Synway Information Engineering Co., Ltd
SMG Series Analog Gateway User Manual (Version 1.5.3)
Page 39
Item
Description
Energy Difference of
High-freq minus
Low-freq
The allowed difference in dB for the DTMF high frequency energy level to surpass
the low frequency energy level. Range of value: 0~24. The default value is 5.
Energy Difference of
Low-freq minus
High -freq
The allowed difference in dB for the DTMF low frequency energy level to surpass
the high frequency energy level. Range of value: 0~24. The default value is 9.
Minimum Duration
at ON
The shortest time that a valid tone has to last at ON state. Range of value: 10
～
2000, calculated by ms. The default value is 50.
Maximum
Interruption at ON
The longest time for a valid tone to stay interrupted at ON state. Range of value: 0
～
20, calculated by ms. The default value is 5.
Center Frequency
Error
The error threshold of the center frequency at ON state in the DTMF tone, with the
default value of 1.
Lowest Energy
Threshold
The energy threshold to trigger the DTMF detection. Range of value: -40
～
-9,
calculated by dB. The default value is -30.
Minimum
Signal-to-noise
Ratio Threshold
The signal-to-noise ratio threshold to trigger the DTMF detection. Range of value:
-9
～
0, calculated by dB. The default value is -3.
After configuration, click
Save
to save your settings into the gateway or click
Reset
to restore the
configurations. If a dialog box pops up after you save your settings asking you to restart the
service, do it immediately to apply the changes. Refer to
for detailed instructions.
3.5.6 Ringing Scheme
Figure 3-36 Ringing Scheme Configuration Interface
By default, there is no available ringing scheme on the gateway. See Figure 3-36. Click
Add New
to add a ringing scheme manually, see Figure 3-37.
