Synway Information Engineering Co., Ltd
SMG-D Series Analog Gateway User Manual (Version 2.0.0)
Page 32
Overtime for a
Complete AMD
Detecting Process
Judges the whole AMD detecting process overtime or not, calculated by ms, with
the default value of
70000
.
Upper Limit of Detected
Continuous Tones
Judges if the tone detected time is overtime or not.
Shortest Voice Duration
at ON State
Sets the shortest duration when the voice goes into the High voltage state,
calculated by ms, with the default value of
80
.
Shortest Voice Duration
at OFF State
Sets the shortest duration when the voice goes into the low voltage state,
calculated by ms, with the default value of
400
.
Maximum Greeting
Duration at OFF State
Sets the longest duration of the greetings at the OFF state after a call is picked up
by a man, calculated by ms, with the default value of
0
.
Shortest Silence
Duration before
Greeting
Sets the shortest silence duration before the phone is picked up by a man,
calculated by ms, with the default value of
600
.
Shortest Greeting
Duration
Sets the shortest greeting duration in case the phone is picked up by a man,
calculated by ms, with the default value of
80
.
Maximum Greeting
Duration
Sets the longest greeting duration in case the phone is picked up by a man,
calculated by ms, with the default value of
1200
.
Shortest Silence
Duration after Greeting
Sets the shortest silence duration after the phone is picked up by a man,
calculated by ms, with the default value of
1200
.
Silence Energy
Threshold
Sets an energy value that can judge the voice is silence or not, calculated by ms,
with the default value of
500
.
Energy Difference
Proportion of Tone
Sets the difference proportion of the high and low energies in the signal, with the
default value of
30.
Output AMD Debugging
Info to Syslog
Sets whether to output the AMD debugging information to Syslog.
If this feature is enabled, the gateway will automatically activate the feature of 200OK Delay
(setting global_delaysend200oktime to the default value of 15). Once a call is dialed out from the
FXO port, the gateway will detect if the call is picked up by a man or not. If it is picked up by a man,
the FXO port will go into the talk state immediately; otherwise, the FXO port will not go into the talk
state until the set time of 200OK Delay is over. After configuration, click
Save
to save your settings
into the gateway or click
Reset
to restore the configurations.
3.5.17 VPN
Figure 3-7 VPN Settings Interface
Thanks to the embedded VPN Client, the analog gateway can access the VPN network via
OPENVPN directly, not requiring extra VPN client, which simplifies the network deployment.
Meanwhile, the design of both SIP signaling messages and voice streams transporting via VPN
avoids possible problems induced by the SIP protocol in passing through the firewall and NAT.
