I have difficulties with setup of routes between SIP and GSM

I established connection between automatic telephone exchange of KX-NCP500UA and the gateway OpenVox VS-GW1600-8G.


In this part of the gateway 4 GSM cards can work. I created 4 SIP access points. I want to receive the following diagram of operation.
The entering call arrives on GSM-1 - the gateway directs it on SIP-1 port.
The outgoing call arrives on SIP-1 - the gateway directs it on GSM-1.
Similarly remaining 3 GSM cards.
But when I look a log of calls - I come to bewilderment. The gateway processes entering calls correctly. And in case of an outgoing call the gateway truly defines Caller ID. But for the unclear reason will organize connection with absolutely other GSM a card.
Please help me to set up the correct routes for outgoing calls.

You need to enable fromuser option for the sip peer settings on your sip server. Then the outgoing calls will be fine.

Excuse, but I didn't understand about what you speak. Where exactly I shall include this option? In automatic telephone exchange of KX-NCP500UA or in the gateway VS-GW1600-8G.

Contact me via skype ID: tim.jjune

I try to be knocked to you in Skype. My name Аницой Игорь.