hydrogen:/etc/asterisk# more zapata.conf
[channels]
context=incoming
switchtype=national
signalling=fxs_ks
echocancel=128
echocancelwhenbridged=yes
echotraining=500
relaxdtmf=no
rxgain=2.0
txgain=0.0
immediate=yes
busydetect=no
busycount=12
callprogress=no
musiconhold=default
usecallerid=yes
group=1
callerid=asreceived
channel => 2-4