1. FSK/DTMF CID.  2. Transferred CID 3. Doorphone Interface.  4. Elegant fashion Design.  5. Ringing Pattern for different calls.  6. Flexible call setting: Toll Restriction/limited call Duration / Auto-attendant / Call Forwarding /  Call pick-up.  7. Communication Paths No block.  8. Memory protect in case of power failure.  9. Remote programming service.