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7031319 |
ATM switching system
An ATM switching system 10 includes an EMA 20 and CPUs 30 and 40 as currently acting and subsidiary systems, respectively. The CPUs 30 and 40 are connected via connecting lines 50 a ...
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7023795 |
Method and apparatus for an active standby control system on a network
A method and apparatus for providing an active standby control system comprising the steps of providing a first programmable logic controller and a second programmable logic controller, each...
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7023794 |
Method and architecture for redundant SS7 deployment in a voice over IP environment
18A method and system for controlling the switching and control operation of at least one of an Softswitch system, an Signal Transfer Points (STP) and a gateway (GW) (e.g., in a SS7 signaling...
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7006431 |
Load sharing and redundancy scheme
Methods and apparatus for providing a device for forwarding packets in a network are disclosed. A first router and a second router having a shared set of interfaces are provided, enabling the first...
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7003581 |
System and method for improved load balancing and high availability in a data processing system having an IP host with a MARP layer
A data transmission system and method for transmitting packetized data from an Internet Protocol (IP) host, having at least an IP layer and a network layer, to a plurality of workstations by the...
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6999410 |
Apparatus for the transmission and/or reception of data, and method for controlling this apparatus
The invention relates to an apparatus for the transmission and the reception of data comprising:
a plurality of inputs and a plurality of corresponding outputs for the respective coupling to...
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6985435 |
Method for expanding the switching network of a communications system without interrupting operation
A method for extending the switching matrix of a communication system without interruption which is effected by reserving space for the routing addresses of the largest extension stage both in the...
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6985482 |
Cross-bar switch system with redundancy
A crossbar switch system with redundancy has N+1 cross-bar switches. A first cross-bar switch has first outputs of each of a plurality of nodes applied to N input terminals thereof, an (N+1)th...
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6980568 |
Method and apparatus for system clock synchronization
According to one embodiment, a method is disclosed. The method comprises receiving a first set of clock signals from a first clock unit at a second clock unit whenever the first clock unit is...
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6980554 |
Method and apparatus for connecting lines in line concentrator of switching system
A method of connecting a line concentrator to other line concentrators in a switching system, wherein a switching unit accommodates the line concentrator is provided. The method includes the steps...
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6970471 |
Communicating using IP addressing for redundant telephony modules
The present invention provides for efficient and reliable IP addressing in redundant telephony modules where an active one of the redundant modules must communicate using a common IP address. An...
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6963578 |
Router
A router comprising a priority level distinguishing means for distinguishing the priority level of a packet by referring to the information contained in the header of the packet, a routing table...
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6956816 |
Fault tolerant automatic protection switching for distributed routers
A working router is coupled to a SONET add-drop multiplexor (ADM) through a working line and a protection router is coupled to the ADM through a protection line. The routers are coupled to each...
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6952395 |
Optical network restoration
A method for protecting the flows of traffic against, and for restoring them from, a failure in a multifunctional, hybrid broadband access-and-transport network system includes the provisioning of...
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6950390 |
Mobile communication system and gateway selecting method thereof
The load of each gateway for connecting the mobile network and a predetermined communication network is distributed. In each gateway, data stored in a predetermined information server connected to...
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6950391 |
Configurable network router
A method is provided to allocate bandwidth from a first node to a second node in a optical network. The method begins by accepting a request from an end-user, who requests a virtual path between...
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6947376 |
Local information-based restoration arrangement
A network that is architectured to distributively be responsible for remedying failures achieves advantageous operation. This is accomplished by algorithmically and distributively assigning the...
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6928576 |
Backup gateway apparatus and home network system
A backup gateway apparatus is provided in a home network, connected parallel to a gateway apparatus. The backup gateway apparatus detects when the gateway apparatus is malfunctioning. During the...
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6922793 |
Method for recovering from malfunctions in an agent module of a modular network device
A method for recovering from malfunctions in a primary agent module of a modular network device. The primary agent module is installed in a modular network device having a number of network...
