1. As I understand, your exchange line is physically connected to port 1.1
2. I assume your default outgoing route for users is route 1 based on your photo.
Your latest photo shows there is no allocated trunk group for route 1. You should allocate trunk group 1 (ADMIN) which are your BRI ports.
When your users dial the exchange access, it will go via route 1--> trunk group 1--> 1.2 then 1.1.
If you are not using 1.2, double-click on it under Network Interfaces and tick outgoing barred... so it is not included in the hunt for an outside line.