[channels]

language=en
usecallerid=yes

; FXS Ports (incoming phones)

signalling=fxo_ks
language=en

context=dial-in
callerid="Zap-1" <123>

channel => 1

context=default
callerid="Zap-2" <456>

channel => 2

; FXO Ports (incoming lines)

signalling=fxs_ks
callerid=asreceived

context=dial-in

channel => 3

context=incomming

channel => 4