[channels]

usecallerid=no
hidecallerid=no
callwaiting=yes
callwaitingcallerid=no
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
busydetect=no
callprogress=yes

echocancel=yes
echocancelwhenbridged=yes

;relaxdtmf=yes

rxgain=0
txgain=0
immediate=no

;amaflags=default

;accountcode=lss0101

;adsi=yes

;jitterbuffers=4

context=default
signalling=fxs_ks
language=en
channel => 4