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| Number | Title | Issue Date |
| 7349387 | Digital cross-connect Two or more cross-connect ICs are interconnected. Each IC directly receives some, but not all, of the system inputs, and outputs to some, but not all, outputs. Each cross-connect IC has a switch matrix that has the same number of inputs as the system, and a lesser n... | 03/25/2008 |
| 7292747 | Strictly non-blocking switch core having optimized switching architecture based on reciprocity conditions A switch core is set forth that comprises a plurality of duplex switches that are interconnected with a interconnection fabric to implement, for example, strictly non-blocking operation of the switch core for reciprocal traffic. In one embodiment, an N-way reciproca... | 11/06/2007 |
| 7224861 | Strictly non-blocking switch core having optimized switching architecture based on reciprocity conditions A switch core is set forth that comprises a plurality of duplex switches that are interconnected with a interconnection fabric to implement, for example, strictly non-blocking operation of the switch core for reciprocal traffic. In one embodiment, an N-way reciproca... | 05/29/2007 |
| 7035206 | Automatic isolation in loops A loop network hub port with an automatic bypass feature. The automatic bypass feature causes the hub port to enter a bypass mode upon detection of a specified loop failure initialization sequence from a node port attached to the hub port. The hub port does not prop... | 04/25/2006 |
| 7013335 | Intelligent call platform for an intelligent distributed network architecture The present invention provides an intelligent call processor, an intelligent switching node and an intelligent communications network for use in a communications system. The intelligent call processor comprises a logical platform having a plurality of functions wher... | 03/14/2006 |
| 6940851 | Scheduling the dispatch of cells in non-empty virtual output queues of multistage switches using a pipelined arbitration scheme A pipeline-based matching scheduling approach for input-buffered switches relaxes the timing constraint for arbitration with matching schemes, such as CRRD and CMSD. In the new approach, arbitration may operate in a pipelined manner. Each sub-scheduler is allowed to... | 09/06/2005 |
| 6892169 | System and method for automatically designing communications circuits A software interface used in designing communications circuits receives input from a user (20). In response, the software interface initiates accessing of a route plan (16) comprising a first route point group (38) associated with a first circui... | 05/10/2005 |
| 6879603 | Processor-based voice and data time slot interchange system A technique for performing a time slot interchange in a processor. The TSI process is surrounded by a multiplexing/demultiplexing circuit for converting a plurality of PCM highways into a single input serial data stream. The mux/demux circuit includes elastic stores... | 04/12/2005 |
| 6628651 | Communication switching techniques with improved frame format Input interfaces convert a predetermined data frame structure, such as a Sonet STS-1, into an internal format comprising a predetermined number of rows and columns, the rows being a multiple of a number evenly divisible into the bytes contained in the int... | 09/30/2003 |
| 6337859 | Non-blocking crossconnect apparatus A non-blocking crossconnect apparatus includes a primary bi-directional crossconnect device and a plurality of secondary bi-directional crossconnect devices. The primary crossconnect device has a plurality of pairs of bi-directional signal ports. A first ... | 01/08/2002 |
| 5638366 | Data transport for internal messaging A communications bus is established by connecting a plurality of transceivers to a central automatic space division switching apparatus, and connecting the transceivers in series through the switching apparatus to form a folded bus structure, one of the t... | 06/10/1997 |
| 5325089 | Two-stage, at least doubled ATM reversing switching network having (2n×2n) switching matrices Two-stage, at least doubled ATM reversing switching network having (2n×2n) switching matrices. For expanding a two-stage, doubled ATM self-routing reversing switching network, the switching matrices of the B switching stage can be respectively doubled in... | 06/28/1994 |
| 5237565 | Multiple path, self-routing switching network for switching asynchronous time division multiplex cells A multiple path, self-routing switching network for switching asynchronous time division multiplex data cells includes input ports (pi1, pi64 . . . ), output ports (po1, po64 . . . ) and switching elements (TSi1, TSi16 . . . ) arranged in a number of stag... | 08/17/1993 |
