Hi Muriel, First, in system.conf configuration you are defining a dchannel for each E1, and in the chan_dahdi.conf you use only the first one. I want to ask you why are you using one sigchan for each E1? you can use 1 sigchan for all E1 Also there's a mistake in the channel configuration on chan_dahdi.conf try using my working set system.conf # First Span span=1,1,0,ccs,hdb3 bchan=1-15,17-31 mtp2=16 # Second Span span=2,0,0,ccs,hdb3 bchan=32-62 # Third Span span=3,0,0,ccs,hdb3 bchan=63-93 chan_dahdi.conf ; Group 1 group => 1 signalling = ss7 ss7type = itu linkset = 1 pointcode = 2008 adjpointcode = 2090 defaultdpc = 2090 networkindicator = national ; E1 1 cicbeginswith = 1 channel=1-15 cicbeginswith = 17 channel = 17-31 sigchan = 16 ; E1 2 cicbeginswith = 33 channel = 32-62 ; E1 3 cicbeginswith = 65 channel = 63-93 If you need add more sigchan use this conf as template Regards Jorge Valencia Gallardo Asterisk Chile www.asteriskchile.cl +56 9 94426869 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-ss7/attachments/20100707/41d7cb68/attachment.htm