hardhdlc=16
#dchan=16
change to
#hardhdlc=16
dchan=16
as 1st thing.
as another, give me mgr settings regarding your a4400 config, as trkstat N of your TG to the asterisk.
I think that i've made good entry in Wiki years ago, and it should work like a charm (many, many links put into service).
BTW Czelusc is "abyss" in Polish, if anyone asks.