- 4-line office phone with digital answering system and auto attendant - Supports up to 15 UP406 extention desksets - System can be expanded to support up to 16 stations total (15 desksets + 1 console). Add cordless accessories (handsets and headsets) as needed - Speakerphone that can keep up with your calls - Increase participation by allowing parties on both ends to speak and be heard at the same time