Someone

exten => _X.,1,NoOp(EXTEN = ${EXTEN})
exten => _X.,2,Ringing()
exten => _X.,3,SetVar(INDIALEDNUM=${EXTEN:3})
exten => _X.,4,WaitExten(4)
exten => _X.,5,SetVar(DIRECTION=INCOMING)
exten => _X.,6,GotoIf($["x${DID${EXTEN}}" != "x"]?7:10)
exten => _X.,7,SetVar(FROMEXTEN=${DID${EXTEN}})
exten => _X.,8,Goto(extensions|${DID${EXTEN}}|1)
exten => _X.,10,Goto(menu|s|1)