Hi @meier,
We have created articles which should address most of the queries you have.
These articles contain information regarding TPG's basic modem configuration settings and how the equipment must be set up.
This also includes a list of other TPG equipment that you may be able to use in the future:
How to set up Huawei HG 659 modem for Windows 10
List of all TPG broadband setup and modem guides on Community
Let us know should you need further assistance.
