-- Playing 'pbx-transfer' (language 'en')
    -- Stopped music on hold on SIP/asdf-56e8
    -- Executing Park("Local/700@cisco-out-cname-3110,2", "") in new stack
  == Spawn extension (cisco-out-cname, s, 1) exited non-zero on 'Local/700@cisco-out-cname-3110,2'
Apr 14 12:02:01 WARNING[4585]: file.c:627 ast_readaudio_callback: Failed to write frame
    -- Playing 'pbx-invalid' (language 'en')
  == Spawn extension (cisco-out-cname, 3039810183, 4) exited non-zero on 'SIP/cisco3-cb1a'