Originally Posted by dans
I see no license for IP trunks (SIP)
Good point. It's odd that a card with a voip port still needs a licence for voip trunks. I will see if I can get my hands on a licence for that.

Thanks to @conxtel I managed to set up the IP phones, they all work, still playing and learning about all the settings.

At this moment I'm working to connect my analog trunk to the system. I think I have to tell the system somewhere to use that trunk for line 01 but no idea where at the moment.