6
4)
4)
4)
4) The
The
The
The installation
installation
installation
installation for
for
for
for connecting
connecting
connecting
connecting VoIP
VoIP
VoIP
VoIP gateway
gateway
gateway
gateway for
for
for
for Call
Call
Call
Call Termination
Termination
Termination
Termination
Suppose a VoIP call originates from US, which was transferred from US Server to China Server
on VoIP , finally the call will be terminated from internet to GSM network and to be sent out to the
destination answer side.
The sketch for connecting to VoIP gateway
5)
5)
5)
5) The
The
The
The installation
installation
installation
installation for
for
for
for connecting
connecting
connecting
connecting to
to
to
to alarm
alarm
alarm
alarm system
system
system
system for
for
for
for Security
Security
Security
Security
The GSM FWT can substitute the PSTN for connecting to alarm system for security purpose
when PSTN failure or not available.
The sketch for connecting to alarm system
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