Enabling The Nonlinear Function Of Echo Cancellation - HP MSR SERIES Configuration Manual

Symptom
There are loud environment
noises.
A user hears his or her voice
when speaking.
There are echoes when both
parties speak at the same time.

Enabling the nonlinear function of echo cancellation

The nonlinear function of echo cancellation, also known as residual echo suppression, means the
removal of residual echoes after echo cancellation when the user at the local end does not speak.
Line management configuration
Select Voice Management > Line Management from the navigation tree to access the line list page, as
show in Figure
Figure 729 Line list page
Configuring an FXS voice subscriber line
Select Voice Management > Line Management from the navigation tree, and then click the
the FXS line to be configured to access the FXS line configuration page, as show in
Parameters adjusted
Increase the maximum
amplitude of comfortable noises.
Enlarge the control factor of
mixed proportion of noises.
Enlarge the judgment threshold
for bidirectional conversation.
729.
Effect
Too large amplitude might make noises
uncomfortable.
Too high a control factor leads to audio
discontinuity.
Too high a judgment threshold slows
down the convergence of the filter
factor.
706
icon of
Figure 730.