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Large fault tolerant packet switch particularly suited for asynchronous transfer mode (ATM) communication

  • US 5,130,984 A
  • Filed: 12/18/1990
  • Issued: 07/14/1992
  • Est. Priority Date: 12/18/1990
  • Status: Expired due to Term
First Claim
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1. Apparatus for a packet switch comprising:

  • a plurality of input modules, wherein each of said input modules provides a plurality of input ports and a plurality of outputs and applies incoming packets from said input ports to said outputs in a first pre-defined fashion, each of said incoming packets having first and second distinct address portions and a data portion therein;

    a plurality of output modules, wherein each of said output modules has a plurality of inputs and provides a plurality of output ports and applies in a second pre-defined fashion data portions of outgoing packets from said inputs to said output ports;

    a plurality of cross-point switching circuits, wherein each of said switching circuits is connected to a corresponding output of each of said input modules and to a corresponding input to each of said output modules, wherein each of said switching circuits comprises;

    means, responsive to the first address portion of each of the incoming packets applied over said corresponding output from any of said input modules, for establishing for said each incoming packet a route through said switching circuit and over said corresponding output to an addressed one of said output modules; and

    wherein each of said output modules comprises means, responsive to the second address portion contained within a packet applied to said each output module by any of said switching circuits, for applying the data portion contained within said applied packet to an addressed one of the plurality of said output ports associated therewith.

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