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Use telnet and issue command reset system
This will reset the entire system

Hi,

This is the problem with power adopter. Please replace you adopter and let me know...

Rajeev

Download free version of HyperTerminal for Vista : ftp://ftp.hilgraeve.com/htpe/htpe63.exe
Make a new connection :
connect using COM1 (depends of your configuration)
19 200 bits/sec
8 data bits
No parity
1 stop bit
No control of flux

And push enter twice to display a "Login:" prompt.
Connect using default user/passwords : http://support.3com.com/infodeli/tools/switches/ss3/management/ug/setup.htm#13131

Regards,

AstroMan

You forget the password for the "admin" user account and can no longer perform important management operations. Use the password recovery method outlined below to define a new password for the "admin" user account:

1. Access the Command Line Interface from the console port and enter the user name "recover" and password "recover" to place the Switch in password recovery mode. The Switch remains in password recovery mode for a maximum of 30 seconds, before it returns to the CLI login prompt.
   
   You must use the console port to recover the passsword. If you attempt the recovery method using the network, the password will be rejected.
   
   
2. Perform a hard reset on the Switch whilst it is in password recovery mode by switching it off, waiting a few seconds, and switching it on again.
   
   You cannot use a soft reset operation to reset the password of the "admin" user account. This will end the password recovery procedure and return you to the CLI login prompt.
   
   
3. When the Switch has rebooted following the hard reset enter a new password for the "admin" user account.
   

I haven't worked with these switches but generally settings such as ip address and factory defaults can be set through the Console Interface (CLI). You will need a null-modem cable to access this and a terminal client (Windows Hyperterminal works).

Hope that helps

switch dont restart by themselves without command, first remove the switch from the network, disconnect from internet, make sure you hadn't fired anybody recently it sounds like a hack. reduce network traffic to local area only and priortise important internet traffic. now got back to the switch and troubleshoot make to check the reboot command on error or when error is found, if the problem stops when the switch is remove somebody is messing with the network.or the darn switch is faulty install a new one.

VLAN configuration is able to do in the layer 2 swicth.

You Could check to see if it has a passowrd and username as 3com or user as username or password thats wat mine is and i forget my pass

You might consider trying to upgrade the BIOS's on the affected switches

A blinking power LED means that the switch is either downloading software, or is initializing which also includes running the Power On Self Test. You may have firmware issues with the switch and/or the switch is stuck in initialization mode. You may have to contact 3com regarding a warranty issue. Hope this helps. Good luck.

Hello Mike, Are you able to log into the web interface of the product and see the data statistics for the ports? This switch has a web management interface, so I'd advise logging into that to see what's actually happening to each port. Take a look at that and get back to me with your findings. If you find that you can't access the web interface, there may be another issue we need to look at. Let me know how you get on. Thanks reaxion

https://community.hpe.com/t5/Comware-Based/Firmware-for-3com-Switches/td-p/7000310#.YPrrkI5KiUk https://www.google.com/search?q=2948-SFP+Plus+firmware ..

Ok it is may be do you to system is old needs up to date , so that the video may not have downloaded completely from the source web portal. The media player present in your handset is outdated.

can i have your modal number for your 3COM webcam and what is your PC OS (Windows 7 or windows XP)?