Expansion Module for GXV3350, GRP2615, GRP2624, 20 dual-colored extension keys and 2 arrow keys for page switching (allowing each GBX20 to support up to 40 contacts/extensions.) Connect up to 4 GBX20

The GXB20 model is an expansion module that increases the functionality, versatility and flexibility of the operator-class IP phones of the GRP2615 model and the IP video phones of the GXV3350 model from Grandstream. It is equipped with an LCD screen of 272x480 pixels, allows you to use up to 40 contacts per module (using 4 modules provides support for up to 160 contacts). The GXB20 has support for a wide range of call functions including BLF, Parking/answering a call, Speed dial, Presence, Intercom, voice conferencing, call forwarding/ translation and much more. GBX20 is an ideal business solution for processing a large volume of calls, which, thanks to effective management and control over incoming calls, ensures maximum performance