-- SIP/main is circuit-busy
    -- Zap/1-1 is ringing
    -- Got SIP response 486 "Busy Here" back from 10.1.16.165
    -- Zap/1-1 is ringing
    -- Zap/1-1 is ringing
    -- Zap/1-1 is ringing
    -- Nobody picked up in 15000 ms
    -- Hungup 'Zap/1-1'
    -- Executing [s@ael-incoming:52] Set("Zap/2-1", "attempts=0") in new stack
    -- Executing [s@ael-incoming:53] Answer("Zap/2-1", "") in new stack
    -- Executing [s@ael-incoming:54] Wait("Zap/2-1", "1") in new stack
    -- Executing [s@ael-incoming:55] Set("Zap/2-1", "TIMEOUT(digit)=5") in new stack
    -- Digit timeout set to 5
    -- Executing [s@ael-incoming:56] Set("Zap/2-1", "TIMEOUT(response)=15") in new stack
    -- Response timeout set to 15
    -- Executing [s@ael-incoming:57] BackGround("Zap/2-1", "custom/office-closed") in new stack
    -- <Zap/2-1> Playing 'custom/office-closed' (language 'en')
  == CDR updated on Zap/2-1
    -- Executing [1@ael-incoming:1] Directory("Zap/2-1", "default|ael-internal") in new stack
  == Parsing '/etc/asterisk/voicemail.conf': Found
    -- <Zap/2-1> Playing 'dir-intro' (language 'en')
    -- <Zap/2-1> Playing '/var/spool/asterisk/voicemail/default/100/greet' (language 'en')
    -- <Zap/2-1> Playing 'dir-instr' (language 'en')
    -- Executing [100@ael-internal:1] Goto("Zap/2-1", "sw-40-100|1") in new stack
    -- Goto (ael-internal,sw-40-100,1)
    -- Executing [sw-40-100@ael-internal:1] Macro("Zap/2-1", "ael-std-exten-ael|sw-40-100|SIP/myextension") in new stack
    -- Executing [s@macro-ael-std-exten-ael:1] Set("Zap/2-1", "ext=sw-40-100") in new stack
    -- Executing [s@macro-ael-std-exten-ael:2] Set("Zap/2-1", "dev=SIP/myextension") in new stack
    -- Executing [s@macro-ael-std-exten-ael:3] Dial("Zap/2-1", "SIP/myextension/sw-40-100|20") in new stack
[Apr  9 22:10:01] WARNING[4650]: app_dial.c:1090 dial_exec_full: Unable to create channel of type 'SIP' (cause 3 - No route to destination)
  == Everyone is busy/congested at this time (1:0/0/1)
    -- Executing [s@macro-ael-std-exten-ael:4] Goto("Zap/2-1", "sw-37-CHANUNAVAIL|1") in new stack
    -- Goto (macro-ael-std-exten-ael,sw-37-CHANUNAVAIL,1)
    -- Executing [sw-37-CHANUNAVAIL@macro-ael-std-exten-ael:1] VoiceMail("Zap/2-1", "usw-40-100") in new stack
[Apr  9 22:10:01] WARNING[4650]: app_voicemail.c:2854 leave_voicemail: No entry in voicemail config file for 'w-40-100'
    -- Executing [sw-37-CHANUNAVAIL@macro-ael-std-exten-ael:2] Goto("Zap/2-1", "s|5") in new stack
    -- Goto (macro-ael-std-exten-ael,s,5)
    -- Executing [s@macro-ael-std-exten-ael:5] NoOp("Zap/2-1", "Finish switch-ael-std-exten-ael-37") in new stack
    -- Executing [sw-40-100@ael-internal:2] Goto("Zap/2-1", "_1XX|2") in new stack
    -- Goto (ael-internal,_1XX,2)
    -- Executing [_1XX@ael-internal:2] NoOp("Zap/2-1", "Finish switch-ael-internal-40") in new stack
  == Auto fallthrough, channel 'Zap/2-1' status is 'CHANUNAVAIL'
    -- Hungup 'Zap/2-1'