Output of asterisk -rvvv:

== Using UDPTL CoS mark 5
  == Using SIP RTP CoS mark 5
    -- Executing [02@from-intern:1] AGI("SIP/00041329DFD6_1-00000038", "agi://localhost/outgoingAGI") [^] in new stack
    -- <SIP/00041329DFD6_1-00000038>AGI Script agi://localhost/outgoingAGI [^] completed, returning 0
    -- Executing [02@from-intern:2] GotoIf("SIP/00041329DFD6_1-00000038", "1?4:3") in new stack
    -- Goto (from-intern,02,4)
    -- Executing [02@from-intern:4] Set("SIP/00041329DFD6_1-00000038", "TRANSFER_CONTEXT=from-intern") in new stack
    -- Executing [02@from-intern:5] NoCDR("SIP/00041329DFD6_1-00000038", "") in new stack
    -- Executing [02@from-intern:6] Dial("SIP/00041329DFD6_1-00000038", "LOCAL/02@voicemail") in new stack
    -- Called 02@voicemail
    -- Executing [02@voicemail:1] Wait("Local/02@voicemail-fc76;2", "0") in new stack
    -- Executing [02@voicemail:2] Set("Local/02@voicemail-fc76;2", "CHANNEL(language)=de") in new stack
    -- Executing [02@voicemail:3] Set("Local/02@voicemail-fc76;2", "CALLERID(num)=00") in new stack
    -- Executing [02@voicemail:4] Set("Local/02@voicemail-fc76;2", "CALLERID(name)=Zentrale Test") in new stack
    -- Executing [02@voicemail:5] Answer("Local/02@voicemail-fc76;2", "250") in new stack
    -- Local/02@voicemail-fc76;1 answered SIP/00041329DFD6_1-00000038
    -- Executing [02@voicemail:6] VoiceMail("Local/02@voicemail-fc76;2", "02,sb") in new stack
    -- <Local/02@voicemail-fc76;2> Playing '/var/spool/asterisk/voicemail/from-intern/02/busy.gsm' (language 'de')
  == Spawn extension (from-intern, 02, 6) exited non-zero on 'SIP/00041329DFD6_1-00000038'
  == Spawn extension (voicemail, 02, 6) exited non-zero on 'Local/02@voicemail-fc76;2'