Hi!
It is very incomplete, there are quite a few parameter like hardware DTMF and detection which can't be set for example with it and it looks like with more recent drivers there are other new options which cannot be configured from here...
And it did for me too, removing dahdi-config and setuping manually is the only thing that works...
I would have like to go the FreePBX way but I can't afford to have a server which won't survive a reboot and my ticket was just today assigned to someone...
Thank you and have a nice day!
Nick