An assembly including a ticketing system comprising a plurality of devices, each device comprising a reader for reading transport tickets, each transport ticket being a contactless medium, and a system for placing in communication the readers of a plurality of devices with at least one contactless medium designed to be read by each reader, characterised in that the system for placing in communication comprises: - a plurality of upstream magnetic coupling (130, 130a, 130b, 130c), each suitable for generating an electric current induced under the effect of a magnetic field at the level of the upstream magnetic coupling device (130, 130a, 130b, 130c) and for generating a magnetic field under the effect of an electric current flowing in the upstream magnetic coupling device (130, 130a, 130b, 130c), each upstream magnetic coupling device (130, 130a, 130b, 130c) being arranged in front of a device of the ticketing system, at a sufficient distance so as to permit magnetic coupling of said upstream magnetic coupling device (130, 130a, 130b, 130c) with a transmitter-receiver device of the reader of said device; - at least one downstream magnetic coupling (132, 132a) for generating a magnetic field under the effect of an electric current flowing in the downstream magnetic coupling device (132, 132a) and for generating an electric current induced under the effect of a magnetic field at the level of the downstream magnetic coupling device (132, 132a), the or each downstream magnetic coupling device (132, 132a) being arranged in front of a contactless medium, at a sufficient distance so as to permit coupling of said downstream magnetic coupling device magnetic (132, 132a) with a transmitter-receiver device of said contactless medium; and - electric connecting means (134, 138) for electrically connecting each upstream magnetic coupling device (130, 130a, 130b, 130c) to the or each downstream magnetic coupling device (132, 132a). - a plurality of upstream magnetic coupling (130, 130a, 130b, 130c), each suitable for generating an electric current induced under the effect of a magnetic field at the level of the upstream magnetic coupling device (130, 130a, 130b, 130c) and for generating a magnetic field under the effect of an electric current flowing in the upstream magnetic coupling device (130, 130a, 130b, 130c), each upstream magnetic coupling device (130, 130a, 130b, 130c) being arranged in front of a device of the ticketing system, at a sufficient distance so as to permit magnetic coupling of said upstream magnetic coupling device (130, 130a, 130b, 130c) with a transmitter-receiver device of the reader of said device; - at least one downstream magnetic coupling (132, 132a) for generating a magnetic field under the effect of an electric current flowing in the downstream magnetic coupling device (132, 132a) and for generating an electric current induced under the effect of a magnetic field at the level of the downstream magnetic coupling device (132, 132a), the or each downstream magnetic coupling device (132, 132a) being arranged in front of a contactless medium, at a sufficient distance so as to permit coupling of said downstream magnetic coupling device magnetic (132, 132a) with a transmitter-receiver device of said contactless medium; and - electric connecting means (134, 138) for electrically connecting each upstream magnetic coupling device (130, 130a, 130b, 130c) to the or each downstream magnetic coupling device (132, 132a).