The Grandstream 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 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 solution for businesses and receptionists managing high call volumes, the GBX20 ensures maximum productivity by efficiently monitoring and dispatching incoming calls.

• Lines: 20 per page (each module contains 2 pages, for up to 40 lines per module, Up to 160 with 4 daisy-chained modules
• Compatible Grandstream Phones: GRP2615, GXV3350
• Graphic Display: 4.3 inch (272x480) TFT color LCD
• Power: A single GBX20 can be powered by host phone (GRP2615 or GXV3350); when 2 or more GBX20 are connected the included 12V/1A PSU will power the GBX20s

• Feature Support: Local GUI: Multiple line/call appearances
• Firmware Upgrades: GBX20 firmware is upgraded by direct network download through host phone (GRP2615 or GXV3350)’s network connection and firmware upgrade setup.
• Operating Temperature: 0°C to 40°C
• Operating Storage: -10°C to 60°
• Humidity: 10% to 90% Non-condensing
• Compliance: FCC: Part 15 Class B

(1) GBX20 Extension Board

(1) GBX20 Extension Board Stand

(1) Extension Board Connector Plate

(1) TypeA-MicroB USB Cable

(1) 12V/1A Power Adapter

(1) Screw

(1) Quick Installation Guide