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How to Reset the 3com 3CR858-91

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Setup Router Staff
(Last Updated: ) | Reading Time: 2 minutes

This page guides you through the steps of resetting the 3Com 3CR858-91 router. When you reset your router it reverts to the original factory settings. This is completely different than rebooting the router which only means to cycle the power by turning it off and then on again.

Warning: Resetting your router should not be taken lightly. There are several things you need to consider first:

  • The router username and password will be reset to it's original factory defaults.
  • If you have an Internet password that also will be reset.
  • Any ISP information such as usernames and passwords will need to be re-entered. You might have to call your ISP for more details.
  • Any and all configurations you have made to this router in order to personalize it such as firewalls, and port forwards will need to redone.

Other 3com 3CR858-91 Guides

This is the reset router guide for the 3com 3CR858-91. We also have the following guides for the same router:

Reset the 3com 3CR858-91

  1. Turn off the router by unplugging the power cord.
  2. Disconnect all the computers and cables from the router. At this point there shoudl be no cords or cables coming out the back of your router.
  3. Take a straight through Ethernet cable and connect it the Ethernet Cable/DSL port on the rear of the router and attach the other end to one of the LAN ports. See figure below.
  4. Now plug the power back into the router. The Alert LED should flash as the router starts up. After around 30 seconds it should start to flash more slowly (2 seconds on and 2 seconds off).
  5. Once again remove the power from the 3Com 3CR858-91 router.
  6. Remove the cable connecting the Ethernet Cable/DSL port to the LAN port.
  7. Reconnect the computer cable to the router LAN port.
  8. Reconnect the power cord to the router and wait until the start up sequence if finished (about 30 seconds). Your router should now be reset to it's original factory settings.

Login to the 3com 3CR858-91

Now that you are finished resetting your router you need to login using the factory defaults. Use this Login Guide to help you.

Change Your Password

After you've logged in to the 3Com 3CR858-91 it's a good idea to change the router's password for security reasons. If you need help coming up with a good password, check out this Choosing a Strong Password guide.

Tip: Once you've changed the password write it down on a piece of paper and attach it to the bottom of the router for future reference.

3com 3CR858-91 Help

Be sure to check out our other 3com 3CR858-91 info that you might be interested in.

This is the reset router guide for the 3com 3CR858-91. We also have the following guides for the same router: