Device returns swDownloading(1) - if the downloading process is on going. Device returns swDownloadedSuccessfully(2) - if the downloading process is successfully. Device returns swDownloadedTimeout(3) - if the downloading process is timeout. Device returns swImageFileError(4) - if the downloaded image file has error CRC. Device returns swInstalling(5) - if the downloaded image file is installing (EAN is restarting). Device returns swInstallingError(6) - if EAN failed to installing downloaded image file. Device returns swInstallSuccessfully(7) - if EAN installed downloaded image file successfully. Device returns swRestoreSuccessfully(8) - if EAN restored SW successfully. Device returns swRevertSuccessfully(9) - if EAN reverted to old SW successfully. Device returns idle(10) - if EAN didn't get any SW downloading command after system booted up. Device returns unKnownError(11) - if the installing process is terminated due to NE restart by unknown reason