The GBX20 is a high-performance extension module that adds functionality, versatility, and flexibility to Grandstream GRP2615 and GRP2624 IP phones.

GBX20 Extension Module

Key Features & Specifications

  • Color Display: 4.3-inch (272x480) TFT color LCD display.
  • Keys & Pages: 20 dual-color physical keys with 2 page keys for up to 40 programmable digital extensions per module.
  • Daisy-Chain: Daisy-chain up to 4 GBX20 modules to a single host phone for up to 160 extension keys.