signalling=fxs_ks
musiconhold=default
language=en
usecallerid=yes
callerid=asrecieved
;faxdetect=incoming
busydetect=yes
busycount=4
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=2.0
txgain=0.0

group=1
context=ivr
channel => 1

group=2
context=agi
channel => 2

group=3
context=voicemail
channel => 3

group=4
context=context4
channel => 4