The invention concerns a communication system comprising a radio unit, several terminal facilities and a local administration server. The radio unit comprises a first communication interface with the terminal facilities, a second radio communication interface with a cellular network, a module for identifying a subscription to the cellular network and device for handover of multiple user streams between the cellular network and the respective terminal facilities connected to the first interface when the subscription is identified by said module. The local administration server comprises device for communication with the terminal facilities, independent of the cellular network, to supervise the exchanges over the first communication interface.