Four Channel’s GSM VoIP Gateway
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One mobile phone’s number is (86)13800000000, it sends a SMS “8675588228822” to
GoIP_4’s GSM SIM card. When GoIP_4 device receive this SMS, it will auto to call number
as 8675588228822*(86)13800000000, and the caller number is GoIP_4’s SIP account
number.
The sent out signaling as follow:
Use can add a SMS prefix with mode 3, it will work like mode 1.
3.6.2 SMS Relay
GoIP_4 GSM gateway supported SMS relay.
The SMS Forward Number is the receiver of your VoIP system; it will receive the SMS
send from GoIP_4 when some GSM phones send a SMS to GoIP_4.
3.6.2.1 SMS Relay To VoIP System
When GoIP_4 receive a SMS come from GSM network, it will auto relay to VoIP system’s
appointed number (SMS Forward Number);
Suppose the SMS Forward Number is 3999 and SMS sender number is “
8613682626865
“,
the SMS content is “
075583185700
“;The GoIP_4 will send a message to your VoIP system
like follow:
