The sketch for connecting to Billing device or Computer charging system
3) The installation for connecting to PBX for call extentions
If users want to connect small PBX to this terminal, connect terminal’s “Phone port” to the PBX.
The sketch for connecting to PBX device.
4) The installation for 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.
The sketch for connecting to VoIP gateway