Abstract: A communication system comprising an Asynchronous Transmission Mode ("ATM") network and at least one demultiplexing device. The demultiplexing device receives information cells which include a header, containing the destination to which the cells are to be transmitted, and data. The demultiplexing device comprises at least one input access for receiving the cells, a plurality of output accesses, at least one network circuit, a plurality of service circuits and a common data line. The network circuit has an input access, a header analyzing element, a routing table and a combining element. At least one of the output accesses are assigned to each of the service circuits. The routing table produces a routing information signal which determines the destination to which the cells are to be transmitted. The combining element combines the information signal and the data and transmits the same on the common data line.