Problem Cause and SolutionYou hear audio feedback. • The microphone is too close to the display or to speakers.→ Keep microphones at least 1 m (3.3 ft) away from any display orspeaker.• The display’s volume settings are too high.→ Decrease the volume level of the display.Sound cuts out or echoes. • Adjustments to the environment immediately after a video conferencecall has begun may not yet have completed.→ Immediately after a video conference call has begun, be sure to speakin turn with other parties. The unit will automatically adjust audio levelsso that all parties can easily be heard.The other party hears noise. • The Boundary Microphone cable is not properly connected.→ Check that the Boundary Microphone is properly connected to the unit(Page 23).The orientation of the imageand sound do not match (thevoice of a person on a side ofthe screen comes from theopposite side’s speaker, etc.).• The speakers are not properly positioned.→ Position speakers on either side of the display and check that the left/right wiring is correct. If you place the display at the front of the roomand the speakers at the back, the microphone’s left/right spatialdirection may be reversed, and the orientation of the image and soundwill not match.• The speakers of the other party are not properly positioned.→ Ask the other party to position speakers on either side of the display.When the MIC position is set automatically, if the other party places thedisplay at the front of the room and the speakers at the back, themicrophone’s left/right spatial direction may be reversed, and theorientation of the image and sound will not match.• The MIC positions set manually by the other party are incorrect.→ Ask the other party to confirm the manual settings of their MIC positions.When setting the MIC position manually, the left/right orientation shouldmatch the left/right channels as viewed from the side of the main videocamera. When the MIC position is set to "Center stereo", make surethat it is placed with its connector facing the display (Page 83).System SettingsProblem Cause and SolutionThe settings of the unit cannotbe changed.• A video conference call is in progress.→ Make settings after ending the current video conference call.• A video conference call is incoming.→ If a video conference call is received when editing contact list settings,a dialog box will be displayed asking whether to answer the call withoutsaving the settings. Settings other than contact list settings will be lostwhen a video conference call is received. In that case, change thesettings again after the video conference call has finished.Document Version 2011-04 Operating Manual 111Additional Information