Grandstream GBX20 Color LCD Expansion Module

The Grandstream GBX20 is an expansion module designed to enhance call management capabilities on selected Grandstream IP phones. It features a 4.3-inch color TFT LCD screen with a resolution of 272 x 480 pixels, allowing users to view line and call status via a local graphical interface. Each module supports 20 lines per page, distributed across two pages, facilitating direct control of up to 40 lines per unit.

This device is powered by the host phone when used individually, while it requires an external power source when multiple modules are connected in series. Its firmware updates automatically through the receiving phone's network. The GBX20 operates in a temperature range of 0 °C to 40 °C and includes a support base and connection plate. The device dimensions are 210 x 124 x 33.5 mm and its weight is 360 g.

• 4.3-inch color TFT LCD screen
• Management of up to 40 lines per module
• Powered by host phone or external power source
• Firmware updates via network
• Dimensions of 210 x 124 x 33.5 mm