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| Number | Title | Issue Date |
| 4775973 | Method and apparatus for a packet-switched network communications measurement matrix display Disclosed is a communications measurement matrix display for a protocol analyzer which is used to monitor traffic on a packet-switched network. The display allows the protocol analyser user to see, at a glance, a complete and accurate overview of communic... | 10/04/1988 |
| 4771424 | Routing control method in a packet switching network In a communication network, in which a plurality of switching nodes are connected with each other through a plurality of relay lines and one of the switching nodes acts as a center node for network routing, the center node estimates the state of delay of ... | 09/13/1988 |
| 4769811 | Packet switching system arranged for congestion control A method for controlling congestion in a packet switching network uses a packet dropping algorithm to determine when to drop a marked packet wherever the network is congested at any point along the path being traversed by the marked packet.... | 09/06/1988 |
| 4769815 | Packet flow control method A packet flow control method where delay data are added into an initial packet as it traverses a packet switching network, and where the receiver of the initial packet, rather than the sender, establishes a window size based on such delay data to be used ... | 09/06/1988 |
| 4769810 | Packet switching system arranged for congestion control through bandwidth management In a packet switching network, packet monitoring and marking algorithms are used for determining which data packets, received from a customer by an access node, are being transmitted at an excessive transmission rate and accordingly are marked. Additional... | 09/06/1988 |
| 4768190 | Packet switching network A communications system is described in which a large number of endpoints communicate among one another in an orderly and protocol independent manner. The system is based on a short, fixed format packet which is switched among stations and within equipmen... | 08/30/1988 |
| 4763321 | Dynamic bandwidth allocation mechanism between circuit slots and packet bit stream in a communication network System for dynamically allocating circuit slots in frames which are used for exchanging bits between users connected to nodes of a communication network linked by means of medium links having transmit and receive interfaces, the frames are delimited by fl... | 08/09/1988 |
| 4760395 | Arrangement for communications between equipment belonging to different network architectures A communications network (K) provides the integration of at least two networks with different network architectures, (SNA, DCNA, DECNET). The communications network as such exhibits its own specific network architecture (ICNA) independent of the aforement... | 07/26/1988 |
| 4755988 | Data communications switching device having multiple switches operating at plural selectable data rates A large scale integrated circuit device is disclosed that can be used as a component in a variable bandwidth branch exchange system or for other applications utilizing programmable network switching. The device contains a plurality of duplex per line swit... | 07/05/1988 |
| 4751697 | Distributed packet switching sytem A switching system including a number of switching modules each having a plurality of access ports. Incoming and outgoing packet channels are extended between each switching module and an inter-module packet switch. Each switching module includes a packet... | 06/14/1988 |
| 4745593 | Arrangement for testing packet switching networks A packet network test arrangement where a test packet is transmitted from a test source to a test destination via successive nodes of the packet network. Any node that fails to receive acknowledgement within a predetermined time of transmitting the test p... | 05/17/1988 |
| 4736363 | Path oriented routing system and method for packet switching networks A path oriented routing system and method for packet switching networks with end-to-end internal protocols. It allows switch pairs to communicate over multiple paths without packet disordering. A distributed loop-free shortest path algorithm assigns a num... | 04/05/1988 |
| 4704717 | Receive message processor for a solicited message packet transfer system A system for transferring solicited message packets between data processors coupled on a serial communications path. A solicitor processor includes a receiver message processor adapted to allocate portions of the solicitor processor memory for storing the... | 11/03/1987 |
| 4701755 | Data switching system A data switching system for processing large-capacity traffic employs a plurality of horizontal and vertical buses arranged in a logical lattice-like array having crosspoints at the intersection thereof. A plurality of data communication modules are conne... | 10/20/1987 |
| 4670873 | System for setting up data transmission circuits between a plurality of stations A system for setting up circuits for the transmission of data with a constant data flow rate between a plurality of use equipment stations. A plurality of switching units are series-connected to form a loop by way of duplex point-to-point transmission con... | 06/02/1987 |
| 4665514 | Integrated voice/data network Circuits at a remote transmission site receive digitized voice and data samples from incoming channels. The voice samples are compressed. The samples are formatted into fixed-size data blocks with signaling and control information for transmission to a sw... | 05/12/1987 |
| 4649533 | Method and apparatus for retrieving remotely located information The information retrieval method and apparatus includes a group of geographically widely-distributed terminals, which accept a remotely located host computer. Each terminal includes a memory for storing a plurality of items of call origination information... | 03/10/1987 |
| 4646287 | Idle period signalling in a packet switching system Trunk controllers (131) at each end of a trunk (118) of a packet switching system (FIGS. 1A and 1B) include an idle packet generator (1419) and an idle packet detector (1420). During idle periods, when packets are not available for transmission, the trans... | 02/24/1987 |
| 4644532 | Automatic update of topology in a hybrid network The disclosure provides improvements in effecting the routing function in a communication network operating under a distributed control protocol. Selected nodes (control nodes) have extended memory and computing capabilities and each maintains a topology ... | 02/17/1987 |
