*CLI>     -- Starting simple switch on 'Zap/4-1'
Jun 28 19:14:26 NOTICE[11475]: chan_zap.c:5759 ss_thread: Got event 2 (Ring/Answered)...
    -- Executing Answer("Zap/4-1", "") in new stack
  == Auto fallthrough, channel 'Zap/4-1' status is 'UNKNOWN'
    -- Hungup 'Zap/4-1'