The OBi1022 is a business-class color IP phone with support for up to 10 lines and up to six (6) SIP, Google Voice VoIP accounts and one OBiTALK VoIP service. Use OBi Wi-Fi to connect the OBi1022 to your wireless access point. Use OBiBT to connect a Bluetooth headset or configure a line key that"s paired to your mobile phone. OBiLINE not supported. Features: Multi-Line / Multiple Calls Bridged Line Appearances Busy Lamp Field (BLF) - Regular, Pick-up, Speed Dial On-Hook Dialing Caller ID - Name, Number, Photo Call Waiting, Call Queued Distinctive Ringtones Based on Who is Calling Auto Answer Intercom Call, Page Call Page Groups (2) Call Hold Music on Hold Call Swap Call Park and Call Un-park Call Pick-Up - Selective and Group Message Waiting Indication - Visual, Tone Based Speed Dialing by of 99 OBi Endpoints, Buddies or Numbers (E.164 or URI) Call Logs - Dialing from Logs Personal Phone Book - Entries with Multiple Numbers, Photo, Grouping Hot Line, Warm Line Calling 4-Way Conference Calling w Local Mixing Call Forward Unconditional Call Forward Busy Call Forward No Answer Call Transfer - Blind, Attended Anonymous Call Block Anonymous Call Do Not Disturb - Do Not Ring Call Return - Call Back on Busy Repeat Dialing Immediate Divert Multiple Ringtones - Upload Custom Ringtones Screen Saver - Upload Screen Saver with Slideshow Secure Encrypted Voice Communication Independent Mic and Speaker Vol Adjustment: Speaker, Handset, 3.5mm Headset