Grandstream GBX20 Extension Module

: In stock

: Grandstream

Regular price $149.00


The Grandstream GBX20 is an Extension Module that adds functionality, versatility and flexibility to GRP2615 and GXV3350 IP Phones. The GBX20 features a 272x480 LCD display, offers up to 40 programmable buttons, and 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.



·       20 line keys with dual color LED

·       40 programmable buttons (2 pages, 20 per page)

·       Programmable buttons can be used for BLF, call park/pick up, speed dial, presence, intercom, conference, and transfer features

·       4.3 inch (272x480) TFT color LCD

·       Multiple line/call appearances

·       Firmware is upgraded by direct network download through host phone network connection and firmware upgrade setup



·       GRP2615 IP Phone

·       GXV3350 IP Phone

·       Up to 4 modules can be daisy chained per phone (for a total of 160 programmable buttons)

·       A single GBX20 can be powered by host phone; when 2 or more GBX20 are connected the included 12V/1A power adapter will power the GBX20s.


Package Contents

·       GBX20 extension module

·       Desk stand

·       Connector plate with screws

·       USB cable

·       12V power adapter





We provide FREE UPS Ground shipping on any online order over $99.  For online orders totaling less than $99, UPS Ground shipping is only $9.95.  The offer is valid in the continental United States.

The vast majority of our orders are shipped the same day as placed.  If there is any significant delay in your order leaving our warehouse, you will be contacted promptly by our customer service department.

We offer UPS Ground, UPS 3 Day Select, UPS 2 Day Air, UPS Next Day Air Saver, and UPS Next Day Air.


·           UPS Ground - 1-5 days depending on delivery distance (see Ground services map below)

·           UPS 3 Day Select – by 4:30 p.m. third business day to most US addresses

·           UPS 2 Day Air - by 4:30 p.m. second business day to most US addresses

·           UPS Next Day Air Saver - by 4:30 p.m. next business day to most US addresses

·           UPS Next Day Air - by 10:00 a.m. next business day to most US addresses



UPS Ground Services Map