First attempt   

    -- Executing [4033@office:1] Answer("SIP/4033-09c2e808", "") in new stack
    -- Executing [4033@office:2] Dial("SIP/4033-09c2e808", "SIP/4033|20|t") in new stack
    -- Called 4033
    -- SIP/4033-09c40a30 is ringing
    -- SIP/4033-09c2e808 requested special control 16, passing it to SIP/4033-09c40a30
    -- Started music on hold, class 'default', on channel 'SIP/4033-09c40a30'
    -- Call on SIP/4033-09c40a30 left from hold
    -- SIP/4033-09c40a30 answered SIP/4033-09c2e808
    -- Stopped music on hold on SIP/4033-09c40a30
    -- Started music on hold, class 'default', on channel 'SIP/4033-09c2e808'
    -- Executing [*4023@office:1] Answer("SIP/4033-09c496f8", "") in new stack
    -- Executing [*4023@office:2] Wait("SIP/4033-09c496f8", "2") in new stack
    -- Executing [*4023@office:3] VoiceMail("SIP/4033-09c496f8", "4023|u") in new stack
    -- <SIP/4033-09c496f8> Playing 'vm-theperson' (language 'en')
    -- <SIP/4033-09c496f8> Playing 'digits/4' (language 'en')
    -- <SIP/4033-09c496f8> Playing 'digits/0' (language 'en')
    -- <SIP/4033-09c496f8> Playing 'digits/2' (language 'en')
    -- <SIP/4033-09c496f8> Playing 'digits/3' (language 'en')
    -- <SIP/4033-09c496f8> Playing 'vm-isunavail' (language 'en')
    -- Stopped music on hold on SIP/4033-09c2e808
  == Spawn extension (office, 4033, 2) exited non-zero on 'SIP/4033-09c496f8<ZOMBIE>'
    -- <SIP/4033-09c2e808> Playing 'vm-intro' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'beep' (language 'en')
    -- Recording the message
    -- x=0, open writing:  /var/spool/asterisk/voicemail/default/4023/tmp/10J82J format: wav49, 0x9c21cd8
[Feb 21 14:58:29] WARNING[1944]: res_musiconhold.c:355 spawn_mp3: /var/lib/asterisk/mohmp3 is not a valid directory
[Feb 21 14:58:29] WARNING[1944]: res_musiconhold.c:506 monmp3thread: Unable to spawn mp3player
[Feb 21 14:58:33] WARNING[2250]: app.c:599 __ast_play_and_record: No audio available on SIP/4033-09c2e808??
    -- User hung up
  == Spawn extension (office, *4023, 3) exited non-zero on 'SIP/4033-09c2e808'
    -- Executing [4033@office:1] Answer("SIP/4033-09c2e808", "") in new stack
    -- Executing [4033@office:2] Dial("SIP/4033-09c2e808", "SIP/4033|20|t") in new stack
    -- Called 4033
    -- SIP/4033-09c47950 is ringing
  == Spawn extension (office, 4033, 2) exited non-zero on 'SIP/4033-09c2e808'
    -- Executing [4033@office:1] Answer("SIP/4033-09c2e808", "") in new stack
    -- Executing [4033@office:2] Dial("SIP/4033-09c2e808", "SIP/4033|20|t") in new stack
    -- Called 4033
    -- SIP/4033-09c495e8 is ringing
    -- SIP/4033-09c2e808 requested special control 16, passing it to SIP/4033-09c495e8
    -- Started music on hold, class 'default', on channel 'SIP/4033-09c495e8'
    -- Call on SIP/4033-09c495e8 left from hold
    -- SIP/4033-09c495e8 answered SIP/4033-09c2e808
    -- Stopped music on hold on SIP/4033-09c495e8
    -- Started music on hold, class 'default', on channel 'SIP/4033-09c2e808'
    -- Executing [*4023@office:1] Answer("SIP/4033-09c42a30", "") in new stack
    -- Executing [*4023@office:2] Wait("SIP/4033-09c42a30", "2") in new stack
    -- Executing [*4023@office:3] VoiceMail("SIP/4033-09c42a30", "4023|u") in new stack
    -- <SIP/4033-09c42a30> Playing 'vm-theperson' (language 'en')
    -- Stopped music on hold on SIP/4033-09c2e808
  == Spawn extension (office, 4033, 2) exited non-zero on 'SIP/4033-09c42a30<ZOMBIE>'
    -- <SIP/4033-09c2e808> Playing 'digits/4' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/0' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/2' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/3' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'vm-isunavail' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'vm-intro' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'beep' (language 'en')
    -- Recording the message
    -- x=0, open writing:  /var/spool/asterisk/voicemail/default/4023/tmp/2vQTZq format: wav49, 0x9c21de8
[Feb 21 14:59:17] WARNING[2277]: app.c:599 __ast_play_and_record: No audio available on SIP/4033-09c2e808??
    -- User hung up
  == Spawn extension (office, *4023, 3) exited non-zero on 'SIP/4033-09c2e808'
    -- Executing [*4023@office:1] Answer("SIP/4033-09c2e808", "") in new stack
    -- Executing [*4023@office:2] Wait("SIP/4033-09c2e808", "2") in new stack
    -- Executing [*4023@office:3] VoiceMail("SIP/4033-09c2e808", "4023|u") in new stack
    -- <SIP/4033-09c2e808> Playing 'vm-theperson' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/4' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/0' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/2' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/3' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'vm-isunavail' (language 'en')
  == Spawn extension (office, *4023, 3) exited non-zero on 'SIP/4033-09c2e808'

Second try

    -- Executing [*4023@office:1] Answer("SIP/4033-09c2e808", "") in new stack
    -- Executing [*4023@office:2] Wait("SIP/4033-09c2e808", "2") in new stack
    -- Executing [*4023@office:3] VoiceMail("SIP/4033-09c2e808", "4023|u") in new stack
    -- <SIP/4033-09c2e808> Playing 'vm-theperson' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/4' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/0' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/2' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'digits/3' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'vm-isunavail' (language 'en')
    -- <SIP/4033-09c2e808> Playing 'vm-intro' (language 'en')
  == Spawn extension (office, *4023, 3) exited non-zero on 'SIP/4033-09c2e808'
testpbx*CLI> show version
Asterisk SVN-branch-1.4-r55914 built by root @ testpbx.novo1nd.com on a i686 running Linux on 2007-02-21 20:20:05 UTC