Samsung SWL-4000AP - Manual (Page 80)

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⑪ “1K Xmodem” should be selected on Protocol, then click [send] button.
⑫ The following window shows the status of loading the AP firmware image file
to the AP.
Notice: An error message will show up if AP firmware is not corresponding to
your AP.
⑬ Firmware upgrade using RS-232C is recommended, only when “AP Manager”
cannot be used. (Refer to Chapter 13)
1K Xmodem