Asterisk - Extensions

/etc/asterisk/extensions.conf

[internal]
exten => 911,1,Answer
exten => 911,2,Wait,1
exten => 911,3,mp3player(/tmp/clawfinger.mp3)
exten => 911,4,Hangup

exten => _0.,1,Dial,CAPI/0216970000:${EXTEN:1}|60|r
exten => _0.,2,Congestion