Hello to everyone, We are using libss7 now for a long time, and we have seen a small problem. If we get a ACM message from the carrier, asterisk says that the call is Proceeding now, and not Ringing as described in the documentation of the SS7-stack from Intel(dialogic). I changed 2 lines in chan_zap.c to solve this. here the diff for asterisk SVN-Version 115577: 9646c9646,9647 < p->proceeding = 1; --- > p->alerting = 1; > p->subs[SUB_REAL].needringing = 1; I hope i did it in the right way, becuase i'm on it to learn c at this time, really no PRO. Regards, Nico