Mine

exten => *98,1,Answer
exten => *98,2,Wait(1)
exten => *98,3,VoiceMailMain(default)
exten => *98,4,Macro(hangupcall)
exten => _*98X.,1,Answer			; can dial *98<exten> to skip 'mailbox' prompt.  Useful for speedial.
exten => _*98X.,2,Wait(1)
exten => _*98X.,3,VoiceMailMain(${EXTEN:3}@default)
exten => _*98X.,4,Macro(hangupcall)
exten => *97,1,Answer
exten => *97,2,Wait(1)
exten => *97,3,VoicemailMain(${CALLERIDNUM}@default)
exten => *97,4,Macro(hangupcall)