Technical References

D14 641.11 Codec C90 API Reference Guide TC6.2, JULY 2013. Copyright © 2010–2013 Cisco Systems, Inc. All rights reserved. 31
Cisco TelePresence System Codec C90 API Reference Guide
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
xConfiguration Audio Input Line [1..4] Mode
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
xConfiguration 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: <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
xConfiguration Audio Input Microphone [1..8] EchoControl NoiseReduction
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. NOTE: 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
Contents
Introduction
About the API
xConfiguration
Appendices
xCommand
xStatus
xConfiguration