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Grandstream GBX20 Expansion 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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Grandstream GXP2200EXT LCD Extension Modue
- 128×384 backlit LCD display
- 40 contacts on 20 programmable dual-color buttons per module
- Daisy-chain up to 4 modules for up to 160 contacts/extensions
- BLF (busy lamp field, standard or eventlist) Call Park/Pick-up, Speed Dial, Presence, Intercom, and conference/ transfer/forward and more