Question about 3Com SuperStack 3 3300 TM Networking Switch

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3com 3300 TM - all Ethernet port not working, power led flashing

All Ethernet port isn't working, the power led keep flashing. All ethernet port is dead. thank's (sorry for my poor english)

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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.

Posted on Jun 21, 2007

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Posted on Jan 02, 2017

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I want to know how I can re-set my 3Com 3crwe955275 wireless access point to its default factory settings. Can anyone help?


1 Remove power from the Gateway. 2 Disconnect all your computers and the cable/DSL modem from the Gateway router. 3 Using a straight through Ethernet cable, connect the Ethernet Cable/DSL port on the rear of the Gateway to any one of the LAN ports. 4 Re-apply power to the Gateway. The Alert LED will flash as the Gateway starts up, and after approximately 30 seconds will start to flash more slowly (typically 2 seconds on, 2 seconds off). Once the Alert LED has started to flash slowly, remove power from the Gateway. 5 Remove the cable connecting the Cable/DSL port to the LAN port, and reconnect one of your computers to one of the Gateway LAN ports. 6 Re-apply power to the Gateway, and when the start-up sequence has completed, browse to: http://192.168.1.1 and run the configuration wizard. You may need to restart your computer before you attempt this. 7 When the configuration wizard has completed, you may reconnect your network as it was before

Here on page 85 of the manual
3Com 3CRWE53172 User Manual Forgotten Password And Reset To Factory...

Feb 18, 2015 | 3Com Computers & Internet

1 Answer

Port LEDs keep flashing in sequence.


The ethernet switch maybe scanning the ports for connected computers.

Nov 05, 2012 | Linksys SD208 8-Port Ethernet Switch

1 Answer

My problem is i have all yellow ports flashing in 10 3com 3300 switches in the same time. please help me


  1. Using a Null-Modem Cable , hook up the Console port of the switch to an available COM port on a computer (cable must be able to provide serial port communication between 2 computers).
  2. Set up a Hyperterminal session to that COM port (e.g.: com1), with the port settings at 9600/8/N/1/N (. When the screen comes up blank with a blinking cursor, hit [enter] once or twice to bring up a login prompt.
  3. Alternative to 1 and 2 above, if there is a known assigned TCP/IP address for the switch, one can telnet to that address, hit [enter] once or twice to get the login prompt.
  4. Default logins to try are admin/(no password) or security/security. One of those 2 should bring up the management menu.
  5. To reset factory defaults, type SYSTEM[enter] then type INITIALIZE[enter]. This will reset everything that has been set up on the switch, with the exception of the TCP/IP address, if there is one. All other previous configurations will need to be re-entered.
  6. You can type in username "3comcso" and password "RIP000". It will ask you to reinitialize the switch. This will reset all settings including passwords.

Jul 15, 2011 | 3Com SuperStack 3 3300 XM 24-Port Ethernet...

1 Answer

I have a 3 com router 3 com office connect 11g - 3crwe454g72 , my note book detects the router and signal strenghth is good too , however wi fi connectivity is not there i do not remember the password...


get an ethernet patch cable cat 6
looks like
https://www.monoprice.com/product?p_id=2115
plug it into notebook ethernet port and plug other end into your router's ethernet port . from specs it has an ethernet port only one port !
https://www.router-reset.com/reset-manuals/3Com/3CRWE454G72
then log into via a browser to 192.168.1.1 and go to wi fi security
and note the wep or wpa encryption key used
user name could be a minus sign ?
user name is -
or it is blank ie nothing typed in ?
password is admin
https://www.router-reset.com/default-password-ip-list/3Com

Sep 09, 2017 | 3Com (3crwe454g72-bundle)

1 Answer

Ethernet port not "active"


Hi there.
Restart the PC and go into the bios to make sure the on-board LAN is enabled, if it is try as jery says and try another ethernet cable.

Post back please and good luck

Apr 21, 2009 | Dell Latitude C400 Notebook

1 Answer

3Com 3c17304 port 25 up not connecting


Well I think the port is bad, I had one that did something similar to your problem. I got on the 3Com website and submitted and RMA request and they upgraded my with the newest model. But if yours is still in stock they will replace with the same type. That is what I would do. Hope this helps ya.

Feb 25, 2009 | 3Com SuperStack 3 4228G 24-Port Ethernet...

1 Answer

Doesn't POST


I've got a Superstack II 3300 24port switch, all leds are on, and led 8 blinks.
I'll let you know if I find a solution.

Dec 09, 2008 | 3Com SuperStack 3 3300 TM Networking...

1 Answer

Need to add Linksys WRT54G-TM wireless router with Linksys SPA 2102 phone adapter


your SPA2102-R seems to have one ethernet connection and one internet connection.
your WRT54G-TM seems to have one internet connection and 4 ethernet connections.

What you are trying to achive is; plug a ethernet cable into the ethernet connection on your SPA2102-R then plug the other end into the internet port of the WRT54G-TM

hope this helps, I have assumed that you intend to use a DSL broadband supplier not ADSL.

if you are changing service from DSL to ADSL then your WRT54G-TM needs to be first in line configured and working. then plug the internet port from the SPA2102-R into any of the WRT54G-TM ethernet ports.

Nov 06, 2008 | Linksys Wireless-G WRT54G Router

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