This procedure may help recover PortServers exhibiting 9-1-1, 5-1-1, or 2-2-5 power LED blink codes.
Try recovering the unit by attaching a Dumb Terminal or a PC Hyperterminal connection to port 1 at 9600/8/1/none. Power on the PortServer TS unit, while the unit is powering on, hold down the reset button on the PortServer TS unit and tap the letter v on the terminal session.
You will be presented with a Diagnostic menu. Select the option to upgrade using tftp and point to the tftpboot server for the appropriate firmware image. If this does not work to recover the unit, please contact Digi Technical Support.
The “OS file” is just the firmware file that you would normally download/use to update the firmware, e.g. through the web interface.
NOTE: Be sure to use the correct ("EOS") firmware file/type! If you are unsure which firmware to use, please contact Digi Technical Support and provide the 50xxxxxx part number from the sticker located underneath the Digi device.
The following Windows-based TFTP Server has been tested successfully with this procedure: