I have this 1550 I got used and I can't figure out how to access it and reset it and/or upgrade the firmware etc.
I'm a little more familiar with other brand switches so I know basic concepts but not sure how to get done what I need.
I've been previously directed towards the below article here but it doesn't seem like it's for my switch.
https://supportcommunity.adtran.com/t5/General/Restoring-an-AOS-Device-to-Factory-Default/ta-p/32557
What can I do? I'm lost. TIA