30 programmable keys each with a dual-color LED Daisy-chain 5 modules for 150 programmable keys Dual color (red or green) LEDs for line status information Supports Busy Lamp Field (BLF), Presence Programmable for speed dialing, call pickup, Intercom, hold, transfer, voicemail, forward, DND… - Expansion module (<2) is powered by the host phone
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