LifeSize Room 220 Installation Manual page 9

The Active Microphone field in the System Information page shows which device is
functioning as the active microphone. When the value is None, the No Active Microphone
indicator appears in the status bar on the main screen of the user interface indicating
that no active microphone is available. You can view the System Information page after
you install the system and complete the initial configuration. From the main screen, press
the button on the LifeSize remote control.
Note: If you choose Line In 1, Line In 1 (No AEC), Line In 2 or Line In 2 (No AEC) as the
active microphone, and a device is not connected to the appropriate connector on
the codec, the System Information page shows Line In 1 or Line In 2 as the status
for Active Microphone. The No Active Microphone indicator does not appear in the
user interface.
The Microphone In (No AEC), Line In 1 (No AEC), and Line In 2 (No AEC) options for the
Active Microphone preference are for use with a microphone that has its own acoustic
echo canceller (AEC).
Audio Preferences: Active Microphone Volume
You can adjust the audio level for the active microphone by selecting Active Microphone
Volume and pressing OK on the LifeSize remote control.
Note: A built-in acoustic echo canceller and noise reducer are active when Microphone In,
Camera 1, or Line In is the active microphone. The built-in acoustic echo canceller
automatically attempts to adjust audio volume for optimum levels.
LifeSize Room 220 Installation Guide 9