-- Executing Answer("VISDN/visdn0/47.I", "") in new stack
    -- Executing Wait("VISDN/visdn0/47.I", "2") in new stack
    -- Executing Playback("VISDN/visdn0/47.I", "demo-echotest") in new stack
    -- Playing 'demo-echotest' (language 'en')
Oct  9 16:20:33 WARNING[9340]: file.c:587 ast_readaudio_callback: Failed to write frame