The Grandstream GBX20 Extension Module enhances supported IP and video phones with expanded call management capabilities, making it ideal for busy receptionists and teams handling large call volumes. It features a vivid color LCD and supports up to 160 contacts when chained with additional modules, delivering efficient call handling and streamlined communication.

• 4.3" TFT color display with 272x480 resolution

• Displays up to 40 contacts/extensions per module across two pages

• Supports daisy-chaining up to 4 modules for a total of 160 contacts

• Enables advanced features like BLF, speed dial, intercom, call park/pick-up, and transfer

• Designed for seamless integration with GRP26xx series and GXV33xx video phones