R0106-HP MSR Router Series Voice Command Reference(V7)

26
Inde
x
Meanin
g
Value ran
g
e Remarks
9
Lower limit of the DTMF tone duration. The
duration of DTMF key tone must be larger than
this threshold for the input signal to be
recognized as a DTMF digit.
30 to 150
milliseconds, with a
default of 30
milliseconds
The larger the value, the
higher the detection
specificity and the lower
the detection sensitivity.
10
Frequency of the first extra frequency point
specified for detection.
In addition, it must be a frequency 100 Hz
greater than or less than the row and column
frequency pair.
300 to 3400 Hz,
with a default of 300
Hz
N/A
11
Frequency of the second extra frequency point
specified for detection.
In addition, it must be a frequency 100 Hz
greater than or less than the row and column
frequency pair.
300 to 3400 Hz,
with a default of
3200 Hz
N/A
12
Lower limit of the amplitude of the input signal.
The average amplitude must be greater than this
threshold for the input signal to be recognized as
a DTMF digit.
0 to 700, with a
default of 375
The larger the value, the
higher the detection
specificity and the lower
the detection sensitivity.
Usage guidelines
The dtmf threshold analog command is used to fine tune detection sensitivity and specificity. You can use
this command when DTMF digit detection fails. In normal cases, use the default settings for this
command.
Examples
# Set the threshold value 40 for index 9 on FXS interface 2/1/1.
<Sysname> system-view
[Sysname] subscriber-line 2/1/1
[Sysname-subscriber-line2/1/1] dtmf threshold analog 9 40
echo-canceler
Use echo-canceler to configure echo cancellation parameters.
Use undo echo-canceler to restore the default.
Syntax
echo-canceler { convergence-rate value | max-amplitude value | mix-proportion-ratio value |
talk-threshold value }
undo echo-canceler { convergence-rate | max-amplitude | mix-proportion-ratio | talk-threshold }
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.
• The threshold of two-way talk is 1.