2592 CHAPTER 173: VO IP C ONFIGURATION COMMANDStail-length milliseconds: Echo duration in milliseconds, that is, the time thatelapses from when a subscriber speaks to when he hears the echo. It ranges from0 to 64, with a default of 32.Description Use the echo-canceller command to enable echo cancellation and set the echoduration.Use the undo echo-canceller command to disable the EC function.By default, the EC function is disabled.n This command is applicable only after the echo-canceller enable command isexecuted.Related command: subscriber-line and echo-canceller parameter.Example Configure the echo duration on voice subscriber line 1/0 to 24 milliseconds. 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 24echo-canceller parameterSyntax 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 viewParameter convergence-rate value: Sets the convergence rate of comfort noise amplitude. Itranges from 0 to 511. The greater the value, the quicker the convergence.max-amplitude value: Sets the maximum amplitude of comfort noise. It rangesfrom 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 anddoes not add comfort noise.mix-proportion-ratio value: Sets the comfort noise mixture proportion controlfactor. It ranges from 0 to 3,000 and defaults to 100. The greater the value, thehigher 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.Description Use the echo-canceller parameter command to configure echo cancellationparameters.
