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7529357 Inmate management and call processing systems and methods  
Disclosed are systems and methods that provide centralized or nodal inmate management and telephone call processing capabilities to controlled environment facilities. An inmate management and call...
7424011 Rearrangeably nonblocking multicast multi-stage networks  
A rearrangeably nonblocking multicast network 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 switches and n 2 outlet links...
7248680 Computer-based method and apparatus for controlling, monitoring, recording and reporting telephone access  
A telephone station interface is provided with apparatus for detecting when a called party has or is attempting to patch or bridge one telephone call with another telephone call. The detecting of...
7203306 Apparatus and method for providing switching at a telephone cross-connect  
A cost-effective technique for inserting a switching module into a line pair of a local telecommunications network is disclosed. In particular, the illustrative embodiment does not replace a...
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...
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...
6510222 Miniature connector array  
A line multiplier is formed of n upstream lines and m downstream lines where m>n by providing a micro-technology array of m×n crosspoints switches using, e.g., magnetic latching, wherein the...
5798580 Contention free global interconnection  
Contention free switches, networks and global interconnection systems for routing messages from N input sources to M output destinations are disclosed.
5500753 Method and system for connecting an optical network unit with a plurality of user sites  
A method and system to connect an optical network unit with a plurality of user sites. The invention includes the steps of and circuitry for connecting a plurality of line circuits to a...
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...
5343193 Matrix switcher apparatus  
This invention provides a matrix switcher apparatus adapted to arbitrarily distribute signals in a plurality of input channels to a plurality of output channels. The matrix switcher apparatus...
5319639 Crossbar with return net for scalable self-routing non-blocking message switching and routing system  
A crossbar useful for self-routing messages is described having a return network that can return all messages, or their headers, that encounter a busy node at the output. A system is described in...
5072217 One-sided crosspoint switch with distributed control  
In a one-sided crosspoint switch, multiple controllers are used instead of a single controller for control of the switching matrix. The controllers operate in parallel, thereby handling requests...
4635250 Full-duplex one-sided cross-point switch  
A full-duplex one-sided switching chip comprising externally connected lines as input/output pairs and pairs of bi-directional interconnection lines. Duplex cross-points selectively connect...
4482817 Bilateral electronic switch  
A bilateral, low loss, wide band, switching circuit controls the transfer of a signal between two terminals. The balance points of a bilateral current gate connect to the terminals. A rectifier...
4360809 Matrix switch and method of controlling cross point switch of a matrix switch  
The matrix switch comprises a plurality of input lines (Y 1 -Y 4 ), a plurality of output lines (Y 1 -Y 4 ) and a plurality of crosspoint switches for selectively connecting one or more input...
4353066 Channel switching network  
A channel switching network, in which each cross-point of a switch matrix is constituted as a channel switch of balanced type using two PNPN semiconductor elements. Each of the two PNPN...
4266100 Monolithically integrated semiconductor circuit  
A monolithically integrated semiconductor circuit, provided for coupling arrangements having symmetrical cross points, comprising two through switching NPN transistors, and a composite circuit for...
4163159 Attenuation-free electronic switch  
Electronic switch for use as a crosspoint in switching networks of space-division telephone exchanges where it is connected to function as an open circuit stable negative resistance provding...
4082923 Semiconductor speech path switch  
A plurality of sets of thyristors, each set consisting of two thyristors connected in inverse parallel configuration, are arranged in the form of a matrix to provide a switch of balanced or...
4053716 Switching network with a crosstalk elimination capability  
A switching network having particular application in telephone exchanges is provided with crosstalk elimination capability. The crosstalk is effectively cancelled by generating signals which are...
4051391 Current-operated circuits and structures  
Current-mode OR gates useful, for example, in telephone cross-point switch systems. A current-mode OR gate withdraws an output current of predetermined level at its output terminal whenever an...
4035773 Control of leakage currents in a switching matrix  
A switching matrix arrangement using magnetic latching reed relays is disclosed, wherein similarly numbered switch groups and verticals are connected in common and are driven simultaneously with...
4032892 Semiconductor speech channel switch  
A semiconductor speech path switch selectively connects a transmitting circuit which is connected with a row line to one of a plurality of receiving circuits which are respectively connected with...
4025726 Cathode gate triggering method and system for speech path switches  
A cathode gate triggering method and system for speech path channel switches using m × n PNPN switches as switching elements, in which l × n PNPN switches in each switch array connected in common...
4015190 Controllable negative resistance electronic switch arrangement  
An electronic switch arrangement reverses damping of an electronic switching element by means of a controllable negative resistance. Adjustment of the negative resistance is provided by comparing a...
