I was working with a professional to help set up our freepbx. We were able to get incoming calls to route correctly, but any outgoing calls over DAHDI would rail. The first phone would call itself, the second would call the other phone.
We connected a softphone to the trunk and were able to make calls successfully. We were trying to figure out what’s wrong with the DAHDI config.
Indeed it is it is not however a source for free professional help for your own professional , your questions are all covered in the wiki, start with the