A high speed data packet switching circuit has a software controlled primary processing unit, a plurality of network interface units connected to a plurality of networks for receiving incoming data packet streams and for transmitting outgoing data packet streams, a plurality of high speed data stream...http://www.google.com/patents/US5249292?utm_source=gb-gplus-sharePatent US5249292 - Data packet switch using a primary processing unit to designate one of a plurality of data stream control circuits to selectively handle the header processing of incoming packets in one data packet stream
