Yes, that is all it needs, two pair unshielded twisted pair terminated with an RJ12 connection and whatever connection your wall socket supports, usually also an RJ12. RJ12 Modular Data Cable Cross-Wired 6P6C - 28AWG. The joke is that DSL is designed to be fed through poor or questionable quality infrastructure.
RJ12 Line Cord - 6 Conductor - Reverse Cable，RJ12 Telephone Line Cords - 3FT Reverse Pinned Line Cord
A reverse-pinned telephone line cord is commonly used for connecting a phone base to the wall jack. This line cord consists of 6 conductors with a PVC jacket and modular RJ12 connectors at each end.
