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7378938 Strictly nonblocking multicast multi-stage networks  
A three-stage network is operated in strictly nonblocking manner and includes an input stage having r 1 switches and n 1 inlet links for each of r 1 switches, an output stage having r 2 ...
7023841 Three-stage switch fabric with buffered crossbar devices  
A switch fabric for routing data has a switching stage configured between an input stage and an output stage. The input stage forwards the received data to the switching stage, which routes the...
6696917 Folded Clos architecture switching  
A novel folded Clos switch apparatus and method therefore for reducing the number of unemployed I/O terminals of a multistage Clos switching network by partitioning a crossbar switch to provide...
6614904 Apparatus and method for effecting a communication arrangement between switch arrays  
An apparatus is disclosed for effecting a communication arrangement of a plurality of communication circuits between first connection loci of a first switch array and second connection loci of a...
6393019 Matrix switch  
A matrix switch comprises a matrix switch main body ( 2 ), a preprocessing block ( 1 ) provided on an input side of the matrix switch main body ( 2 ), and a postprocessing block ( 3 ) provided on...
5945922 Widesense nonblocking switching networks  
A multirate network is Wide Sense Non Blocking with a new routing algorithm classifying requests into large, load greater than 1/(1+p), and small groups, where B is the upper load bound of any...
5889775 Multi-stage switch  
The present invention provides a multi-stage switch. An input or first stage receives a plurality of information signals. An output or third stage distributes a plurality of information signals. A...
5835024 Multi-stage interconnection network with selectable function switching apparatus  
The present invention addresses the limitations of prior art ALLNODE switches by including dual priority, adaptive, path seeking, and flash-flood functionalities in a single ALLNODE switch. The...
5801641 Controller for a non-blocking broadcast network  
A controller for a nonblocking broadcast switching network comprising an input stage, an output stage, and a middle stage. The input stage has N 1 or n 1 r 1 input ports and r 1 switches, where...
5754120 Network congestion measurement method and apparatus  
A communication system including a CLOS switching network, and a method for characterizing network capacity, usage, congestion, and blocking and/or near blocking states. The CLOS switching network...
5751934 Non-blocking fault-tolerant gamma network for multi-processor system  
A non-blocking fault tolerant gamma network for a multi-processor system is disclosed, including: N dual links respectively connected to n source nodes, and for transmitting data input; a first...
5572198 Method and apparatus for routing in reduced switch matrices to provide one hundred percent coverage  
A field programmable gate array in which the pattern of a first smaller switch matrix is continued into a number of other smaller reduced switch matrices necessary to provide full coverage for all...
5495476 Parallel algorithm to set up benes switch; trading bandwidth for set up time  
Benes networks are very effective in providing inter-processor communication in SIMD parallel machines, provided the communication patterns are compile-time determinable. These networks are ill...
5469154 Multiconnection switching networks  
Multi-stage switching networks for connecting any one of N 2 output ports to any one of N 1 input ports that are strictly non-blocking or are rearrangeable to provide a wide-sense non-blocking...
5451936 Non-blocking broadcast network  
The present invention pertains to a nonblocking broadcast switching network. The network comprises an input stage. The input stage has N 1 or n 1 r 1 input ports and r 1 switches, where n 1 ...
5450074 Method for setting branch routes in a three-stage cross-connect switch system  
When setting a branch route in a three-stage cross-connect switch system having a non-blocking three-stage Clos switch configuration having input stage switches, intermediate stage switches and...
5408231 Connection path selection method for cross-connect communications networks  
A method and system for finding a path through a communications matrix represents the assignment of a center stage switch through an input switch to input gates by an input stage array, center...
5396231 Modular communications interconnection  
A communications system (FIG. 7) couples together a number of entities or communications devices 710 by means of alternating stages (722, 726) of crossbar switches (712, 716) and stages (724, 728)...
5369400 Method and system for hitlessly rearranging connections in a cross-connect communications network  
A method and system for hitlessly rearranging a communications matrix and maintaining connections of previously connected signals forms an immediate and temporary connection configuration of a...
5343194 Methods and system for immediately connecting and reswitching digital cross-connect networks  
A method and system to immediately connect and reswitch connection configurations through a rearrangeable communications matrix that immediately connects an input gate causing rearrangeably blocked...
5325090 Three-stage, at least doubled atm switching network  
Three-stage, at least doubled ATM switching network. A method for expanding a three-stage, stretched and at least doubled ATM self-routing switching network, the switching matrices of the second...
5317310 Method and system for selecting an optimal rearrangement sequence for a cross-connect communication matrix  
A method and system for determining the minimum number of rearrangements for connecting an input gate to an output gate through a rearrangeably blocked communications matrix represent the...
5291477 Method and system for multicast routing in an ATM network  
Method and system for multicast routing in an ATM network including a multicast tree having a plurality of nodes interconnected by links wherein a weight representative of traffic congestion level...
5276425 Method for broadcasting in Clos switching networks by limiting the number of point-to-multipoint connections  
A process that disallows any bridging onto the signal to be broadcast from any switch of the input stage of the Clos switching network and that further disallows any requests for...
