GRANDSTREAM GBX20 Network Extension Module Installation Guide
Learn about the GBX20 Network Extension Module and how it enhances functionality, versatility, and flexibility for Grandstream's compatible phones (GRP2615, GRP2624, and GXV3350). With a large color LCD and programmable buttons, the GBX20 is perfect for office receptionists or high call volume environments. Don't miss out on its call features such as BLF and conference/transfer/forward.