[root@asterisk-vgdl ~]# cat /etc/dahdi/system.conf
#autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
#autogenrated on 2013-10-16
#Dahdi Channels Configurations
#For detailed Dahdi options, view /etc/dahdi/system.conf.bak
loadzone=mx
defaultzone=mx

#Sangoma A102 port 1 [slot:4 bus:10 span:1] <wanpipe1>
#span=1,1,0,ccs,hdb3
#e&m=1-31
span=1,1,0,cas,hdb3
cas=1-15:1101
#dchan=16
cas=17-31:1101
echocanceller=oslec,1-15,17-31