Пример файла chan_dahdi.conf для интерфейса ISDN PRI E1.
[channels] group=1 context=from-trunk switchtype = euroisdn signalling = pri_cpe callerid=asreceived usecallerid=yes hidecallerid=no callwaiting=yes overlapdial=yes pridialplan=unknown usecallingpres=yes callwaitingcallerid=yes rxgain=0.0 txgain=0.0 threewaycalling=yes echocancel=yes echocancelwhenbridged=yes faxdetect=both faxbuffers=>8,full channel => 1-15,17-31
/etc/dahdi/system.conf
span=1,1,0,ccs,hdb3 bchan=1-15,17-31 dchan=16