Hi here is my system.conf
loadzone=us
defaultzone=us
#Sangoma A108 port 1 [slot:4 bus:5 span:1]
span=1,1,0,ccs,hdb3
bchan=1-15,17-31
echocanceller=mg2,1-15,17-31
hardhdlc=16
#Sangoma A108 port 2 [slot:4 bus:5 span:2]
span=2,2,0,ccs,hdb3
bchan=32-46,48-62
echocanceller=mg2,32-46,48-62
hardhdlc=47
#Sangoma A108 port 3 [slot:4 bus:5 span:3]
span=3,3,0,ccs,hdb3
bchan=63-77,79-93
echocanceller=mg2,63-77,79-93
hardhdlc=78
#Sangoma A108 port 4 [slot:4 bus:5 span:4]
span=4,4,0,ccs,hdb3
bchan=94-108,110-124
echocanceller=mg2,94-108,110-124
hardhdlc=109
and below mentioned is chan_dahdi.conf.
[trunkgroups]
[channels]
context=default
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
relaxdtmf=yes
rxgain=0.0
txgain=0.0
group=1
callgroup=1
pickupgroup=1
immediate=no
;Sangoma A108 port 1 [slot:4 bus:5 span:1]
switchtype=euroisdn
context=outbound
group=1
echocancel=yes
signalling=pri_cpe
channel =>1-15,17-31
Sangoma A108 port 2 [slot:4 bus:5 span:2]
switchtype=euroisdn
context=outbound
group=2
echocancel=yes
signalling=pri_cpe
channel =>32-46,48-62
;Sangoma A108 port 3 [slot:4 bus:5 span:3]
switchtype=euroisdn
context=outbound
group=1
echocancel=yes
signalling=pri_cpe
channel =>63-77,79-93
;Sangoma A108 port 4 [slot:4 bus:5 span:4]
switchtype=euroisdn
context=TESTCONF
group=1
echocancel=yes
signalling=pri_cpe
channel =>94-108,110-124
Please let me know if any addition details are required. please tell how to take protocol debug info, is it PRi debug u r asking for…?