Go to the location provided here for SmartOS firmwares. This area can also be navigated to via path ADTRAN Support Community > Software > Router/Gateway Software > SmartOS Softwarel. Click on SmartOS Generic Software button.
Here's what I get when I click your link. "You don't have sufficient privileges for this resource or it's parent to perform this action" Tried to follow directions also but I can't find Generic SmartOS anywhere. Thanks Again, Ron
This link takes me to an access denied page.
Also, the path you mentioned in the OP doesn't exist. There is no SmartOS Software option. Only Residential Gateways Software and SmartRG Firmware