Extension Module
GBX20

The GBX20 is an Extension Module that adds functionality, versatility and flexibility to Grandstream’s GRP2615 Carrier-Grade IP Phone and GXV3350 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 GBX20 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. 

Features
•4.3 inch (272x480) TFT color LCD
•20 per page (each module contains 2 pages, for up to 40 lines per module
•Combine up 4 daisy-chained modules for 160 contacts/extensions
•BLF, call park /pick-up, speed-dial, presence, intercom, voice conferencing transfer/forward and more