The FS-200’s all in one design replaces the need for a separate microphone mixer and speaker amplifier. There are a few simple calibration adjustments to be set during installation. The user adjusts the incoming audio levels from the remote control supplied with the telephone interface and video-conferencing system. All microphones may be muted through the codec or the telephone interface. The audience ceiling or table microphones may also be muted through the FS-200 while a presentation microphone (line input) remains active with expands microphone and speaker coverage areas and also provides ceiling based solution eliminating need for cables on the table or floor. The Pre-engineered field tested solution, and gives comfortable listening levels to the near and far ends.Easy set up and calibration procedure,here having the problem free operation it permits selection of a video conference or an audio conference with a telephone interface.The Line level connection for lapel, podium, or other types of presentation microphones, or program audio source.Record jack is also provided