asterisk users - Nov 2004 - Simple *69

I created a simple rule in my extensions.conf to be able to do a *69
for the last number that called...  Enjoy..

exten => 100,1,SetVar(VMAILBOX=${EXTEN})
exten => 100,2,DBPut(callerid/${EXTEN}=${CALLERIDNUM})
exten => 100,3,Dial(IAX2/100,15,rt)

exten => *69,1,Answer
exten => *69,2,DBGet(${CALLERIDNUM}callerid=callerid/${CALLERIDNUM})
exten => *69,3,Saydigits(${${CALLERIDNUM}callerid})
exten => *69,4,Hangup()