3com 4800G Installation Instruction

If software loading fails, the system still runs the original version. In this case, 
check whether the physical ports are properly connected.

■

If not, reconnect them correctly and restart the loading procedure.

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If so, view the loading procedure information displayed on the HyperTerminal 
to check for input errors. If there is any input error, restart the loading 
procedure with correct input.

Common input errors include:

■

Fail to set the baud rate of the HyperTerminal to 9,600 bps when loading the 
software at a baud rate other than 9,600 bps through XMODEM.

■

Enter an incorrect IP address, software name, or path of the TFTP server when 
using TFTP.

■

Enter an incorrect IP address, software name, username, or password when 
using FTP.

If software loading fails when there are neither physical connection problems nor 
input errors, please contact your agent for help.

If you have forgotten the user password, you can enter the Boot Menu:

BOOT

MENU

1. Download application file to flash

2. Select application file to boot

3. Display all files in flash

4. Delete file from flash

5. Modify bootrom password

6. Enter bootrom upgrade menu

7. Skip current configuration file

8. Set bootrom password recovery

9. Set switch startup mode

0. Reboot

Enter your choice(0-9): 

Select 7, and then restart the switch. After the switch is restarted, the user 
password is removed.

Please contact with your sales agent.