5200746 Switching module for digital cross-connect systems  
In a switching module for a digital cross-connect system, N input terminals of the module are divided into first and second groups and N output terminals are likewise divided into first and second...
5198808 Matrix switch apparatus with a diagnosis circuit having stand-by ports and reduced size matrix switching elements  
In a matrix switch apparatus with a diagnosis circuit, a switch unit is positioned between a group of input line interface circuits and a group of output line interface circuits. The switch unit...
5111200 Broadband space-division switching network with linkage in a printed circuit board having multi-layer micro-strip lines  
In broadband space-division switching networks a multi-layer p.c. board is used for wiring the switching matrices of adjacent switching stages. In case of a plurality of links between the switching...
5103220 Method of expanding a three-stage regular switching array  
A method of expanding a regular three-stage switching array. Original switching blocks of the first and third stages having a smaller number of crosspoints are enlarged to switching blocks having a...
5032837 Method for expanding N×N three-stage switching network to 2N×2N three-stage switching network  
N/n first-stage switches of an existing N×N three stage network are decomposed into 2N/n virtual switches having n inlets and 2n outlets, and N/n third-stage switches are likewise decomposed into...
4983961 Three stage non-blocking switching array  
A three-stage non-blocking switching array having twice the number of inputs and outputs for its sub-arrays of its input and output stages as the number of lines to be switched, and having one more...
4970505 Three stage switching apparatus  
A three stage switching apparatus freely connects N input terminals and N output terminals and includes a first stage, a second stage, a third stage, and a connecting circuit. The first stage is...
4914429 Switch components and multiple data rate non-blocking switch network utilizing the same  
A switching component preferably in integrated circuit form is provided. The switching component has a plurality of inlet and outlet data ports with associated inlet and outlet clock ports, a clock...
4862161 Three-stage coupling arrangement  
The present invention relates to a three-stage coupling arrangement for an electrical data exchange system in which coupling matrixes of all stages are constructed identically. The coupling...
4833468 Layered network  
A Layered Network system may provide varying cost from order NlogN low-cost networds, to completely-routing, fully-Layered networks with cots of order Nlog 3 N. Layered networks are composed of...
4821034 Digital exchange switch element and network  
A method and apparatus for a multi-channel space-division switching network capable of providing dedicated line connections from a large number of inlets to a large number of outlets for either...
4417245 Digital space division exchange  
A switching network is comprised of a plurality of identical chips and a network (control) processor. Each of the chips is a novel intelligent switch and includes both a cross point array as well...
4417244 Automatic path rearrangement for blocking switching matrix  
A method for rearranging a three stage (primary, intermediate, tertiary) switching network to permit data or digitized voice signals to be transmitted from any given primary outlet to any given...
4394541 Three stage minimum configuration conditionally non-blocking matrix  
A switching system has N inputs and M outputs and three stages of matrices. The first stage includes n substage matrices, each with x inputs and x outputs where N equal nx. The second stage...
4393381 Transfer bus matrix  
A transfer bus matrix provides a single channel of a plurality of conductors to which multiple inputs and multiple outputs are connected by ports or control gates which allow them to be selectively...
4245214 Switching matrix  
A non-blocking switching network which has considerably fewer crosspoint switches than would otherwise be expected. The network is comprised of a primary stage having n inputs and m outputs, a...
4038638 Efficient rearrangeable multistage switching networks  
Disclosed is an input-mixed rearrangeable network and an output mixed rearrangeable network. In one of the disclosed embodiments, the networks comprise three switching stages with the first...
4023141 Efficient one-sided rearrangeable multistage switching network  
Disclosed is a one-sided rearrangeable connecting network employing fewer elemental switches, or crosspoints, than prior art networks of corresponding capability. In a three stage embodiment of...
3928730 Matrix module and switching network  
A matrix module of integrated construction which is provided with electronic crosspoints, the control gates of which are connected to gate control circuits which are connected to the vertical...
3828314 END MARK CONTROLLED SWITCHING SYSTEM AND MATRIX  
Electronic switching systems employing three terminal, four layer PNPN-type thyristors having their gates brought out from the layer or region adjacent their anodes and characterized by having...
3649768 HIGH CAPACITY SWITCHING NETWORK AND CONTROL ARRANGEMENT  
A five-stage switching network comprising incoming link frames (2-stages), midswitch frames (1-stage), and outlink frames (2-stages) is provided wherein the incoming and midswitch frames are...
3582560 MULTISTAGE TELEPHONE SWITCHING SYSTEM FOR DIFFERENT PRIORITY USERS  
Known switching arrays service subscribers in either a blocking or a totally nonblocking manner. This invention provides modified nonblocking arrays to service group of subscribers, some of which...
3558826 GUIDE WIRE CONTROL CIRCUIT ARRANGEMENT FOR A MULTI-STAGE CROSSPOINT NETWORK  
A switching network is provided for establishing a connecting path through a plurality of cascaded switching stages. The crosspoint relays which are to be energized are series-connected in a...
3531773 THREE STAGE SWITCHING MATRIX  
3529097 HOMOGENEOUS MATRIX SWITCHING NETWORK  
3439125 SELF-SEEKING GLASS REED RELAY MATRIX SELECTION SYSTEM  
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