[default]

exten => _X.,1,Dial(Local/${EXTEN}@internal)

[internal]
 exten => 123,1,SayDigits(${EXTEN})

 exten => 455,1,SayDigits(${EXTEN})

 exten => 678,1,SayDigits(${EXTEN})

 exten => *12345,1,SayDigits(${EXTEN})


 exten => i,1,Playback(invalid)
 exten => i,2,Hangup