extensions.conf
*************************************************++
[interni]

exten => 492,1,Dial(SIP/492,60,Ttr)
exten => 492,2,Hangup
exten => 492,102,Hangup

exten => 493,1,Dial(SIP/493,60,Ttr)
exten => 493,2,Hangup
exten => 493,102,Hangup

exten => 482,1,Dial(ZAP/2r2,60,Ttr)
exten => 482,2,Hangup
exten => 482,102,Hangup

[incoming]
exten => s,1,Dial,ZAP/2

[outgoing]

exten => _X.,1,Dial(ZAP/1/${EXTEN})
exten => _X.,2,Hangup

[default]
include => interni
include => outgoing

************************************************
zapata.conf
************************************************

[channels]

signalling=fxs_ks
echocancel=yes
echocancelwhenbridged=yes
overlapdial=yes
echotraining=400
;callerid=asreceived
usecallerid=no
context=incoming
group=1
channel => 1

signalling=fxo_ks
echocancel=yes
echocancelwhenbridged=yes
overlapdial=yes
echotraining=400
callerid=482
transfer=yes
threewaycalling=yes
cancallforward=yes
context=default
busydetect=yes
callprogress=yes
group=2
channel => 2