Abstract: A data reception unit for receiving a plurality of data streams over a data channel, the data streams being received as amounts of data and each amount of data comprising a data portion including data from a data stream and an identity portion identifying that data stream, the data reception unit comprising: a data stream memory comprising a plurality of data stream storage areas, each for storing data from a respective one of a set of the data streams, and an escape buffer; a first storage information memory for holding first storage information for facilitating storage in the respective data stream storage area of data from the set of the data streams; and a data storage controller for, for each received amount of data, receiving the identity portion of the amount of data and performing a storage operation comprising: accessing the first storage information memory; and if the first storage information memory holds first storage information for the data stream identified by the identity portion, storing the