IMPROVEMENTS IN OR RELATING TO AN ATM SWITCH

摘要

An ATM routing switch (21) for bidirectional transmission of digital signal cells (61) some requiring integrity of transmission while others accept some loss of cells in transmission, has a plurality of output ports (30) each handling a plurality of cell queues (134-138) and control circuitry for decoding control bits (60, 62) in each input cell to determine which output port is to be used, which queue is required and whether flow congestion exists at the source of the input cell.