dlazure - Unfortunately, there is no hard reset button available on the NetVanta 3448.
Are you using a known working console cable? You will want to make sure that it is a straightthrough serial cable. The following link explains how you can test if the cable is good: Re: NetVanta 1234 Serial issue If you are able to get a console connection, then you will want to follow this guide to defaulting the 3448: Restoring an AOS Device to Factory Default
If you are still unable to console into the router, then you will want to call Adtran Technical Support for further troubleshooting. You can contact them in the following ways:
- Open a webticket by clicking on this link: Create a Service Request
- Open a ticket by emailing firstname.lastname@example.org
- Open a ticket by phone by calling 1-888-423-8726
I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post to unmark it and select another in its place with the applicable buttons. If you have any additional information on this that others may benefit from, please come back to this post to provide an update. If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.