-- Executing Dial("Zap/23-1", "ZAP/G1/913172222222") in new stack
    -- Requested transfer capability: 0x00 - SPEECH
    -- Called G1/913172222222
    -- Channel 0/22, span 1 got hangup
    -- Zap/22-1 is circuit-busy
    -- Hungup 'Zap/22-1'
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing Hangup("Zap/23-1", "") in new stack