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Overview

About the Grandstream GBX20

The GBX20 is a backlit LCD extension module supported by the GRP2615, GRP2624, GRP2650, GRP2670 carrier-grade IP phones as well as GXV3350 and GXV3450 IP video phones. The module includes 20 dual-colored extension keys and 2 arrow keys for page switching (allowing each GBX20 to support up to 40 contacts/extensions.). 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, versatility and flexibility to the GRP2615, GRP2624, GRP2650, GRP2670 carrier-grade IP phones as well as GXV3350 and GXV3450 IP video phones. 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.

Key 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
  • Busy Lamp Field
  • Call forwarding
  • Call transfer
  • Call queue
  • Support & Resources
  • FAQ
  • Find answers to all your questions
  • Forums

Firmware

GBX20 firmware

Grandstream's official firmware images, hosted by smplVoice. Release notes list what each build fixes and adds. Not sure which build your phones need? The Tech Team™ can update them for you.
VersionFiles
1.0.1.12

Need help with your GBX20?

Tell us a little about your business and a voice specialist will reach out to talk it through.

  • A plan built around how your team actually works
  • Help moving your existing phone numbers
  • Setup and ongoing support from The Tech Team™
Or call (800) 943-7675

Grandstream and Grandstream product names are trademarks of Grandstream Networks, Inc. Product information, images and documents are published by Grandstream (source) and provided here for reference by smplVoice. Firmware and documents are Grandstream’s original, unmodified files.