configur freepbx to working with goip4 gateway -- 2

I have freepbx already installed and goip4 gateway already installed and configured. I want to configur freepbx to connect with goip4 gateway 3 lines (simcards) [login to view URL] 3 SIP user : user 600 recive call and working with line 1 from number start with 06 user 500 recive call working with line 2 from number start with 05 user 700 recive call working with line 3 from number strat with 07 [login to view URL] variables if user 600 dont respond he redirected to voice record after that send sms message 1 after that send sms offer 1 if user 500 dont respond he redirected to voice record after that send sms message 2 after that send sms offer 2 if user 700 dont respond he redirected to voice record after that send sms message 3 after that send sms offer 3 ps install vpn between freepbx and goip.