Hello ! I was trying to compile asterisk 1.6.0.20 with libss7 support. However it seems that chan_dahdi is not compatible. I obtained libss7 according to doc/ss7.txt from: http://svn.digium.com/svn/libss7/trunk There is a definition of: int isup_blo(struct ss7 *ss7, struct isup_call *c); however in chan_dahdi.c there is something like: isup_blo(linksets[linkset-1].ss7, linksets[linkset-1].pvts[i]->cic, linksets[linkset-1].pvts[i]->dpc); which is not compatible. I checked also asterisk trunk which has the same definition. The chan_dahdi code of https://observer.router.hu/repos_pub/chan_dahdi/trunk chan_dahdi.c seems to have the correct function. Which one is correct ? Thanks Regards Hans