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6958598 Efficient switching architecture with reduced stub lengths  
A switching topology for communicating signals in an automatic test system includes a plurality of switching circuits each for selectively passing signals or crossing signals. Switching circuits...
6707907 Digital-cross-connect system single element restoration technique  
Restoration of an inoperative network element (12) such as a digital cross-connect system is accomplished by receiving updates from each element as they occur in a local controller network (18)....
6597784 Compact distributing frame with automated interconnection capability  
An automatic main distributing frame, which can easily maintain the size accuracy required to insert into a through hole of the conductive pin is provided. The main distributing frame includes a...
6034956 Method of simultaneously attempting parallel path connections in a multi-stage interconnection network  
The multi-stage interconnection network of the present invention includes the use of switches in the first stage that have parallel path seeking capabilities. With these switches, a directed...
5774067 Flash-flooding multi-stage interconnection network with parallel path seeking switching elements  
A multi-stage interconnection network includes the use of switches in the first stage that have parallel path seeking capabilities. With these switches, a directed flash-flood can be instigated...
RE35483 Switching matrix crosspoint  
A crosspoint for a switching matrix constituted by enhanced P-channel and N-channel MOS transistors. Each input line conductor (Ii1 and Ii2) is connected to an input of a first differential...
5588121 Parallel computer having MAC-relay layer snooped transport header to determine if a message should be routed directly to transport layer depending on its destination  
A parallel computer system comprises a number of processing elements, at least one communication element, an internal network interconnecting the communications and processing elements, at least...
5457740 Cross point mixer for a telephone set  
Disclosed is a cross point mixer including a cross point switch and a mixing circuit provided on the output side. The cross point switch includes n×m switches arranged in a matrix manner. Each of ...
5425094 Cross point switch with power failure mode  
A cross point switch mounted on a telephone-related device such as a telephone. When an alternate power source request signal is low, switches are controlled in response to external data. When the...
5371786 Electronic cross-connect system  
Disclosed is a cross-connect system, such as a feeder distribution interface for telecommunications. User and feeder wires are each coupled to two sides of the matrix in order to provide...
5210529 Bit finder circuit  
A circuit to find the first bit 0 or 1 in an m-bit input word from a start bit onwards, the positions of these bits being defined by an n-bit code. It includes a crosspoint matrix of m (4) rows and...
5150083 Digitally controlled monolithic switch matrix using selectable dual gate FET power dividers and combiners  
There is described a 2×2 switch matrix which includes four 1×1 switch matrix modules. Each 1×1 switch matrix module consists of an active power divider switch (APDS), an active power combiner sw...
5047766 Broad band signal switching matrix  
In a broad band signal spaced coupling device comprising a cross point matrix whose switching matrix elements are respectively controllable by a decoder-controlled, cross point-associated memory...
5043724 Broadband signal switching equipment  
A broadband signal switching equipment constructed in field effect transistor technology has gates at the inputs of the switching point matrix, and output drive circuits having threshold values at...
4973956 Crossbar switch with distributed memory  
A crossbar switch is constructed in monolithic integrated circuit form together with respective memory cells controlling each of the component crosspoint switches in the crossbar switch. The memory...
4839643 Broadband signal switching equipment  
Switches having a relatively high forward resistance are provided in a broadband signal switching equipment comprising a crosspoint matrix constructed in field effect transistor technology and...
4803720 Dual plane cross point switch architecture for a micro-PBX  
The invention is a software reconfigurable cross point switch which selectively interconnects a plurality of phone lines and a plurality of shared resources such as call progress monitors, dual...
4792801 Broadband signal space coupling device  
In a broadband signal space switching device comprising a cross point matrix whose switching elements are respectively controlled by holding storage cells selected by cross point-associated means...
4785299 Broadband signal space switching apparatus  
In a broadband signal space switching device comprising a crosspoint matrix constructed in FET technology whose switch elements are respectively controlled by a cross-point-associated memory cell...
4745409 Broadband signal space switching device  
In a broadband signal space switching device, the respective switching elements are controllable by a decoder-controlled, crosspoint-associated memory cell and are respectively formed with a CMOS...
4731594 Planar active component microwave switch matrix and air bridge for use therewith  
A microwave planar switch matrix for selectively connecting various ones of M inputs to N outputs. The switch matrix includes a semi-insulative substrate on one side of which are conductors...
4682127 Ultra-high frequency signal switching matrix having active component switching junctions  
The invention relates to an ultra-high frequency switching matrix. Only active components, i.e. field effect transistors, are used in the integrated circuit construction of the matrix according to...
4670901 Single or multi-stage switching field for telephone exchanges  
A multi-stage switching-field formed with switching matrices containing thyristors for stored program controlled switching devices, established by reversal at the last stage, without the use of...
4638123 Circuit arrangement for a small PABX with a switching matrix that has electronic crosspoints  
In a small PABX with a switching matrix that has electronic crosspoints, integrated selector components comprising multiplexers or demultiplexers in C-MOS technology are used for the switching...
4605928 Fault-tolerant array of cross-point switching matrices  
A cross-point switch comprising an array of cross-point matrices 60, 62, 64, 65 in which the internal lines 22-32 are connected to external lines 45-54 by tri-state buffers 36-44. The external...
