Cisco TelePresence System Codec C90 Reference Manual page 30

Cisco TelePresence System Codec C90
Contents Introduction
xConfiguration Audio Input Line [1..4] Channel
Define whether the Audio Line input is a mono signal or part of a multichannel signal.
Requires user role: ADMIN
Value space: <Right/Left/Mono>
Right: The Audio Line input signal is the right channel of a stereo signal.
Left: The Audio Line input signal is the left channel of a stereo signal.
Mono: The Audio Line input signal is a mono signal.
Example: xConfiguration Audio Input 1 Channel: Left
xConfiguration 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: xConfiguration Audio Input Line 1 Level: 10
xConfiguration 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.
Only loops between line output 3 and line input 3, and between line output 4 and line input 4 can be
suppressed, hence loop suppression is always Off for input lines 1 and 2.
Requires user role: ADMIN
Value space: <Off/On>
Off: Deactivate Loop Suppression.
On: Activate Loop Suppression.
Example: xConfiguration Audio Input Line 3 LoopSuppression: On
Codec C90 API Reference Guide TC7.0, JANUARY 2014.
D14641.15
About the API xConfiguration xConfiguration
xConfiguration Audio Input Line [1..4] Mode
xConfiguration Audio Input Microphone [1..8] EchoControl Mode
xConfiguration Audio Input Microphone [1..8] EchoControl NoiseReduction
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xCommand
Set the audio input line mode.
Requires user role: ADMIN
Value space: <Off/On>
Off: Disable the Audio Line input.
On: Enable the Audio Line input.
Example: xConfiguration Audio Input Line 1 Mode: On
The echo canceller continuously adjusts itself to the audio characteristics of the room and compen-
sate 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: <Off/On>
Off: Echo Control should be switched Off if external echo cancellation or playback equipment is
used.
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.
Example: xConfiguration Audio Input Microphone 1 EchoControl Mode: On
The system has a built-in noise reduction which reduces constant background noise (for example
noise from air-conditioning systems, cooling fans etc.). In addition, a high pass filter (Humfilter)
reduces very low frequency noise. Requires the Echo Control Mode to be enabled for the
microphone.
Requires user role: ADMIN
Value space: <Off/On>
Off: Turn off the Noise Reduction.
On: The Noise Reduction should be enabled in the presence of low frequency noise.
Example: xConfiguration Audio Input Microphone 1 EchoControl NoiseReduction: On
API Reference Guide
xStatus Appendices
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