Please tell us just a bit more about yourself (studies/job, skills, usw.)!
If you wish, feel free to speak english.
Many Thanks,
I try now only to make an exception and to write this in English

I've learned communication electronics, but later that moved more away from the soldering iron to working in the maintenance of a centralized call answering machine from a cellphone provider network. Further steps were tuning speech-recognition for that provider, acceptance testing and tracking of new projects.
In private life I like small embedded thingies like arduino, raspberrypie, esp32, ... (and flaslights)
So giving my Technicolor DGA4132 a new firmware and unlocking new features is something that satifies me

regards,
Martin