| 4638477 | Packet exchange data transmission system At least two packet exchangers are interconnected through an external transmission line to transmit a data packet. Each packet exchanger comprises a main controller for processing the data packet sent from a packet terminal, in a data link level and a pac... | 01/20/1987 |
| 4631534 | Distributed packet switching system A distributed packet switching system in which a centralized switch is not used and, instead, each transmitting port contains the intelligence required to derive and then insert the destination port and station addresses into the header of each packet to ... | 12/23/1986 |
| 4598400 | Method and apparatus for routing message packets A parallel processor array is disclosed comprising an array of processor/memories and means for interconnecting these processor/memories in an n-dimensional pattern having at least 2n nodes through which data may be routed from any processor/me... | 07/01/1986 |
| 4577311 | Packet-based telecommunication system Multiservice packet telecommunication network in which each packet has inserted in an address field thereof a sequence of addresses respectively assigned to the successive switching network included in a route from a packet sender station to a packet rece... | 03/18/1986 |
| 4569042 | Time measurements in a transmission path In a voice packet switching network (10), following call path set-up, continuity packets (500a-c) are transmitted between the call originating (100) and destination (101) nodes to check call path continuity. The continuity packets carry time stamps of the... | 02/04/1986 |
| 4550401 | Delivery information packet switching system A packet switching system having local area communication networks supporting telephone trunk circuits by utilizing delivery information. The networks utilize serial, unidirectional, broadcast-type paths to which stations are passively coupled in a sequen... | 10/29/1985 |
| 4530091 | Synchronization of real-time clocks in a packet switching system A packet switching system in which a remote real-time clock is accurately synchronized to a standard real-time clock via X.25 (CCITT) controlled high-speed transmission links. Synchronization is achieved by the transmission of an interrupt packet and a da... | 07/16/1985 |
| 4528661 | Ring communications system A communications network including a plurality of terminals coupled together to provide a unidirectional communications ring. Each of the terminals is adapted to transmit (at an associated fixed data rate) a digital signal to the next downstream terminal ... | 07/09/1985 |
| 4525837 | Digital signal transmission system In a digital signal transmission system for effecting time-division multiplexing/circuit switching transmission of data in the form of packets by means of telecommunication cable, a packet configuration and line connection control data inserted in the pac... | 06/25/1985 |
| 4507782 | Method and apparatus of packet switching It is efficient to detect a data error, which is produced in a packet switching network, in a range between final users of data. A packet including data for detecting a data error is formed for a data unit made up of a series of data packets sent to a pac... | 03/26/1985 |
| 4470140 | Distributed switching network A communications system includes a transmission medium for carrying signals divided into frames, with each frame being divided into time slots. At least three interface units interface selected equipment to the transmission medium. Each of the at least th... | 09/04/1984 |
| 4399531 | Distributed digital data communications network A distributed digital data communication network having widely dispursed nodes provides for effective transmission of messages between each node through the use of flood routing. A response message based upon stored data link status obtained when a messag... | 08/16/1983 |
| 4380063 | Flow control mechanism for block switching nodes In a communication network comprising block switching nodes interconnected by transmission links, a flow control mechanism is provided in each switching node for regulating the flow of addressed data blocks or messages. A hardware look-ahead mechanism eff... | 04/12/1983 |
| 4375097 | Transparent intelligent network for data and voice A transparent intelligent communication network having nodes and communication links between the nodes and providing improved system input features by including the sampling of customer inputs at different rates according to their output rates of data at ... | 02/22/1983 |
| 4352180 | Digital time-division multiplex telecommunication system A digital time-division multiplex telecommunication system of flexible network configuration, including line, branch, ring, and star networks. Decentralized control of channel assignment is provided. Branching nodes coupling subscriber stations into bidir... | 09/28/1982 |
| 4345326 | Switching network and telecommunications center comprising such a network When complete, the network D(p,k,a) comprises N operators each connected to p other operators of the network, p being an even integer. The N operators are located on h generatrices each comprising (P/2)k operators, h and k being any two numbers... | 08/17/1982 |
| 4276643 | Method of and means for routing binary messages through a multinode data-transmission system A digital-data-transmission system includes a network formed from a multiplicity of nodes each having at least three pairs of input/output terminals of which one is connected to an associated subscriber station while the others are connected to respective... | 06/30/1981 |
| 4271505 | Process communication link A distributed, electronic process control system is disclosed having a plurality of remotely located stations interacting to control a complex industrial process. The stations communicate via a process communication link which supports secure, multi-maste... | 06/02/1981 |
| 4129750 | Digital time division multiplex telecommunication network A digital time division multiplex (TDM) telecommunication network is described wherein the subscriber terminals are located on a common TDM highway and are served from a central office in accordance with the sequencing principle. The flow of information c... | 12/12/1978 |
| 4074232 | Data sending and receiving system for packet switching network A packet switching network in which the data transmitted from a data sending terminal is temporarily stored in a packet switching exchange connected to a data sender where the data is divided into a plurality of units each of which is called a packet and ... | 02/14/1978 |
| 4058838 | Packet-switched facsimile communications system A packet-switched facsimile communication system operable in a store-and-forward mode is provided for enabling substantially simultaneous full-duplex communication between a plurality of telecommunications terminals, such as facsimile transceivers, over a... | 11/15/1977 |
