[channels]
usecallerid=yes
hidecallerid=yes
callwaiting=no
threewaycalling=yes
transfer=yes
echocancel=yes
echotraining=800
immediate=no
rxgain=12.0
txgain=3.0
echocancelwhenbridged=yes
; define channels
context=incoming
signalling=fxs_ks
toneduration=500
channel => 1