Display - 4.3. Line Keys - 28 keys with LED. Daisy Chain - Can be daisy chained with the M680i for a combined total of up to 3 modules. Compatible Phones - Supported on the 6865i, 6867i and 6869i. Call Handling - Programmable keys support advanced features such as shared call appearance (SCA), busy lamp field (BLF) and Speed Dial. Power - Powered by the phone; no separate power adapter required.
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