*CLI> set verbose 99
Verbosity was 0 and is now 99
*CLI>     -- Accepting UNAUTHENTICATED call from 201.27.90.194:
       > requested format = gsm,
       > requested prefs = (),
       > actual format = gsm,
       > host prefs = (),
       > priority = mine
    -- Executing Dial("IAX2/201.27.90.194:4569-2", "Zap/g1/44882120") in new stack
Jun 22 01:43:10 NOTICE[11095]: app_dial.c:1040 dial_exec_full: Unable to create channel of type 'Zap' (cause 34 - Circuit/channel congestion)
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing NoOp("IAX2/201.27.90.194:4569-2", "CONGESTION") in new stack