Version 6.8 155 Mediant 2600 E-SBC
User's Manual 14. Media
The following procedure describes how to configure echo cancellation using the Web
interface:
To configure echo cancellation using the Web interface:
1. Configure line echo cancellation:
a. Open the Voice Settings page (Configuration tab > VoIP menu > Media > Voice
Settings).
b. Set the 'Echo Canceller' field (EnableEchoCanceller) to Enable.
2. Enable acoustic echo cancellation for SBC calls:
a. In the Voice Settings page, configure the following parameters:
♦ 'Network Echo Suppressor Enable' (AcousticEchoSuppressorSupport) -
enables the network Acoustic Echo Suppressor
♦ 'Echo Canceller Type' (EchoCancellerType) - defines the echo canceller type
♦ 'Attenuation Intensity' (AcousticEchoSuppAttenuationIntensity) - defines the
acoustic echo suppressor signals identified as echo attenuation intensity
♦ 'Max ERL Threshold' (AcousticEchoSuppMaxERLThreshold) - defines the
acoustic echo suppressor maximum ratio between signal level and returned
echo from the phone
♦ 'Min Reference Delay' (AcousticEchoSuppMinRefDelayx10ms) - defines the
acoustic echo suppressor minimum reference delay
♦ 'Max Reference Delay' (AcousticEchoSuppMaxRefDelayx10ms) - defines
the acoustic echo suppressor maximum reference delay
b. Open the IP Profile Settings page (Configuration tab > VoIP menu > Coders and
Profiles > IP Profile Settings), and set the 'Echo Canceller' field to Acoustic.
c. Enable the Forced Transcoding feature (using the TranscodingMode parameter)
to allow the device to use DSP channels, which are required for acoustic echo
cancellation.
Note: The following additional echo cancellation parameters are configurable only
through the ini file:
• ECHybridLoss - defines the four-wire to two-wire worst-case Hybrid loss
• ECNLPMode - defines the echo cancellation Non-Linear Processing (NLP) mode
• EchoCancellerAggressiveNLP - enables Aggressive NLP at the first 0.5 second of
the call
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