A data transmission system connected to a bone implant has an extra-corporeally arranged external transmitting unit an implantable internal first receiving unit adapted to be actuated by the external transmitting unit. An internal transmitting unit is adapted to be coupled and implanted to the implant. A second transmission section is located between the external transmitting unit and the internal first receiving unit, via which the internal transmitting unit is actuated. A second receiving unit and a first transmission section is located between the internal transmitting unit and the second receiving unit. The first transmission section operates with acoustic vibrations or waves.