| 5185741 | Inter-network connecting system An inter-network connecting system comprising a main network having an exchange function and a subnetwork having no exchange function, to improve the expandability, economy, and efficiency of the subnetwork. When an extension line communication which is a... | 02/09/1993 |
| 5170391 | Fault detection and bandwidth monitoring means for a packet switching arrangement The fault detection and bandwidth monitoring arrangement provides a counter in association with each virtual circuit crosspoint. The counters may be provided with a common or individual threshold value which when exceeded causes alarm signals to be genera... | 12/08/1992 |
| 5115428 | Serial array time-slot interchangers A series array architecture using multiple photonic stages perform universal permutation of time-slots on a time-multiplexed photonic signal using far fewer switches than the currently known architectures. The array architectures include Serial switch arr... | 05/19/1992 |
| 4908823 | Hybrid communications link adapter incorporating input/output and data communications technology There is disclosed a data communications link adapter providing flow of data control and status information between an input/output (I/O) Backplane and a fiber optic Frontplane. The adapter represents a melding of I/O channel extender technology and data ... | 03/13/1990 |
| 4763247 | Multiprocessor system formed by microprocessor matrix A multiprocessor system in which the base module comprises 32 microcomputer modules and provides a possibility for expansion. The interprocessor exchange is realized by a four-stage interconnection network with cyclic structure, which comprises 16 communi... | 08/09/1988 |
| 4663759 | Ring back tone transmission system In a digital and electronic switching apparatus, each subscriber's circuit is provided with a loop back circuit which selectively return a downward channel signal to an upward channel in order that a ring back tone informing a calling telephone set of the... | 05/05/1987 |
| 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 lines can connect different switching matrices. Redundant matr... | 08/12/1986 |
| 4550398 | Modular self-routing PCM switching network for distributed-control telephone exchange An automatic exchange of a telephone system comprises a PCM switching network with a plurality of cascaded stages for establishing temporal and spatial connections between incoming channels on input lines of the first stage and outgoing channels on output... | 10/29/1985 |
| 4473900 | Modular structure for multistage PCM switching network A five-stage PCM switching network of an automatic telephone exchange is divided into a set of outer modular units each including a first-stage and a fifth-stage matrix, a set of inner modular units each including a second-stage and a fourth-stage matrix,... | 09/25/1984 |
| 4419753 | Network connection system An electronic exchange of the time division system type or the space division system type, employing electronic contacts, in which a U-junctor is connected to the switching network of the electronic exchange. The switching network program for controlling ... | 12/06/1983 |
| 4385380 | Digital concentrator switch In a fully digital telephone switching system, a digital switch may serve a number of PCM sub systems each having separate forward and reverse highways and each serving a number of subscribers' lines. The highways are grouped in blocks of eight, from whic... | 05/24/1983 |
| 4201891 | Expandable digital switching network A distributed control digital switching network is configured as a group switch having a plurality of stages of multiport single sided switching elements for selectively interconnecting a plurality of input terminals via the transmission paths established... | 05/06/1980 |
| 4173713 | Continuously expandable switching network A telephone central office switching network and a basic switching element utilized therein is disclosed herein. The basic switch element has the capability of reflecting traffic entering any of the inlets thereto back to any other traffic inlet and the c... | 11/06/1979 |
| 4038497 | Hardwired marker for time folded TST switch with distributed control logic and automatic path finding, set up and release A marker circuit communicating with a stored program controller and switch stages, implementing pathfinding, connect, and disconnect operations while using address, status, and data buses to control the switch through exchange of connect information from ... | 07/26/1977 |
| 4005272 | Time folded TST (time space time) switch A time folded time space time (TST) switch with the establishing of a communication through path in one direction automatically establishing a path in the opposite direction in an adjacent time slot. With one transfer through a space switch made during an... | 01/25/1977 |
