-- Accepting call from '5145552501' to '5540' on channel 0/4, span 1
    -- Executing Dial("Zap/4-1", "Zap/g5/5540") in new stack
Nov 29 23:18:54 WARNING[19639]: chan_zap.c:4453 zt_new: Channel 99 already has a Real call
    -- Called g5/5540
    -- Moving call from channel 99 to channel 119
    -- Zap/99-1 answered Zap/4-1
    -- Attempting native bridge of Zap/4-1 and Zap/99-1
    -- Channel 0/4, span 1 got hangup
    -- Hungup 'Zap/99-1'
  == Spawn extension (from_bell, 5540, 1) exited non-zero on 'Zap/4-1'
    -- Hungup 'Zap/4-1'
Nov 29 23:18:58 WARNING[19639]: chan_zap.c:7067 pri_fixup_principle: Call specified, but not found?
Nov 29 23:18:58 WARNING[19639]: chan_zap.c:7875 pri_dchannel: Hangup on bad channel 0/23 on span 5
    -- Channel 0/21, span 1 got hangup
    -- Hungup 'Zap/97-1'
  == Spawn extension (from_bell, 7111, 1) exited non-zero on 'Zap/21-1'