Hello list, Using asterisk SVN-trunk-r172441 ibss7 SVN-trunk-r251 dahdi SVN-trunk-r5895 Echo Canceller: MG2 Everything is up dand running, but I am unable to send out the dtmf tones... Any Idea? Olivier Dahdi config span=1,0,0,ccs,hdb3 bchan=1-15 mtp2=16 bchan=17-31 chan_dahdi [channels] callwaiting=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=no echotraining=128 group=1 callgroup=1 pickupgroup=1 rxgain = 2.0 txgain = 3.0 signalling = ss7 ss7type = itu ; or ansi if you are using an ANSI link linkset = 1 ; Pick a number for your linkset identifier in chan_dahdi.conf networkindicator=national ss7_calling_nai=international ss7_internationalprefix = 00 ss7_nationalprefix = pointcode = 8001 adjpointcode = 3353 defaultdpc = 3353 cicbeginswith = 1 channel=1-15 cicbeginswith = 17 channel = 17-31 sigchan = 16