erbosity is at least 7
    -- Accepting AUTHENTICATED call from XXX.XXX.XXX.XXX:
       > requested format = ulaw,
       > requested prefs = (),
       > actual format = gsm,
       > host prefs = (gsm),
       > priority = mine
    -- Executing Queue("IAX2/teliax-1", "support") in new stack
    -- Started music on hold, class 'default', on channel 'IAX2/teliax-1'
    -- Called SIP/2002
    -- SIP/2002-085d is ringing
    -- SIP/2002-085d answered IAX2/teliax-1
    -- Stopped music on hold on IAX2/teliax-1
Dec  2 16:09:24 NOTICE[17953]: res_musiconhold.c:507 monmp3thread: Request to schedule in the past?!?!
    -- Accepting AUTHENTICATED call from XXX.XXX.XXX.XXX:
       > requested format = ulaw,
       > requested prefs = (),
       > actual format = gsm,
       > host prefs = (gsm),
       > priority = mine
    -- Executing Queue("IAX2/teliax-3", "support") in new stack
    -- Started music on hold, class 'default', on channel 'IAX2/teliax-3'
    -- Called SIP/2002
    -- SIP/2002-7a10 is ringing
Dec  2 16:09:44 NOTICE[17953]: res_musiconhold.c:507 monmp3thread: Request to schedule in the past?!?!
    -- Stopped music on hold on IAX2/teliax-3
  == Spawn extension (default, 310XXXXXXX, 1) exited non-zero on 'IAX2/teliax-3'
    -- Hungup 'IAX2/teliax-3'
    -- Accepting AUTHENTICATED call from XXX.XXX.XXX.XXX:
       > requested format = ulaw,
       > requested prefs = (),
       > actual format = gsm,
       > host prefs = (gsm),
       > priority = mine
    -- Executing Queue("IAX2/teliax-2", "support") in new stack
    -- Started music on hold, class 'default', on channel 'IAX2/teliax-2'
    -- Called SIP/2002
    -- SIP/2002-7f46 is ringing
Dec  2 16:10:04 NOTICE[17953]: res_musiconhold.c:507 monmp3thread: Request to schedule in the past?!?!
Dec  2 16:10:05 NOTICE[17953]: res_musiconhold.c:507 monmp3thread: Request to schedule in the past?!?!
    -- Stopped music on hold on IAX2/teliax-2
  == Spawn extension (default, 310XXXXXXX, 1) exited non-zero on 'IAX2/teliax-2'
    -- Hungup 'IAX2/teliax-2'
Dec  2 16:10:24 NOTICE[17953]: res_musiconhold.c:507 monmp3thread: Request to schedule in the past?!?!
  == Spawn extension (default, 310XXXXXXX, 1) exited non-zero on 'IAX2/teliax-1'
    -- Hungup 'IAX2/teliax-1'
dedicated*CLI>