Configuring Gain Adjustment Function; Configuring Time Adjustment Function - 3Com MSR 50 Series Configuration Manual

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Configuring Gain
Adjustment Function
c
Configuring Time
Adjustment Function
Configuration procedure
Follow these steps to configure the echo adjustment function:
To do...
Enter system view
Enter voice view
Configure echo
cancellation parameters
Enter voice subscriber
line view
Enable the echo
cancellation function
Configure echo
duration
Enable the nonlinear
function of echo
cancellation
Currently, only digital cards, instead of analog cards support the undo nlp-on
command.
Follow these steps to configure the gain adjustment function:
To do...
Enter system view
Enter voice view
Enter voice subscriber line
view
Configure the input gain on
the voice interface
Configure the output gain on
the voice interface
CAUTION: Gain adjustment may lead to a call failure. You are not recommended
to adjust the gain. If necessary, do it with the guidance of technical personnel.
Follow these steps to configure the time adjustment function:
To do...
Enter system view
Enter voice view
Configuring Adjustment Functions
Use the command...
system-view
voice-setup
echo-canceller parameter
{ convergence-rate value |
max-amplitude value |
mix-proportion-ratio value |
talk-threshold value }
subscriber-line line-number
echo-canceller enable
echo-canceller tail-length
milliseconds
nlp-on
Use the command...
system-view
voice-setup
subscriber-line line-number
receive gain value
transmit gain value
Use the command...
system-view
voice-setup
Remarks
-
-
Optional
By default, the convergence rate
of comfort noise amplitude is 0,
the maximum amplitude of
comfort noise is 256, the comfort
noise mixture proportion control
factor is 100, and the threshold
of two-way talk is 1.
-
Required
Enabled by default
Optional
32 milliseconds by default.
Optional
Enabled by default.
This command is available only
after the echo-canceller enable
command is executed.
Remarks...
-
-
-
Optional
0 dB by default.
Optional
0 dB by default.
Remarks
-
-
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