Driver download via the QR code on the packaging. Windows 11 with latest updates does not recognize the hardware by itself via Plug & Play. After installing the driver, I connected my laptop to Fritzbox via the cable - unfortunately without success.
This happens the same on Frizbox. Most of Fritzbox is using 4-pin 2.54mm pitch Serial Console 3.3 V. instead of DriverGenius U2RJ45-A/C 8-Pin design.
On https://boxmatrix.info/ we only found the rough information as following.
|Property:||RS232-4xNC - type Boolean||Wiki||Freetz||IPPF||whmf||AVM||Web|
|Location:||Box-Models >> Interfaces|
|Defines:||Whether the model has a drilled internal 4-pin Serial Console interface or not|
Suggest consult Fritzbox Technical Support for the right Console Cable definition.