 12V PSU when multiple modules are connected, the GBX20 guarantees reliability in even the busiest environments.
Firmware updates are hassle-free, managed directly through the host phone’s network connection, while compliance with FCC, CE, IC, and RCM certifications ensures robust, interference-free operation. Compact yet powerful, the GBX20’s durable design includes a lightweight frame (360g) and professional-grade build, making it ideal for any desk or reception setup.
Grandstream GBX20 is designed for environments requiring advanced call routing, monitoring, and quick-response capabilities, the Grandstream GBX20 LCD Extension Module delivers a streamlined communication experience, helping businesses maximize productivity and operational efficiency.

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