ATM omstillingsindretning med et omstillingsnetværk

摘要

The ATM switching arrangement has a coupling network (ASN) an input interface unit (IIU) with an input processing unit (HTC), at least one output interface unit (OIU) contg. an output processing unit and a microprocessor. New VPI/VCI information for the further connection section is written into the cells of the incoming data flow. At least one server switching unit (SSC) has an ATM adaption layer (AAL2) switch (ASW) connected via an interface, an input processing unit and an output processing unit to the coupling network. The AAL2 switch is designed to process a maximum number of incoming connections, with a routing table for each connection. The microprocessor limits the permitted range of values of the VPI/VCI value in the ATM cell header according to the number of AAL2 routing lists, so that only the corresp. VPI/VCI coding bits are to be taken into account at the interface.