[channels]
echocancel=yes
echocancelwhenbridged=yes
echotraining=500
busydetect=yes
busycount=10
rxgain=0.0
txgain=0.0
;jitterbuffers=6
usecallerid=no
sendcalleridafter=2
context=incoming
signalling=fxs_ks
group=1
channel => 1-4