More Information:
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38 programmable keys each with a dual-color LED
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Daisy-chain 6 modules for 228 programmable keys
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Dual color (red or green) LEDs for line status information
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Supports Busy Lamp Field(BLF), Bridge Line Appearance(BLA)
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Programmable for speed dialing, call pickup, Intercom,hold, transfer, voicemail, forward, DND...
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Applies to Yealink IP Phone SIP-T28P and SIP-T26P
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Expansion module(<2) is powered by the host phone
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