The contractual summary which must be provided free of charge before signing the contract must contain the sums owed for the activation of the service.
Find out more about the contractual summary.
The operator is not responsible for the internal cabling of your private installation, but it has signed a contract with you and it must be able to guarantee that you are receiving the services promised in the contract.
Under all circumstances, the operator must inform you, before signing the contract, of the services it can offer you and the costs relating to the installation and activation.