Grandstream GBX20 Extension Module with 4.3-inch Color LCD

The Grandstream GBX20 is a sidecar key module with 20 dual-color keys per page and a 4.3-inch color screen, giving 40 contacts per unit. It is built for switchboard and reception staff on a GRP2615, GRP2650, GRP2670 or GXV3450 phone.

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The Grandstream GBX20 is an extension module that gives a compatible phone 20 dual-color keys per page and its own 4.3-inch 480x272 color screen, so every name and line status is readable at a glance. Two pages per module mean 40 contacts, and you can daisy-chain up to 4 modules for 160.

Which phones take the Grandstream GBX20

Grandstream lists these hosts:

• GRP2600 phones: GRP2615, GRP2624, GRP2650 and GRP2670.
• Video phones: GXV3350 and GXV3450.

Installation and power

A connector plate screws across the backs of the phone and the module, and the supplied USB cable runs to the phone's EXT port. On a GRP2615 or GXV3350, one module draws power from the phone; with two or more, the datasheet calls for a 12 V power supply. Keys are set from the phone's web interface, and module firmware updates over the phone's network connection.

Where it fits

Picture a hospital switchboard in Riyadh watching every department, or a Makkah hotel front desk sending calls to rooms and managers with one press. Each key can run BLF, call park and pick-up, speed dial, intercom, presence or transfer.

GBX20 or GXP2200EXT?

Both offer 20 keys over 2 pages and chain up to 4 units. The GBX20 adds a 4.3-inch color screen, connects by USB and serves GRP2600 and GXV3350/GXV3450 phones. The GXP2200EXT has a 128x384 graphic LCD, uses an RJ11 cable and works with the GXP2140 and GXP2170. Pick the one that matches your phone.

Frequently Asked Questions

Does the GBX20 work with a GRP2634 or GRP2636?

No. The official list covers the GRP2615, GRP2624, GRP2650, GRP2670, GXV3350 and GXV3450 only.

Does the GBX20 need a power adapter?

On a GRP2615 or GXV3350, a single module is powered by the phone. With two or more modules, the datasheet calls for a 12 V power supply.

Can I fit a GBX20 to a GXP2170?

No. The GXP2140 and GXP2170 use the GXP2200EXT; the GBX20 is for the listed GRP2600 and GXV phones.

Specifications

• Model: GBX20
• Type: Extension module for IP phones
• Display: 4.3-inch 480x272 TFT color LCD
• Keys: 20 programmable keys with dual-color LED, plus 2 arrow keys for page switching
• Lines per module: 20 per page, 2 pages, up to 40 per module
• Daisy chain: Up to 4 modules, 160 in total
• Key functions: BLF (standard or eventlist), BLA/SCA, call park/pick-up, speed dial, presence, intercom, conference/transfer/forward
• Compatible phones: GRP2615, GRP2624, GRP2650, GRP2670, GXV3350, GXV3450
• Connection: USB cable to the phone's EXT port, with a screw-fixed connector plate
• Power: Single module powered by the host phone on GRP2615 or GXV3350; 2 or more modules need a 12 V PSU
• Firmware upgrade: Direct network download through the host phone
• Dimensions: 210 x 124 x 33.5 mm
• Weight: Unit 360 g, package 700 g
• Operating / storage temperature: 0 to 40°C operating, -10 to 60°C storage
• Humidity: 10% to 90% non-condensing
• Compliance: FCC Part 15 Class B; IC ICES-003; CE: EN 55032, EN 55035, EN 61000-3-2, EN 61000-3-3, EN 62368-1; RCM: AS/NZS CISPR32, AS/NZS 62368.1
• Package contents: GBX20 extension board, base stand, connector plate, screws, USB cable, quick installation guide

Features

• 4.3-inch 480x272 TFT color screen: names and status are shown on the module, no paper labels.
• 20 dual-color keys per page, 2 pages: 40 contacts or extensions from a single unit.
• Up to 4 daisy-chained modules: 160 keys to watch the whole building.
• 6 compatible hosts: GRP2615, GRP2624, GRP2650, GRP2670, GXV3350 and GXV3450.
• One module runs on GRP2615 or GXV3350 host power: a 12 V supply is only needed from the second module onward.