3Com 3CR858-91 Router – How To Reset To Factory Defaults Settings

3Com 3CR858-91 Router Reset To Factory Defaults. You can easily reset your wireless WiFi router.  Here we are also provide Reboot methods of 3Com routers. You must reset your Wireless router to the factory defaults settings if you have forgotten your router user name or password. And you need to reboot your device if your router does not works properly.


This post will detail how to reset back to a factory default configuration the 3Com 3CR858-91. If password have been forgotten and or access to the 3Com Router is limited or configurations have been done incorrectly, resetting back to the factory default settings can assist. And also provide How to change router wireless password.



Difference between Reset and Reboot :

There is a big difference between Resetting a router and Rebooting a router. Reboot means, cycle the power to Router or Refresh the router. Resetting involves changing the router settings back to its factory defaults. Perhaps you have forgotten the password of your 3Com router and now you want to reset the password. First you need to Hard Reset the router then you can use the default password to access your router.


When you reset your router the following settings will be changed:

  • 3Com Router username and password
  • Wi-Fi username and password
  • ISP ip addresses and DNS
  • Any firewall settings you have made
  • Any portforwards you have set up
  • Generally, any configuration or settings changes that you have made to your router.



How To Reset 3Com 3CR858-91 Router With Button :

To perform a factory reset, please follow Below steps.

  • Power on the 3Com Router, place a paper clip or Pin into the hole on the back of the Router labeled Reset.
  • Hold paper clip or pin down for 10 to 15 seconds and release.
  • The Router will reboot on its own. Once the WLAN light stops blinking, the Router is reset.
  • Please Note, Resetting the 3Com router does not reset the firmware to an earlier version. It will only change all settings back to factory defaults.


d link router reset button


3Com 3CR858-91 Default Login, Password and IP :

Once your 3Com router has been reset, it goes back to it’s factory defaults Settings.

  • IP address:  or
  • Username: admin or blank
  • Password: There is no password  (leave this box blank) or 1234admin or password



How To Reset 3Com 3CR858-91 Router From Admin Control Panel  :

You need to know the Internal IP Address of your 3Com 3CR858-91 router before you can login to it. We are already placed Login details above clearly. The 3Com 3CR858-91 has a web interface for configuration. You can use any web browser (Firefox and Chrome) to login to the Router. First connect your router to PC with RJ45 Cat5 or Cat6 cable. Then login with above Credentials. After login follow below steps to Reset your device.

  • First, Go to the Maintenance or Tools or Advanced tab.
  • Then try to find Reset or Restore button.
  • Click on ” Restore Device ” or ” Restore Factory Defaults “.
  • Wait for a while, Now you are done Factory Reset successfully.


Note : If you can not get logged in to your Wireless router, here a few possible solutions you can try.

Forgot Password to 3Com 3CR858-91 Router :  If your Internet Service Provider or ISP supplied you with your router then you might want to try giving them a phone call and see if they either know what your 3Com router’s username and password are, or maybe they can reset it for you.

How to Reset the 3Com 3CR858-91 Router To Default Settings : If you still can not get logged in then you are probably going to have to Hard reset your router to its default settings. Please read starting portion of this page.



How to Reboot your 3Com Router :

Rebooting a router means cycling the power to it or refresh the router. If you want to reboot your router, follow below steps.

Method 1 :

  • Unplug the power connector from the back of the 3Com router and plug it back in.
  • Wait above 20 seconds for the router to reboot.
  • Your internet connection may be drop when your wireless router is rebooted. If someone is using a computer on your network to access the internet, you may want to warn them.

Method 2 :

  • First, Go to the Maintenance or Tools or Advanced tab.
  • Then try to find Reboot button.
  • Click on ” Rebooting ” or ” Reboot the Device “.
  • Wait for a while, Now you are done Rebooting successfully.



3Com Customer Support :

If you are still having problems, contact 3Com customer care department. Follow below links.


Customer Support (For Global Users)


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