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