... many conference work mode: Free, FIFO (1-9 microphone unit), Limit (1-9 microphone unit).4. Main unit has following features when ... and other equipments a. Manage the meeting with software, support double screen display b. Voting function (yes, no abstain) c. Electing ... mode: Free mode, FIFO mode (1-9 microphone unit), Limit mode (1-9 microphone unit)7. With the port for Telephone interface ...