[channels]

signalling=fxs_ks
usecallerid=yes
callwaiting=no
threewaycalling=no
transfer=yes
cancallforward=yes
echocancel=yes
echotraining=yes
echocancelwhenbridged=no
rxgain=0
txgain=0
group=1
callgroup=1
pickupgroup=1
immediate=no
faxdetect=incoming
answeronpolarityswitch=yes
hanguponpolarityswitch=yes
polarityonanswerdelay=600
progzone=es
channel => 1