A system for transmitting data from two or more data streams on a communication channel between two or more devices. Roughly described, the data from each data stream is transmitted on the channel in the form of data packets, at least one data packet of one or more of the data streams being transmitted in between the data packets of the other data streams. The system is characterized in that the system comprises means to generate or process data packets for at least one of the data streams for transmission, the generated or processed data packets having a size below a certain value. Collisions between data packets of different data streams are thereby reduced.