User manual

VOPTech Document Four Channel’s GSM VoIP Gateway

A：Mode 1

GoIP4 dial the call use SMS sender call ID

B：Mode 2

GoIP4 dial the call via itself VoIP account and add the SMS sender phone

number to Call Divet option’s Forward Number (VoIP to PSTN) automatic.

C：Mode 3

GoIP4 dial the call via itself VoIP account and add the SMS sender phone

number to SIP invites be call number.

D：SMS Dial Prefix

When GoIP4 dial a SMS call, it will automatic add this option’s digit in be

Called ID.

z Mode 1 examples:

A. GoIP4 use SMS Dial Mode 1:

One mobile phone’s number is (86)13800000000, it sends a SMS “8675588228822” to

GoIP4’s GSM SIM card. When GoIP4 device receive this SMS, it will auto to call number

8675588228822, and the caller is number 8613800000000.

The sent out signaling as follow:

B. GoIP4 use SMS Dial Mode 1 and add a prefix as 999: