Hello @Lorenz0,

Thank you for your participation at the forum!

For security reasons, I will send you a private message with your VoIP credentials.

Best regards,

I have received from Aris the credentials (Thanks!)

I wonder if anyone can share the other parameters they have set in their FritzBox:

Username: (Should the Login go here?)
Authentication name: (or here?)
Password: (OK, was provided)
Registrar
Proxy Server
STUN Server: (Probably not used)