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Cisco TelePresence System Codec C90 and Prole 65” Dual using C90 Administrator guide
D14635.05 Prole C90 and Codec C90 Administrator Guide TC4.1, February 2011.
Copyright © 2010-2011 Cisco Systems, Inc. All rights reserved. www.cisco.com

Audio Input Line [1..4] Channel

Dene whether the Audio Line input is a mono signal or part of a multichannel signal.
Requires user role: ADMIN
Value space: <Left/Right/Mono>
Left: The Audio Line input signal is the left channel of a stereo signal.
Right: The Audio Line input signal is the right channel of a stereo signal.
Mono: The Audio Line input signal is a mono signal.
Exam ple: Audio Input 1 Channel: Left

Audio Input Line [1..4] Level

Dene the audio level of the Line input connector, in steps of 1dB.
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 24dB.
Exam ple: 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.
O: Deactivate Loop Suppression.
Exam ple: 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.
O: Disable the Audio Line input.
Exam ple: 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 signicant 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.
O: Echo Control should be switched O if external echo cancellation or playback equipment is
used.
Exam ple: Audio Input Microphone 1 EchoControl Mode: On

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 lter (Humlter) 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>
On: The Noise Reduction should be enabled in the presence of low frequency noise.
O: Turn o the Noise Reduction.
Exam ple: Audio Input Microphone 1 EchoControl NoiseReduction: On

Audio Input Microphone [1..8] EchoControl Dereverberation

The system has built-in signal processing to reduce the eect of room reverberation. NOTE: Requires
the Echo Control Mode to be enabled for the microphone.
Requires user role: ADMIN
Value space: <On/Off>
On: Turn on the dereverberation.
O: Turn o the dereverberation.
Exam ple: 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..14>
Range: Select Equalizer ID 1 to 14.
Exam ple: Audio Input Microphone 1 Equalizer ID: 1
Contents
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Introduction
Advanced conguration
Password protection
Web interface
Appendices
Advanced conguration