Planet Technology WGSW-2620P - Manual (Page 83)

Factory Default interface
3.4.9.2 System Reboot
Reboot the switch in software reset.
3.4.9.3 TFTP Configuration
It provides user to update firmware or restore Flash ROM value or upload current Flash ROM value.
TFTP Update Firmware interface
3.4.9.3.1 TFTP Update Firmware
It provides user uses TFTP to update firmware.
1. Start the TFTP server, and copy firmware update version image file to TFTP server.