US Patent No: 4,962,497

Number of patents in Portfolio can not be more than 2000

Building-block architecture of a multi-node circuit-and packet-switching system

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Abstract

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A modular, substantially infinitely-growable, multi-node switching system operates under distributed control to serve integrated circuit-switched and packet-switched traffic at the data rates appropriate for each type of traffic. The system comprises a plurality of interconnected identical switching units that form at least one communication switching node. A communication switching node is a modular building block of the system; a switching unit is a modular building block of a switching node, and hence also of the system. A plurality of communication endpoint nodes--illustratively PBXs--is connected to the one or more switching nodes for communicating with each other through the switching nodes. A plurality of communication links each connect a different one of the system's switching units to either (a) one of the communication endpoint nodes or (b) a unit of another switching node. All of the links have the same communication format. Each switching node includes a plurality of different ones of the identical switching units, and a communication medium that interconnects all of the units of the switching node to allow each unit of a node to broadcast all communications received from a connected link to all of the units of the node.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
AMERICAN TELEPHONE AND TELEGRAPH COMPANYMURRAY HILL, NJ3147
AT&T BELL LABORATORIESMURRAY HILL, NJ3373
AT&T INFORMATION SYSTEMS INC.MURRAY HILL, NJ371
AVAYA INC.BASKING RIDGE, NJ2469

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ferenc, James J Boulder, CO 3 196
Goke, Louis R Austin, TX 3 201
Grimes, Gary J Birmingham, AL 72 2548
Moffitt, Bryan S Red Bank, NJ 16 412

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Bell Telephone Laboratories, Incorporated (6)
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4,488,288 End-to-end information memory arrangement in a line controller 34 1982
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4,556,972 Arrangement for routing data packets through a circuit switch 57 1983
 
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AT&T Information Systems Inc. (1)
4,631,534 Distributed packet switching system 34 1984
 
E-SYSTEMS, INC. (1)
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GTE LABORATORIES INCORPORATED (1)
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International Computers Limited (1)
4,773,067 Multi-node data processing system 9 1986
 
NORTEL NETWORKS LIMITED (1)
4,608,685 Packet and circuit switched communications network 84 1984

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
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LEVEL 3 COMMUNICATIONS, LLC (10)
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TERADATA US, INC. (9)
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FOCAL IP, LLC (8)
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EXCEL SWITCHING CORPORATION (7)
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SONY ELECTRONICS INC. (5)
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6,751,225 Port within a multi-port bridge including a buffer for storing routing information for data packets received in the port 10 1999
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HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (4)
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TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) (4)
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TELLABS BEDFORD, INC. (4)
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AT&T Bell Laboratories (2)
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CISCO SYSTEMS, INC. (2)
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CIENA CORPORATION (1)
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DIGITAL TECHNICS, L. P. (1)
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ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
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