*CLI>
    -- Executing Dial("SIP/5002-80a9", "Zap/1/06704526886") in new stack
    -- Called 1/06704526886
    -- Channel 0/1, span 1 got hangup
    -- Zap/1-1 is busy
    -- Hungup 'Zap/1-1'
  == Everyone is busy/congested at this time

*CLI>