I tried with these ones but nothing change much: http://www.voip-info.org/tiki-pagehistory.php?page=Asterisk+CAPI+readme&diff=2 My extensions are [outgoing] exten => 0,1,Goto(outgoing-isdn,s,1) [outgoing-isdn] exten => s,1,NoOp() exten => _X.,1,Dial(CAPI/mynumber:b${EXTEN}|30) Any ideas?