If I remember correctly, Telekom only charges the 400 EUR for installation INSIDE the house. If the connection is installed on the outside of the house (outside), it's completely free. I would definitely apply for that.
I don’t really believe that.
Telekom employees also have costs here that they pass on to the customer.
Apart from the costs - how unpleasant does it look when the connection box is surface-mounted on the outside wall...
However, where Telekom makes a significant price difference is the cost for the house connection with
simultaneous signing of the telephone/internet contract and the house connection
without a corresponding contract.