Features: 1) Min.: 104 2) Max.: 108 3) Multiple communication line: 1 4) Normal transform power 5) Power failure transfer 6) External line caller ID 7) Auto-attendant (DISA-12s one paragraph) 8) Outgoing message recording 9) Internal music on holding 10) Auto / operator mode 11) Flexible ext. no. assignment (optional) 12) Call duration control 13) Call pickup 14) Outgoing call transfer 15) Call transfer 16) Do not disturb 17) Ringing assignment 18) Call restriction 19) Three-way conference