Follow me GSM PSTN gateway
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4) connecting VoIP gateway for Call 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.
5)connecting to alarm system for Security
The GSM FWT can substitute the PSTN for connecting to alarm system for security
purpose when PSTN failure or not available.