[general] ; Default context for incoming calls. context=public ; Determines whether a phone is available before accepting call. qualify=yes ; Settings common to all trunks. [trunk](!) type=peer nat=no qualify=yes insecure=port,invite dtmfmode=rfc2833 allow=ulaw,alaw,G729 ; Settings common to all internal extensions. [internal](!) context=internal type=friend host=dynamic allow=ulaw,alaw,G729 ; Twilio trunk. [twilio](trunk) context=441234567890 fromuser=441234567890 host=example.pstn.ie1.twilio.com ; Internal extensions. [1000](internal) secret=supersecurepassword [1001](internal) secret=supersecurepassword