[channels]
; hardware channels
; default
usecallerid=yes
hidecallerid=no
callwaiting=yes
threewaycalling=yes
transfer=yes
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
txgain=3
rxgain=8

context=incoming
signalling=fxs_ks
language=en
channel => 1
channel => 2
channel => 3
channel => 4