The GBX20 is a backlit LCD extension module supported by the GXV3350 and GRP2615. The module includes 20 dual-colored extension keys and 2 arrow keys for page switching. Connect up to 4 GBX20 modules to compatible Grandstream phones for a total of 160 contacts/extensions.

The GBX20 is an Extension Module that adds functionality, versa tility and flexibility to Grandstream’s GRP2615 Carrier-Grade IP Phone and GXV3350 IP Video Phone. It f eatures a 272x480 LCD display that offers up to 40 contacts per module with support for up to 160 contact s 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 sol ution for businesses and receptionists managing high call volumes, the GBX20 ensures maximum productiv ity by efficiently monitoring and dispatching incoming calls. 

Product Highlights: 

• 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