The GXB20 is an Extension Module that adds functionality, versa tility 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 confer encing transfer/forward and much more. An ideal solution for businesses and receptionists managing high c all volumes, the GBX20 ensures maximum productivity by efficiently monitoring and dispatching incoming calls.

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