extensions.conf
[default]
include=SIP
include=ISDN
[SIP]
exten => 13,1,Dial(SIP/hjb,10,t)
exten => 14,1,Dial(SIP(rme,10,t)
[ISDN]
exten => _.,1,Dial(CAPI/@13:${EXTERN})
sip.conf
[interfaces]
msn=13
incomingmsn=13
controller=1
softdtmf=0
accountcode=
context=default...