User manual

VOPTech Document Four Channel’s GSM VoIP Gateway
Copyright@2009 VOPTel Technology Co., Ltd All Rights Reserved.
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3.6.3.2 SMS Relay To GSM Network
When GoIP4 receive a message come from SIP server as follow:
The GoIP4 will send a SMS to GSM number 13682626800, the SMS content is “Hello
world”.
3.7 PSTN Caller ID Transparent
In SIP protocol, GoIP4 support PSTN Caller ID transparent to VoIP via SIP Invite signaling;