Abstract: The invention relates to an asynchronous time-division multiplex transmission system comprising an interconnection element, which element transmits cells supplied by auxiliary lines (6) and destined for a trunk line (8) at a preset interconnection element transmission rate and which comprises cell filters (7) coupled to each of the auxiliary lines, which filters pass the cells for storage in intersection buffers (15) coupled to each cell filter when the path identification contained in the cells is allocated to the trunk line. An output buffer (17) supplying cells to the trunk line is connected to the outputs of the intersection buffers. The cells are transmitted between the intersection buffers and the output buffer at a temporary transmission rate which is increased relative to the element transmission rate.

Abstract: In the future, integrated wideband networks, especially the arrangement of switching networks and switching network controls, will be of particular importance. To avoid bottle-necks in the switching network a number of different measures or combinations thereof are taken. These measures include that: a) the transfer rate of the switching network is enlarged by a structural change; b) the switching network is multiplied; c) the input buffers are re-arranged; and d) the allocation strategy is changed.

Abstract: A switching module comprises input buses (1--1 , . . . 1-n) and at least one output bus (2-ij), in which each input bus, for data packet transmission, is connected to the output bus by means of a crosspoint switch (4-i). Each crosspoint switch (4-ij) has a unique address and a request output (61) for sending out a request signal. The switching module further includes allocation means (3-j) which place empty packets having the unique address of a crosspoint switch (4-ij) onto the output bus (2-j). The allocation means (3-j) comprise recording means (105,201) for receiving the request signals and include a FIFO (107,206) for storing representatives of the unique crosspoint switch addresses that are derived from the request signals. The allocation means (3-j) further include a packet generator (103) for deriving addresses from the representations from the queue store (107,206) and allocating these addresses to the empty packets.

Abstract: For avoiding overload in a wideband switching system, in which the messages are subdivided into blocks and transmitted over wideband transmission links according to an asynchronous time-division multiplex method, it is known to arrange bidirectional counters assigned to the different subscribers in the switching nodes. By means of the count of the bidirectional counter it can be easily verified whether the maximum and mean transmission rates determined by the subscriber station are adhered to.For avoiding overload and for charge-metering the switching node comprises two up-counters--in lieu of one bidirectional counter--for each subscriber station. This enables establishing both the duration of the connection and the number of blocks transmitted during this connection. From the ratio between the counts a criterion is derived to recognize overload.