group=2
context=incoming_pstn
language=en
signalling=fxs_ks
usecallerid=yes
hidecallerid=no
callerid=asreceived
cidsignalling=v23 ;for UK caller ID
cidstart=polarity ;for UK caller ID
echocancel=yes
echocancelwhenbridged=yes
echotraining=400
rxgain=8.0
txgain=7.0
channel => 2,3