Someone

SIP Debugging Disabled
    -- Starting simple switch on 'Zap/1-1'
[May 13 16:49:06] NOTICE[64396]: chan_zap.c:6365 ss_thread: Got event 18 (Ring Begin)...
[May 13 16:49:07] NOTICE[64396]: chan_zap.c:6365 ss_thread: Got event 2 (Ring/Answered)...
    -- Executing [s@DID_trunk_1:1] Goto("Zap/1-1", "default|6001|1") in new stack
    -- Goto (default,6001,1)
    -- Executing [6001@default:1] Macro("Zap/1-1", "stdexten|6001|SIP/6001") in new stack
    -- Executing [s@macro-stdexten:1] Dial("Zap/1-1", "SIP/6001|20") in new stack
    -- Called 6001
    -- SIP/6001-00d3e000 is ringing
    -- Got SIP response 480 "Temporarily Unavailable" back from 10.0.0.240
    -- SIP/6001-00d3e000 is circuit-busy
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing [s@macro-stdexten:2] Goto("Zap/1-1", "s-CONGESTION|1") in new stack
    -- Goto (macro-stdexten,s-CONGESTION,1)
    -- Executing [s-CONGESTION@macro-stdexten:1] Goto("Zap/1-1", "s-NOANSWER|1") in new stack
    -- Goto (macro-stdexten,s-NOANSWER,1)
    -- Executing [s-NOANSWER@macro-stdexten:1] VoiceMail("Zap/1-1", "6001|u") in new stack
    -- <Zap/1-1> Playing 'vm-theperson' (language 'en')
    -- <Zap/1-1> Playing 'digits/6' (language 'en')
    -- <Zap/1-1> Playing 'digits/0' (language 'en')
    -- <Zap/1-1> Playing 'digits/0' (language 'en')
    -- <Zap/1-1> Playing 'digits/1' (language 'en')
    -- <Zap/1-1> Playing 'vm-isunavail' (language 'en')
  == Spawn extension (macro-stdexten, s-NOANSWER, 1) exited non-zero on 'Zap/1-1' in macro 'stdexten'
  == Spawn extension (macro-stdexten, s-NOANSWER, 1) exited non-zero on 'Zap/1-1'
    -- Hungup 'Zap/1-1'