GRANDSTREAM GBX20 – Extension Module

• 4.3 inch (272×480) 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

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