Stuff

exten => o,1,Set(__USE_VOICEMAIL=no)
exten => o,n,GotoIf($[${LEN(${OPER_DEST})} != 0]?check-message)
exten => o,n,Dial(Local/0@${MACRO_CONTEXT},${OPER_TIMEOUT})
exten => o,n,Goto(voicemail)
exten => o,n(check-message),GotoIf($[${LEN(${OPER_MESSAGE})} = 0]?follow-me)
exten => o,n,Playback(${OPER_MESSAGE})
exten => o,n(follow-me),Dial(${OPER_DEST},${OPER_TIMEOUT},${OPER_FLAGS})
exten => o,n(voicemail),Set(__USE_VOICEMAIL=direct)
exten => o,n,Goto(${MACRO_CONTEXT},${MACRO_EXTEN},1)