Brother International MFC-8820D Network Users Manual - English - Page 166

APPENDIX A - 7, Data Transfer OK/Entering, FirmWareUpdate mode

Page 166 highlights

When you see 226 Data Transfer OK/Entering FirmWareUpdate mode, you can be sure that the firmware file is being transferred to the Print/Fax server. If you do not see this message, the file you are sending to the printer will either be ignored or the printer will print garbage. You must use the "bin" command to put the FTP client into Binary communications mode. If you do not specify the bin command the upgrade process will not function correctly. APPENDIX A - 7

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APPENDIX A - 7
When you see
226 Data Transfer OK/Entering
FirmWareUpdate mode
, you can be sure that the firmware file is
being transferred to the Print/Fax server. If you do not see this
message, the file you are sending to the printer will either be ignored
or the printer will print garbage.
You must use the “bin” command to put the FTP client into
Binary communications mode. If you do not specify the
bin
command the upgrade process will not function correctly.