GXP2200EXT-Extension-Module
Specifications:
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128x384 backlit LCD display
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20 programmable dual-color buttons per module, 2 pages per module (40 contacts total)
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BLF/speed dial
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Daisy-chain up to 4 modules for up to 160 contacts/extensions
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LA (bridged line appearance)/SCA (shared call appearance), BLF (busy lamp field, standard or eventlist), Call Park/Pick-up, Speed Dial, Presence, Intercom, and conference/ transfer/forward and more