Sorry, never used TV or made manual manipulations in config (although this is possible with little knowlegde how to do).
What I know for sure is that here (in my coutry) the config for TV is done by provider from ACS.
And there is no workaround for it and you wont get credentials too, even if you are able to modify config on your own.
You could analyze a working box cofigured for TV for this provider and might patch your config accordingly.
Passthrough mode wont help I think, but maybe even worth a try.
It might be similar to manually config VoIP, where you are able to set different VLAN-ID in advanced telefony connection settings, but nothing to do this for TV in GUI.
Most knowledge about AVM-boxes are found in ip-phone-forum.de, possibly they could help.
PS: Why is your posting under mine, I already saw it when writing and #21536 is less than #21537?
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