*CLI> DIAL 200@TT_extensions
    -- Executing Macro("OSS/dsp", "extwvm|Hui||200@TT") in new stack
    -- Executing Dial("OSS/dsp", "IAX/Hui||t") in new stack
Feb 17 12:03:43 WARNING[8359]: channel.c:2530 ast_request: No channel type registered for 'IAX'
Feb 17 12:03:43 NOTICE[8359]: app_dial.c:1010 dial_exec_full: Unable to create channel of type 'IAX' (cause 66 - Channel not implemented)
  == Everyone is busy/congested at this time (1:0/0/1)
    -- Executing VoiceMail("OSS/dsp", "u200@TT@TT") in new stack
 << Console call has been answered >>
Feb 17 12:03:43 WARNING[8359]: app_voicemail.c:2384 leave_voicemail: No entry in voicemail config file for '200'
*CLI> Feb 17 12:03:53 WARNING[8359]: pbx.c:2405 __ast_pbx_run: Timeout, but no rule 't' in context 'TT_extensions'
 << Hangup on console >>