download the firmware into tftp data directory
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6.
In the telnet terminal, do the following command
1. __dmctw
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2. cd /config_fs
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3. rm -f wg25*.bin
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4. tftp –g –r wg25.2.0.bin 192.168.123.111
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4. copy firmware successfully
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5. reboot
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7.
Check whether the system was recovered or not
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