The GBX20 is an Extension Module that adds functionality, versatility and flexibility to Grandstream’s
GRP2615, GRP2624, GRP2650 & GRP2670 Carrier-Grade IP Phone and GXV3350 & GXV3450 IP Video Phone.
It features a 272x480 LCD display that offers up to 40 contacts per module with support for up to 160
contacts by using 4 modules. The GXB20 supports a wide-range of advanced call features including BLF,
call park/pick-up, speed-dial, presence, intercom, voice conferencing transfer/forward and much more. An
ideal solution for businesses and receptionists managing high call volumes, the GBX20 ensures maximum
productivity by efficiently monitoring and dispatching incoming calls.