Since this is a specific hardware issue rather than a consumer product, this "review" takes the form of a technical overview of the problem, why it happens, how to resolve it, and an assessment of the system's user management design.
If waiting does not work, or you have an indefinite lockout, follow these methods in order. Method 2 (Hardware Reset) is the most reliable for a true admin lockout. ibm ts3310 admin account locked
Instead of local accounts, integrate the TS3310 with Active Directory. Since this is a specific hardware issue rather
user unlock -u admin
If Method 2 fails because the service password is also unknown, you can perform a hardware factory reset. why it happens