If the processor 131 determines that there is no entry associated with the identifier in the allocation table or that there is an entry associated with the identifier but does not contain an assignment (for example contains no information about a data record) or contains an update notification, the processor 131 generates a playback device request signal which the processor transmits to the server 111 via the transmitting and receiving unit 139 via a WLAN radio network. In the playback device request signal, the processor 131 communicates the identifier to the server 111 and requests a data record associated with the identifier to be downloaded into the RAM 134. The processor 131 can also use the playback device request signal to transmit a device identifier, namely its processor identifier, to the server 111 and thus identify itself to the server 111.