3993874 Multi-stage switching networks for use in telecommunications exchanges  
A bi-directional switching network for a telecommunications exchange in the form of a matrix array of symmetrical switching devices each having many terminations at opposite sides. The switching...
3931475 Electronic switches and switch networks  
In an electronic switching device for use as the switching component of a switching network in a telephone central office, the device being composed of a switching transistor connected in series in...
3909546 Arrangement for connecting exchange lines to switchboards in telephone systems  
The complexity and cost of the switching grid used for connecting m exchange links to n switchboards can be reduced if it is formed by a main matrix with m. n crosspoint relays each having many...
3886369 Solid-state gating circuit for cross-point switching  
A solid-state gating circuit used as a cross-point switch for opening a signal circuit in a telephone network is disclosed. The gating circuit includes a light emitting diode connected in series...
3872439 Electronic switching circuit for bidirectional transfer  
A switching means operable to effect selective bidirectional signal transfer between a first and a second signal terminal includes amplifier means controllable between an inhibited condition and an...
3859471 REED SWITCH COMMUNICATION NETWORK ENSURING OPEN CONTACTS BEFORE CLOSURE  
A switching network is disclosed which employs magnetically operated sealed reed switches having reeds of a remanent magnetic material. Circuitry is included in the control portion of the network...
3812302 TEST DESK INCLUDING A MANUALLY CONTROLLED CONNECT MATRIX  
A test desk is equipped with pushbutton controls and a manually controlled connect matrix for establishing connections between any one of a number of test circuits and any one of a number of test...
3778554 SINGLE THREE-WIRE-PORT PBX INTERCOM TRUNK CIRCUIT ARRANGEMENT  
A single three-wire-port PBX intercom trunk circuit supplies battery, ringing, and supervision through a switching network from the trunk circuit to a pair of interconnected stations. The intercom...
3763325 MAIN DISTRIBUTING FRAME MANUAL SWITCHING NETWORK ARRANGEMENT  
A telephone system comprising conventional station apparatus (outside plant) and associated conductors and conventional central office equipment (inside plant) and associated conductors is provided...
3739101 CROSS FIELD SYSTEM WITH BISTABLE POLARIZED RELAYS  
A switching arrangement for telephone exchange installations having coupling multiples of the cross-field type constructed using coupling contacts of bistable polarized coupling relays,...
3725863 BALANCED SEMICONDUCTOR SWITCHING NETWORK CIRCUIT AND CONSTRUCTION  
A circuit organization and construction for a solid state, balanced switching network which compensates for the inherent capacitance presented by inactive crosspoint elements. Intersecting tip and...
3666892 SPEECH GATE  
An audio frequency gate is disclosed for use in an electronic PABX. In particular, the gate enables the efficient transmission of speech and multi-frequency tones between components which are...
3651273 CIRCUIT ARRANGEMENT FOR COUPLING, HOLDING AND RELEASING OF CROSSPOINT RELAYS IN A CONNECTION PATH IN TELECOMMUNICATION SYSTEMS  
A marking and holding circuit for cross-point relays in a plural stage communications switching network. In each stage, the winding of the cross-point relay is held through an individual hold path...
3581018 MULTISTAGE TELEPHONE SWITCHING NETWORK  
A telecommunications exchange in which connections are set up through cascaded stages (designated A, B, C & D) of coordinate switching matrices. Certain of the stages are paired in two-stage...
3551754 SENSITIVE PICK-UP RELAY  
3550088 CONTROL MEANS FOR TRANSISTOR SWITCHING MATRIX CIRCUITS  
3524167 MAGNETIC MEMORY SWITCH AND ARRAY  
3518626 MAGNETIC MEMORY SWITCHING DEVICE,PARTICULARLY FOR TELEPHONY  
3516064 SWITCHING GRID MATRIX WITH CROSSPOINT ELEMENTS,CONTROLLED BY MARKING PULSES BEING VERY SHORT COMPARED TO THEIR RESPONDING PERIOD  
3499122 TELEPHONE SWITCHING MATRIX WITH PHOTORESPONSIVE SWITCHING ELEMENTS  
3444328 COUPLER CIRCUIT HAVING VOLTAGE RESPONSE SWITCHING MEANS AT CROSS-POINTS THEREOF FOR TELEPHONE EXCHANGE COUPLING FIELD  
3414680 Electronically controlled crossbar switching network  
3385935 Key telephone system  
Matches 1 - 50 out of 79 1 2 >