*CLI>     -- Accepting call from '561xxxxxxx' to '888xxxxxxx' on channel 0/1, span 1
    -- Executing [888xxxxxxx@from-pstn:1] Goto("Zap/1-1", "incoming|888xxxxxxx|1") in new stack
    -- Goto (incoming,888xxxxxxx,1)
    -- Executing [888xxxxxxx@incoming:1] Ringing("Zap/1-1", "") in new stack
    -- Executing [888xxxxxxx@incoming:2] Wait("Zap/1-1", "2") in new stack
    -- Executing [888xxxxxxx@incoming:3] Set("Zap/1-1", "MAILBOXNO=888xxxxxxx") in new stack
    -- Executing [888xxxxxxx@incoming:4] VoiceMail("Zap/1-1", "888xxxxxxx@default|su") in new stack
    -- <Zap/1-1> Playing '/var/spool/asterisk/voicemail/default/888xxxxxxx/unavail' (language 'en')
    -- Executing [a@incoming:1] Dial("Zap/1-1", "Zap/6/215xxxxxxx") in new stack
    -- Requested transfer capability: 0x00 - SPEECH
    -- Called 6/215xxxxxxx
    -- Zap/6-1 is proceeding passing it to Zap/1-1
    -- Zap/6-1 is making progress passing it to Zap/1-1
    -- Zap/6-1 is making progress passing it to Zap/1-1
    -- Zap/6-1 answered Zap/1-1
    -- Native bridging Zap/1-1 and Zap/6-1
    -- Channel 0/1, span 1 got hangup request, cause 16
    -- Hungup 'Zap/6-1'
  == Spawn extension (incoming, a, 1) exited non-zero on 'Zap/1-1'
    -- Hungup 'Zap/1-1'