@woozle Hi, I spoke to Telekom today, they couldn't really help me, it seems that there is no SFP modem for third-party router yet. I bought a Fritzbox 5690 Pro and it works fine. I will...

@woozle Ok I understand, but if this is the wrong one, how do I find out which one I need, or is it not possible with the Archer GE800?

@MrVegas76 I took a picture of the first page, it also says Telekom. And I also received a message that the connection is now active after setting it up. I'm looking forward to Telekom's solution.

@woozle That is strange, the instructions that come with the SFP modem only describe the Telekom setup, I bought a Telekom certified modem. I'll be back in the new apartment the day after tomorrow...

@woozle I have cleared the system log and reconnected. I can't read much from the log, unfortunately it doesn't tell me anything. The date and time are not correct because I have no internet...

@woozle Thanks for your support, but unfortunately that doesn't work either