6 Vo IP accounts, Hotline, Emergency call Call hold, Call waiting, Call forward, Call return Call transfer (blind/semi-attended/attended) Caller ID display, Redial, Mute, DND Auto-answer, 3-way conferencing Speed dial, SMS, Voicemail Message Waiting Indication (MWI) LED Tone scheme, Volume control Direct IP call without SIP proxy Ring tone selection/import/delete Phonebook (1000 entries), Black list Call history: dialed/received/missed/forwarded Menu-driven user interface Localized language & input method Soft keys programmable Supports up to 6 expansion modules (EXP39) Supports Wireless Headset Adapter (EHS36