4600813 Line concentrator  
A concentrator for telecommunication lines uses a crosspoint matrix (100) incorporating semiconductor switches. A number of subscriber lines (1-14) are inputs to the matrix, and a smaller number of...
4570154 Data entry keyboard apparatus  
A data entry keyboard apparatus comprises a key-switch array (900) and associated electronic logic circuits (941). The key switches (901) of the array are so interconnected with each other and with...
4437096 Concentrator circuit incorporating solid state bilateral bridge arrangement  
A bilateral, low loss, wide band, concentrator circuit selectively controls the transfer of a signal between one of a plurality of first terminals and a single, second terminal. The balance points...
4264895 Multi-stage switching network controlled by at least three logical inputs  
A multi-stage switching network comprises a plurality of unitary switch matrices each including a number of cross-point circuits each of which in turn includes a memory circuit operatively...
4197428 Segmented matrix type switching device with simplified control  
Low-level, wide-band signals e.g. for use in telephone transmission are switched in a matrix device. The overall matrix is subdivided into elementary matrices of smaller size and each inlet of the...
4190743 Thyristor switching matrix  
In a thyristor switching matrix, each horizontal line (Hl to Hm) is connected via a protective device (e.g. A1, A2) to a DC source--U. The protective device (A1, A2) normally isolates the...
4188509 Tone signalling arrangement for a telecommunications exchange  
A telecommunications exchange having a multiple stage switching network. Calls initiated within the exchange may be local calls to be completed internally, may be trunk calls to a central office or...
4184054 Key telephone system  
A key telephone system is provided which comprises: a plurality of key telephones; a key service unit; a plurality of transmission paths each including a first transmission cable for transmitting a...
4156153 Electronic switch  
An electronic switch comprised of a C-MOS transistor is described. Associated with this transistor is a network consisting of MOS transistors which prevents the C-MOS transistor from being...
4150258 Electronic switching system  
In a telephone exchange system comprising a time division exchange system and space division concentrators connected to said exchange system with a PCM lines, said concentrators are controlled by...
4132868 PABX System providing multiple paths held between calling line circuits and a plurality of output circuits  
A unique private automatic branch exchange system wherein a plurality of paths from the calling line circuits are established through the switching matrix to more than one output circuit. The paths...
4128742 Rugged crosspoints for communication systems  
A bilateral solid-state crosspoint for use in a telecommunications switching network is disclosed comprising a pair of Darlington connected pairs of transistors connected in a complementary...
4128741 Electronic crosspoint array  
A cross-point array for telecommunication systems, produced as an xy-matrix in a monolithic substrate with switching means arranged at the cross-points between the x and y conductors in the form of...
4113989 Electronic telephone system featuring switching networks having thyristors for single-wire switching  
An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuits, a plurality of trunk and tie line circuits, at least one...
4110566 Switching network control arrangement  
A thyristor switching network is disclosed in which the switching network control provides both crosspoint audit and centralized control capabilities. The switching network control circuit contains...
4107472 Semiconductor channel switch  
A plurality of PNPN switches, each permitting current flow in either, i.e., positive or negative, direction, are arranged at the cross points between the rows and the columns of the speech paths so...
4105871 Electronic telephone system featuring a customer memory within a central control unit connected by bus lines  
An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuits, a plurality of trunk and tie line circuits, at least one...
4105873 Electronic telephone switching system comprising a speech path switching matrix and tone-connecting switching matrix and employing electronic crosspoint switches  
An electronic telephone switching system is described having peripheral units including a plurality of subscriber and line circuits, a plurality of trunk and tie line circuits, at least one...
4096399 Crosspoint bias circuit arrangement  
A semiconductor transmission circuit arrangement which utilizes symmetrical transmission transistors and bias circuitry which exhibits a high output impedance and is arranged to maintain equal d.c....
4093828 Switching networks, e.g. space-division concentrators  
A switching network comprises a matrix of cross-point switches disposed in a pattern at selected ones of the cross-points in an array of mutually othogonal inlets and outlets. The pattern of...
4088840 Electronic cross-point matrix telephone private switching equipment  
A telephone private switching equipment of the space-division operated type comprises a matrix of electronic switch cross-points each made of a single controllable two-state member connected across...
4087645 Telephone switching system  
A telephone switching system utilizing matrices composed of monolithic chips which include a plurality of cross points and controls therefor. The lines and trunks attached to the unique matrices...
4079206 Switching arrangement for a telephone system for connecting a calling subscriber set to an idle connector set upon recognizing a loop in the connector set  
A switching arrangement for a telephone system, wherein a subscriber circuit is connected over crosspoints of corresponding switching matrix stages to a junctor circuit feeding said subscriber...
4075431 Speech path system  
A speech path system for a telephone exchange having crosspoint switches of a speech path network comprising semiconductor switching devices of four or more layers, including a memory circuit for...
4068215 Cross-point switch matrix and multistage switching network using the same  
A plurality of cross-point matrices each having a plurality of holding circuits respectively associated with a corresponding cross point are arranged in multiple stages, which are linked with each...
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