I am facing an issue of international call not going through and it is prompting sorry you are not authorized to call the number dialed.
I checked the CSS on the line and it is set to international CSS and in CDR i am seeing destination IP is populating as the GW IP.
The dial peer is configured to match 8011T and to route it to PRI. Below is the debug that was captured during call was made.
I dont think this is in any way related to your CSS settings as the outbound call is hitting your gateway and it is successfully able to set up the call, because you are seeing Q931.
looking at your debug info, your provider gives you a normal call clearing: