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  == Using SIP RTP CoS mark 5
    -- Executing [6001@internal:1] Dial("SIP/demo_bob-00000001", "SIP/demo_alice,20") in new stack
[Jun 27 06:26:14] WARNING[13302][C-00000001]: app_dial.c:2431 dial_exec_full: Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)
  == Everyone is busy/congested at this time (1:0/0/1)
    -- Auto fallthrough, channel 'SIP/demo_bob-00000001' status is 'CHANUNAVAIL'
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    -- Registered SIP 'demo_alice' at 192.168.1.6:5060
       > Saved useragent "CSipSimple_astar-rtl8703-19/r2457" for peer demo_alice
[Jun 27 06:31:15] NOTICE[2548]: chan_sip.c:27554 handle_request_subscribe: Received SIP subscribe for peer without mailbox: demo_alice
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  == Using SIP RTP CoS mark 5
    -- Executing [6002@internal:1] Dial("SIP/demo_alice-00000002", "SIP/demo_bob,20") in new stack
  == Using SIP RTP CoS mark 5
    -- Called SIP/demo_bob
    -- SIP/demo_bob-00000003 is ringing
    -- SIP/demo_bob-00000003 is ringing
    -- SIP/demo_bob-00000003 is ringing
    -- SIP/demo_bob-00000003 is ringing
    -- SIP/demo_bob-00000003 answered SIP/demo_alice-00000002
    -- Channel SIP/demo_alice-00000002 joined 'simple_bridge' basic-bridge <7009dec5-a7d6-400e-84af-1f8a1d97956c>
    -- Channel SIP/demo_bob-00000003 joined 'simple_bridge' basic-bridge <7009dec5-a7d6-400e-84af-1f8a1d97956c>
       > Bridge 7009dec5-a7d6-400e-84af-1f8a1d97956c: switching from simple_bridge technology to native_rtp
       > 0x7f4884015280 -- Probation passed - setting RTP source address to 192.168.1.6:4000
    -- Channel SIP/demo_bob-00000003 left 'native_rtp' basic-bridge <7009dec5-a7d6-400e-84af-1f8a1d97956c>
    -- Channel SIP/demo_alice-00000002 left 'native_rtp' basic-bridge <7009dec5-a7d6-400e-84af-1f8a1d97956c>
  == Spawn extension (internal, 6002, 1) exited non-zero on 'SIP/demo_alice-00000002'
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