Question about AVM Telephone adapter 110

We have moved and no longer have a Swisscom Digital socket, i.e. the one where the blue Ethernet cable goes directly to the router. We now have the old TT86 sockets and I thought this adapter was for an Ethernet cable that then goes directly to the router. My Bad, I hope Digitec will take it back in the worst case. But I don't have a DSL cable at the moment and I wouldn't have seen a connector on the router. Is there such a TT86 to Ethernet adapter or do I need a second one? Help xD