---------- extentions.conf
[default]
exten => 999,1,Dial(Zap/1/80504452905)

---------- zaptel.conf
fxoks=1

---------- zapata.conf
[channels]
usecallerid=yes
hidecallerid=no
callwaiting=no
threewaycalling=yes
transfer=yes
echocancel=yes
echotraining=yes
context=default
signalling=fxs_ks
channel =>1