Cisco TelePresence Codec C90 Administrator's Manual page 35

Cisco TelePresence System Codec C90 and Profile 65" Dual using C90
Contents Introduction
Audio Input Line [1..4] Level
Define the audio level of the Line input connector, in steps of 1 dB.
See the Audio Level tables in the Physical Interfaces Guide for the codec for a complete overview
of the menu values represented in dB.
Requires user role: ADMIN
Value space: <0..24>
Range: Select a value from 0 to 24 dB.
Example: Audio Input Line 1 Level: 10
Audio Input Line [1..4] LoopSuppression
The loop suppression functionality detects whether a delayed signal loop is present from an audio
Line output to an audio Line input on the codec. If a loop is detected the unwanted feedback is
suppressed.
NOTE: Only loops between line output 3 and line input 3, and between line output 4 and line input
4 are suppressible.
Requires user role: ADMIN
Value space: <On/Off>
On: Activate Loop Suppression.
Off: Deactivate Loop Suppression.
Example: Audio Input Line 3 LoopSuppression: On
Audio Input Line [1..4] Mode
Set the audio input line mode.
Requires user role: ADMIN
Value space: <On/Off>
On: Enable the Audio Line input.
Off: Disable the Audio Line input.
Example: Audio Input Line 1 Mode: On
Audio Input Microphone [1..8] EchoControl Mode
The echo canceller continuously adjusts itself to the audio characteristics of the room and
compensate for any changes it detects in the audio environment. If the changes in the audio
conditions are very significant the echo canceller may take a second or two to re-adjust.
Requires user role: ADMIN
Value space: <On/Off>
On: Echo Control is normally set to On to prevent the far end from hearing their own audio.
Once selected, echo cancellation is active at all times.
Off: Echo Control should be switched Off if external echo cancellation or playback equipment
is used.
Example: Audio Input Microphone 1 EchoControl Mode: On
D14635.0 6 Profile C90 and Codec C90 Administrator Guide TC4.2, July 2011.
Copyright © 2010-2011 Cisco Systems, Inc. All rights reserved.
Web interface Advanced settings Advanced settings
Audio Input Microphone [1..8] EchoControl NoiseReduction
The system has a built-in noise reduction which reduces constant background noise (e.g.
noise from air-conditioning systems, cooling fans etc.). In addition, a high pass filter (Humfilter)
reduces very low frequency noise. NOTE: Requires the Echo Control Mode to be enabled for the
microphone.
Requires user role: ADMIN
Value space: <On/Off>
Example: Audio Input Microphone 1 EchoControl NoiseReduction: On
Audio Input Microphone [1..8] EchoControl Dereverberation
The system has built-in signal processing to reduce the effect of room reverberation. NOTE:
Requires the Echo Control Mode to be enabled for the microphone.
Requires user role: ADMIN
Value space: <On/Off>
Example: Audio Input Microphone 1 EchoControl Dereverberation: On
Audio Input Microphone [1..8] Equalizer ID
Select the audio input microphone equalizer ID.
Requires user role: ADMIN
Value space: <1..16>
Example: Audio Input Microphone 1 Equalizer ID: 1
Audio Input Microphone [1..8] Equalizer Mode
Set the audio input microphone equalizer mode.
Requires user role: ADMIN
Value space: <On/Off>
Example: Audio Input Microphone 1 Equalizer Mode: Off
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On: The Noise Reduction should be enabled in the presence of low frequency noise.
Off: Turn off the Noise Reduction.
On: Turn on the dereverberation.
Off: Turn off the dereverberation.
Range: Select Equalizer ID 1 to 16.
On: Enable the equalizer for the audio input microphone.
Off: No equalizer.
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