uOTDR_v404_CN.zip
                                                No. PSD1-1SG100021-34

In the Zip file of uOTDR_v404_CN consists of the following directories.
Please refer to "uOTDR_CN_DownloadManual_E03.pdf" in this zip file about 
each upgrade procedure.

[uOTDR_v404_CN.zip]
  "uOTDR_404_CN.BBM" is firmware update file.
  "uOTDR_CN_DownloadManual_E03.pdf" is the download manual.
  "MU909814_ReleaseNote_v404_E.pdf" is the release note.
