3com MSR 20-20 참조 매뉴얼

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ONFIGURATION

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OMMANDS

tail-length milliseconds: Echo duration in milliseconds, that is, the time that 
elapses from when a subscriber speaks to when he hears the echo. It ranges from 
0 to 64, with a default of 32.

Use the echo-canceller command to enable echo cancellation and set the echo 
duration.

Use the undo echo-canceller command to disable the EC function.

By default, the EC function is disabled.

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subscriber-line and echo-canceller parameter.

Configure the echo duration on voice subscriber line 1/0 to 24 milliseconds.

<Sysname> system-view

[Sysname] voice-setup

[Sysname-voice] subscriber-line 1/0

[Sysname-voice-dial-line1/0] echo-canceller enable

[Sysname-voice-dial-line1/0] echo-canceller tail-length 24 

echo-canceller parameter { convergence-rate value | max-amplitude value | 
mix-proportion-ratio value | talk-threshold value }

undo echo-canceller parameter { convergence-rate | max-amplitude | 
mix-proportion-ratio | talk-threshold }

Voice view

convergence-rate value: Sets the convergence rate of comfort noise amplitude. It 
ranges from 0 to 511. The greater the value, the quicker the convergence.

max-amplitude value: Sets the maximum amplitude of comfort noise. It ranges 
from 0 to 2,048. The higher the value, the greater the maximum noise amplitude. 
The value “0” indicates that the system performs only nonlinear processing and 
does not add comfort noise.

mix-proportion-ratio value: Sets the comfort noise mixture proportion control 
factor. It ranges from 0 to 3,000 and defaults to 100. The greater the value, the 
higher the proportion of noise in the hybrid of noise and voice.

talk-threshold value: Sets the threshold of two-way talk. It ranges from 0 to 2.

Use the echo-canceller parameter command to configure echo cancellation 
parameters.