-- Accepting call from '8018285230' to '8017037001' on channel 0/1, span 1
    -- Executing Dial("Zap/1-1", "Zap/g2/8017037001") in new stack
Aug 31 21:55:52 NOTICE[29191]: 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)
    -- Channel 0/1, span 1 got hangup request
       > cdr_odbc: Error SQLConnect -1
    -- Hungup 'Zap/1-1'
dev-asterisk*CLI>