Allied Telesis AT-S102 - Manual (Page 324)

Chapter 11: Uploading and Downloading Files
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4. After you’ve selected a download option and provided the necessary
information, the management card, using the information you defined
in its TFTP client, contacts the TFTP server on your network and
requests the appropriate files.
Note
The management card or a line card may be damaged if you power
off the chassis or remove it from the chassis while it is writing a file
to flash memory.