ZyXEL Communications NXC5200 - V2.20 Manuel d'utilisateur télécharger pdf (Page 19)

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 Startup message displays “Invalid Recovery Image”.

 The message here could be “Invalid Firmware”. However, it is equivalent to

“Invalid Recovery Image”.

 Press any key to enter debug mode

 Enter atuk. The console prompts warning messages and waiting for the confirmation.

Answer ‘Y’ and start to upload “recovery image” via Xmodem.

 Use the Xmodem feature of terminal emulation software to upload the file.

 Wait for about 3.5 minutes until finishing Xmodem.

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ZyXEL Communications NXC5200 - V2.20 Manuel d'utilisateur Page 19