Grandstream Networks GSM gateway - Manual (Page 31)

Februaray-2006 Page 31 / 42
MasterVoIP
VoIP to GSM Gateway
3.4 VoIP Master
3.4.1 What is the VoIP Master and how it works
This device connects GSM cellular telephones to the internet, by way of VoIP (Voice over Internet Protocol). A GSM module,
including a SIM card, is installed inside the VoIP device. A SIM card is a smart card that is received with a subscription to a
cellular telephone network. This following is the communication solution architecture enabled by the VoIPMaster:
One Location in the
World
Another Location in the
World
IP Network
VoIP
Near 0 Cost!
GSM
Base Stations
GSM
Cellphones
GSM
Cellphones
VoIPMaster
Management
VoIP
Master
VoIP
Master
GSM
Cellphones