Open the HyperTerminal and set the serial port parameters as: baud rate 2400(9600), 8 data bits, 1 stop bits, no parity check and no flow control.
Enter, the system will prompt: user name. At this time, press the reset button on the network card with a fine needle, and the status light will flash green and orange alternately. Then press the reset button again, and the status light will go out. Press Enter quickly at this time. When prompted for the user name again, enter lowercase apc. There will be a password prompt after input, and also input lowercase apc.
The whole process of step 4 needs to be completed within 30 seconds. If it is delayed, you need to repeat step 4.
After entering the network card menu, select System-> Usermanager modifies the user name and password again, and then selects Advanced-Accept the changes and save the settings.