Discovery Telecom GoIP User Manual page 33

One Chunnel GSM VoIP Gateway
Mode 2 example:
GoIP use SMS Dial Mode 2:
One mobile phone's number is (86)13800000000, it sends a SMS "8675588228822" to
GoIP's GSM SIM card. When GoIP device receive this SMS, it will auto to call number as
8675588228822, and the caller number is GoIP's SIP account number.
GoIP will set the SMS sender number to "Call Divert "option's "Forward Number (VoIP
to PSTN" automatic. The result is, when SIP server receives the SMS call and call back
this GoIP then GoIP will auto call the SMS sender via GSM network.
The sent out signaling as follow:
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