V11 BIOS for TLSense J6412 1U. 
https://teklager.se/en/products/routers/tlsense-J6412-1u-rack-router

Instructions:
1. Extract the ZIP archive and copy the files to a USB stick
2. Connect the USB stick, keyboard, and monitor to the device.
3. Press F11 during boot. Select "UEFI" to enter into the shell.
4. type fs0: (ENTER)
5. type f  (ENTER)
6. Wait until the process finishes. At the end, you should see "FPT Operation Successful."
7. Remove the USB stick and type reset (ENTER)

Video: https://www.youtube.com/watch?v=A7pNz0sPWUc
