H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/25
H04Q 11/04 (2006.01) G06F 15/173 (2006.01) H04L 12/56 (2006.01)
Patent
CA 1237802
- 49 - MULTIPLEXED INTERCONNECTION OF PACKET SWITCHING NODE PACKAGES Abstract A packet switching network comprises switching nodes residing on circuit packs that are interconnected by packet signal transmission links carrying multiplexed pulse-width modulated signals each representing three bits. A link incoming to a pack connects to an input port of a demultiplexer, whose output ports are coupled to packet inputs of three nodes. The incoming signal stream is demultiplexed into three serial signal substreams. Each substream is transmitted to a node for switching. A link outgoing from a pack connects to an output port of a multiplexer whose input ports are coupled to the packet outputs of three nodes. The three incoming serial signal substreams are multiplexed into a signal stream that is transmitted on the link. For multiplexed signals representing the bits of a single packet, the acknowledgment output of one node coupled to a demultiplexer is connected to the incoming link and the acknowledgment input of each node coupled to a multiplexer is connected directly to the outgoing link. For multiplexed signals representing the bits of three packets, acknowledgment outputs of the nodes that are coupled to a demultiplexer are coupled through a multiplexer to the incoming link. Acknowledgment inputs of the nodes that are coupled to a multiplexer are coupled through a demultiplexer to the outgoing link. Coupling of a packet and acknowledgment input and output pair to a demultiplexer and a multiplexer is made by a lock which alternately makes one connection while it breaks the other connection. The locks that connect to a multiplexer and demultiplexer pair operate in unison.
478236
Larson Mikiel L.
Toy Wing N.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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