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IP Phones and Terminals / Grandstream

GBX20

The GBX20 is an expansion module designed to enhance the monitoring and management capabilities of multiple extensions, contacts, and BLF functions on professional-grade IP phones. It is ideal for reception areas, operations centers, and users handling a high volume of calls.

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GBX20

Main features

  • 4.3” Color TFT LCD Screen
  • 20 Dual-Color Programmable Keys
  • 2 Navigation Keys (allows 2 pages → 40 contacts per module)
  • Supports up to 4 daisy-chained modules (160 contacts/extensions)
  • Functions: BLF, Speed ​​Dial, Intercom, Call Park/Pick-up, Presence, Transfer, Call Forwarding, Conference Calling
  • Powered by host phone (1 module) or external power source (≥2 modules)
  • Compatible with Grandstream high-end and carrier-grade models

Technical specifications

type

Extension module

Screen

4.3” TFT LCD (272×480)

Keys

20 programmable + 2 navigation

Total capacity

Up to 40 contacts per module

Expansion

Up to 4 modules (160 contacts)

Features

BLF, speed-dial, pick-up, presence, intercom, etc.

Feeding

From phone or external adapter

Compatibility

Compatible Grandstream phones

About the brand

Grandstream develops unified communications solutions for corporate environments. Modules like the GBX20 expand telephone management capabilities, optimizing the productivity of operators and administrative staff with high communication workloads.

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