3Com MSR 30 Echo-canceller parameter, Related command subscriber-lineand echo-canceller parameter

2592 CHAPTER 173: VOIP CONFIGURATION COMMANDS

tail-lengthmilliseconds: 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.

Description Use the echo-cancellercommand to enable echo cancellation and set the echo duration.

Use the undo echo-cancellercommand to disable the EC function.

By default, the EC function is disabled.

n Thisexecuted.command is applicable only after the echo-canceller enable command is

Related command: subscriber-lineand echo-canceller parameter.

Example 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

Syntax	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 }
View	Voice view
Parameter	convergence-ratevalue: Sets the convergence rate of comfort noise amplitude. It
	ranges from 0 to 511. The greater the value, the quicker the convergence.
	max-amplitudevalue: 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-ratiovalue: 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-thresholdvalue: Sets the threshold of two-way talk. It ranges from 0 to 2.
Description	Use the echo-canceller parameter command to configure echo cancellation
	parameters.