Synway Information Engineering Co., Ltd
SMG-D Series Analog Gateway User Manual (Version 2.0.0)
Page 24
set. By default, there are already three pieces of tone parameters on the gateway which you can
modify or delete according to your actual requirement.
Click
Modify
to modify the tone parameter on the tone parameter modification interface.
The table below explains the items shown on the interface.
Item
Description
Index
The unique index of each group of tone detectors.
Tone
There are five options:
Dial Tone
,
Busy Tone
,
Ringback Tone, F1, F2
.
The 1
st
Mid-frequency
The 1
st
center frequency. Range of value: 200~3500, calculated by Hz. The default
value is 450.
The 2
nd
Mid-frequency
The 2
nd
center frequency. Range of value: 0 or 200~3500, calculated by Hz. The
default value is 0.
Duration at ON State
The duration of tones at on state. The default setting: Dial Tone is 1500ms, Busy
Tone is 350ms, Ringback Tone is 1000ms.
Duration at OFF
State
The duration of tones at off state. The default setting: Dial Tone is 0ms, Busy Tone is
350ms, Ringback Tone is 4000ms.
Period Count
Sets the count of periods as the condition to determine a periodic tone. The default
setting: Dial Tone is 0, Busy Tone is 2, Ringback Tone is 1.
Duration Error at
ON/OFF State
Sets the duration error at ON/OFF state, calculated by ms, with the default value of
20.
To delete a piece of tone, check the checkbox before the corresponding index and click the
„
Delete
‟ button.
Check All
means to select all available items on the current page;
Uncheck All
means to cancel all selections on the current page;
Inverse
means to uncheck the selected items
and check the unselected. To clear all tone at a time, click the
Clear All
button.
3.5.4 Tone Generator
By default, there are four tones on the Tone Generator Setting interface: Dial Tone—a single tone
with 450HZ frequency, plays continuously; Ringback Tone—a single tone with 450HZ frequency,
repeatedly playing in the method of 1s play and 4s pause; Busy Tone—a single tone with 450HZ
frequency, repeatedly playing in the method of 350ms play and 350ms pause. You can configure
the tone generator manually.
3.5.5 DTMF
The DTMF configuration include two parts: DTMF Detector and DTMF Generator. The table below
explains the items shown on the interface.
Item
Description
Energy Difference of
High-freq minus
Low-freq
Set the allowed difference of the high frequency energy in the DTMF signal over the
low frequency energy. The value range is 0~24, in decibel, and the default value is
5.
Energy Difference of
Low-freq minus
High-freq
Set the allowed difference of the low frequency energy in the DTMF signal over the
high frequency energy. The value range is 0~24, in decibel, and the default value is
9.
Minimum Duration
at ON
Set the minimum duration at ON for the DTMF signal. Range of value: 10
～
2000,
calculated by ms. The default value is 28.
