The Microphone is highly directional and on an easily adjustable stand, and has low microphonics. The NIR optical data transceiver is a omnidirectional ceiling mounted array. The communications protocol should be a standard, e.g., IRID. . RS-232 serial port. . The Internet. .
Volume control selects individual listen volume.
Microphone volume or Gain is automatic. . Request to Talk is sent. Request to Talk is acknoledged. Talk port is open. . Time to speak.