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5933412 |
Parallel connection control
Parallel connection control ("PCC") processes and switching networks are described. Various aspects of these PCC processes and networks relate to the provision of an alternative switching...
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5926456 |
Path changing system and method for use in ATM communication apparatus
An ATM path changing system and method for use in an ATM communication apparatus and ATM communication network are provided which can set an alternating route in the event of a failure occurring in...
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5923643 |
Redundancy, expanded switching capacity and fault isolation arrangements for expandable telecommunications system
Redundancy, expanded switching capacity and fault isolation arrangements for use with an expandable telecommunications system. An inter-nodal network connects a plurality of programmable switching...
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5905714 |
Method for rerouting a packet-mode data connection
A method for rerouting a packet-mode data connection, especially a frame relay network data connection, in which, traffic transmitted between two nodes is transferred from a first route to be...
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5898667 |
SS7 network management primeship
A signaling transfer point (STP) includes a communications controller, node maintenance unit, and a plurality of link-interface units, and designates to the individual link-interface units primary...
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5898691 |
Method and apparatus for congestion distributed adaptive routing
A method for scheduling a connection through a node is disclosed. A resource request message is received from a master. An identity of a trunk where the resource request message is to be issued is...
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5854786 |
Method and apparatus for distribution/consolidation (DISCO) interface units for packet switched interconnection system
A packet switching architecture provides for a switch system comprised of a cellular base station in communication with the PSTN through a switch. Data packets are routed through the switch system...
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5848053 |
Telecommunications network for serving users from multiple switches
A method or apparatus for offering multiple switch access to selected lines and trunks of a multiple telecommunications switch complex. The selected lines and trunks are connected to peripheral...
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5844887 |
ATM switching fabric
A distributed, scalable and modular asynchronous transfer mode (ATM) switching fabric is disclosed. The switching fabric includes port interface modules for connecting physical devices to the...
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5832196 |
Dynamic restoration process for a telecommunications network
The invention is a generalized process for dynamically restoring traffic in the event of an outage in a telecommunications network. A Centralized Processing System (CPS) receives alarms from...
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5809011 |
Method for rerouting a packet-mode data connection
The invention relates to A method for rerouting a connection-oriented packet-mode data connection, especially an ATM network data connection. In the method, traffic to be transferred between two...
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5790048 |
Crosspoint switch with bank-switched memory
A crosspoint switch routes signals between its terminals in routing patterns defined by routing data from a host controller. The crosspoint switch includes an array of pass transistors. Each pass...
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5784357 |
Packet switching system
The invention relates to a packet switching system comprising a plurality of inlet circuits which are used each for multiplying a cell coming in by an inlet line, which are provided for...
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5781529 |
Systems and methods for routing ATM switched virtual circuit calls
The invention routes SVC ATM call setups by utilizing one of a plurality of designated transit lists (DTLs) stored at an originating node. The DTLs describe all routes in the network from the...
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5781528 |
Path switching system and method
A path switching system and method for a multiple-node ATM network, in which a plurality of paths can be simultaneously switched preserving proper correspondence thereof. A key choosing unit...
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5777983 |
Asynchronous multiport controlling technique for a single system of a remote security administration system
An asynchronous multiport controlling technique in a single processor of a remote security administration system, for example, including a scanning unit, a VAN (value added network) main unit, an...
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5777995 |
Translator chip for a wideband network
A translator in an element of a wideband network transforms a format restored by a CCITT information cell into other predetermined formats. It performs this function by inserting cells from a...
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5768256 |
Communications system and method providing optimal restoration of failed-paths
A system and method for restoring communications between a pair of nodes, between which communications have been broken, in a network. The method comprises the steps of designating one of the nodes...
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5764624 |
Aim switching system and path changing method
An ATM switching system at each node of a network performs route changing or rerouting promptly when a failure occurs. In each of ATM switching systems at nodes N1 to N6: a route table 21 of a line...
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5751695 |
ATM cell flow control apparatus
An ATM cell flow control apparatus includes interface sections for terminating transmission lines of two systems which constitute a redundant structure and to which identical cell sequences are...
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5732085 |
Fixed length packet switching apparatus using multiplexers and demultiplexers
The present invention relates to a fixed length packet switching apparatus using multiplexers and demultiplexers in which the apparatus has an output buffer-type construction, protects itself from...
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5729528 |
Data transmission system having a monitoring function for monitoring the congestion of links and node intended to be used in such a system
According to the invention, a data transmission system is provided in which data streams corresponding to file transfer applications are separated from those that correspond to transaction traffic....
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5684958 |
System for preventing cell dropout on the transmitting side using timing signal and read completion signal to control the retransmission of previous cell
A cell dropout preventing system includes a memory for temporarily storing cells which are obtained by dividing transmitting data into cells having a fixed length, an address generating part for...
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5677912 |
Diagnostic device for a communications switching system
A diagnostic device for a port interface equipment (32) of a communications switching system (12), and at least one digital console (34) having a device (10) for selectively monitoring the...
