3Com 3CRDSF9PWR-US - OfficeConnect Managed Fast Ethernet PoE Switch User Manual page 242

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PPENDIX ROUBLESHOOTING
upgrade – Initiates a firmware download via TFTP. Follow the system
■
prompts to specify the TFTP server where your firmware can be found,
and then enter the source name of the firmware. After the file is
downloaded, the system will be reset.