sendcalleridafter=2
rxgain=9.0
txgain=-6.0
language=en
context=inbound-analog
signalling=fxs_ks
usecallerid=yes
echocancel=yes
echocancelwhenbridged=yes
callwaiting=yes
usecallingpres=no
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
channel => 1