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5671214 |
System for processing synchronization signals with phase synchronization in a mobile communication network
For synchronization signals of zeroth and first series, a synchronization signal processing system comprises synchronization trunk device of the zeroth and the first series (77(0), 77(1)) for...
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5671213 |
Duplicated arrangement for ATM switching system
In a duplicated arrangement for an ATM switching system, first and second store-and-forward buffers are provided for storing and forwarding an ATM cell stream and first and second counters are...
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5648963 |
Input and output side conversion interfaces for an ATM exchange
An ATM exchange which is comprised of a multistage cascade connection of ATM switches of self-routing module structures which are provided with a plurality of outgoing lines and incoming lines,...
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5627822 |
Method and circuit arrangement for disturbance-free redirection of a message cell stream onto an alternate route
Within a cell-oriented communication network, a switching equipment (CCa) located at the start of a path pair duplicates a message cell stream supplied thereto for redirection. The message cell...
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5592611 |
Stand-in computer server
An Integrity Server computer for economically providing a stand-in computer, replacing a failed server of a network. The invention provides methods for re-establishing connections between clients...
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5590118 |
Method for rerouting a data stream
A method is described for rerouting a data stream previously routed via a route through a switching network which has now failed. The method includes the steps of detecting the failure on a link...
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5555478 |
Fiber optic information transmission system
A unique fiber optic network with shunting routing devices strategically placed on the fiber optic matrix. These shunting devices divert the packeted information through the network to the intended...
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5553060 |
Method for maintaining virtual connections given an at least partial outage of connecting paths
A method for setting up virtual connections in packet switching networks is disclosed wherein a virtual connection within a second packet switching network is used to maintain or create a virtual...
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5553058 |
Centralized load minimizing method for periodical routing verification tests scheduling
There is disclosed a method for scheduling verification tests to audit routing information in a packet switching network comprising a plurality of packet switching nodes and a plurality of...
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5485465 |
Redundancy control for a broadcast data transmission system
Apparatus and method for a broadcast communications network for comparing the information received on both a primary and secondary communication link. The absence of a packet of information on the...
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5471460 |
ATM switching system with unit switch selecting function for avoiding faulty unit switch
A switching system with a switching network (10) of multistage construction applicable to ATM (Asynchronous Transfer Mode) is characterized in that each incoming line is wired in parallel to a...
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5461609 |
Packet data network switch having internal fault detection and correction
A data network switch for switching data between a plurality of data links is disclosed and includes a programmable controller which adapts the data switching in accordance with the state of the...
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5408463 |
Resynchronization of asynchronous transfer mode (ATM) switch fabric
In a duplicate active-standby memory unit arrangement, a resynchronization initiation determination is made on a cell-interval-by-cell-interval basis based on the equality of cell contents of...
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5398236 |
Asynchronous transfer mode link recovery mechanism
An inter-node communications link failure recovery system for ATM nodes in which connections are quickly switched from a faulty link to one or more existing links. Within a node, alternate...
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5390163 |
Data exchange capable of minimizing loss of a data block
In a data exchange for use in an asynchronous transfer mode communication system, the data exchange has first and second buffers. An input data block is selectively loaded with the first and the...
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5377180 |
Data switching device
Switching modules of a digital network switch have switching ports connected to external ports by a connections network. The modules are arranged in groups. Some of the connection ports of the...
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5347271 |
Network switching contorol method and system
A network switching control met:hod controls switching from an active route to a protection route when a failure has occurred in any of nodes of a communications network or any of transmission...
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5327552 |
Method and system for correcting routing errors due to packet deflections
A distributed and adaptive method and system are provided for correcting routing errors due to packet deflections in a dual-shuffle exchange network (DSN). The DSN includes a shuffle-exchange...
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5315581 |
Hit-less protection switching method and apparatus for ATM transmission lines
A hit-less protection switching method and apparatus therefor for ATM transmission lines for selecting first cells from normal received signals and writing the same into a normal cell buffer,...
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5307344 |
Method for setting up virtual connections in packet switching networks
Method for setting up virtual connections in packet switching networks. In response to a call request with which the set up a virtual connection is requested and that is supplied to an originating...
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5285441 |
Errorless line protection switching in asynchronous transer mode (ATM) communications systems
An errorless line protection apparatus involves receipt of data from an active line and a standby line. A determination is made as to whether the data from the active line leads or lags the data on...
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5241534 |
Rerouting and change-back systems for asynchronous transfer mode network
A change-back system is designed for an asynchronous transfer mode network in which a rerouting path is set to replace an original path when a fault is generated in the original path within the...
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5239537 |
Packet-switched network having alternate virtual paths
In a broadband ISDN system where each switching node is connected to each adjacent node by a transmission line having communication links and a service link, the switching node comprises a...
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5235599 |
Self-healing network with distributed failure restoration capabilities
In the event of a failure on a transmission line, a sender, or a terminal node of the failed line, broadcasts CONTROL packets to each of all adjacent tandem nodes, containing a hop count and node...
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5222062 |
Expandable communication system with automatic data concentrator detection
A communication system including one or more host adapters connected to a host computer, each adapter having multiple serial communication ports for transferring data between the computer and...
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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...
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