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6914878 |
Fault detection in multi-plane switch
A cell switch node ( 20 ) has a first switch plane ( 22 ); a second switch plane ( 24 ); a sender switch port interface unit ( 26 S ); and a receiver switch port interface unit ( 26 R ). The sender...
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6914879 |
Network element with redundant switching matrix
Network elements such as digital crossconnects are provided with a 1:1 redundancy of, among other things, the switching matrix in order to maintain their functionality in the event of a hardware...
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6912221 |
Method of providing network services
A method of providing network services is described. The network includes a number of nodes, each one of which is coupled to at least one other of the nodes by at least one of a number of optical...
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6912197 |
System and method for implementing redundancy for multilink point to point protocol
An efficient method and system for maintaining the data connectivity with the MLPPP peer in the event of failure of the processor running the Active MLPPP protocol engine, without requiring...
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6894970 |
Router switch fabric protection using forward error correction
Instead of alternatively utilizing only one fabric or the other fabric of a redundant pair, both fabrics simultaneously transmit duplicate information, such that each packet forwarding module (PFM)...
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6885635 |
High capacity router having redundant components
A router includes multiple routing engines. If the active routing engine fails, a backup one of the routing engines detects the failure and assumes the role of active routing engine. A redundancy...
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6882653 |
Gateway system having controller and signal processor for interconnecting IP network and telephone network and method for controlling alternative routing at the time of fault of gateway system
To detect network faults or congestion of traffic at an interface of a gateway system for connecting an IP network and a telephone network on the side of the IP network and to allow the IP network...
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6810010 |
Redundant LAN system, active line/stand-by line switching method, and recording medium
A redundant LAN system is characterized in that with a redundant LAN system which includes sub-LAN systems with redundancy incorporated by an active and a stand-by mode, a plurality of the sub-LAN...
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6798740 |
Method and apparatus for switch core health monitoring and redundancy
A method and apparatus selecting between primary switching fabric in an asynchronous transfer mode (ATM) network includes a Tap Mux controller that monitors the signals being transmitted to each of...
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6791939 |
Dynamic generation of deadlock-free routings
In accordance with methods and systems consistent with the present invention, an improved failure recovery system is provided that, upon detecting a failure, generates new routings for the network...
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6791940 |
Method and apparatus for data transmission control in a computer network environment
A data network may comprise routers for transmitting data between locations in the network via alternative routes. A network gateway or server may normally send data packets to a particular default...
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6778490 |
Method and apparatus for a fault tolerant router architecture
A method, apparatus and article of manufacture for routing a data packet in a fault tolerant manner. A data packet is received from an incoming data channel and is transferred to a switching engine...
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6775298 |
Data transfer mechanism for handheld devices over a wireless communication link
A method and apparatus for transferring data between a handheld device and a network over a wireless communications link. A datapool manager breaks files into virtual blocks and adds the virtual...
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6728535 |
Fail-over of forward link equipment
A communications system and method for transmitting data to a mobile platform is provided. The communications system comprises a forward link assignment manager in communication with a route server...
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6690644 |
Mechanism for 1:1, 1&plus 1, and UPSR path-switched protection switching
A mechanism for 1:1, 1+1, and UPSR path-switched protection switching, particularly for optical interface units in synchronous optical network (SONET) multiplexer equipment. A working unit and a...
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6687217 |
Method of and system for one plus one protection for radio equipment
A method of and apparatus incorporating 1+1 protection in a point-to-point radio system includes redundant microwave radio transceiver pairs, each transceiver including identical controls for...
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6671253 |
Method and system for providing peer redundancy to asynchronous transfer mode emulated local-area networks
A method and system for providing enhanced peer redundancy in an ATM emulated local area network (ELAN) served by a primary LAN emulation server (LES), a peer LAN emulation server, a broadcast and...
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6665263 |
VP protection system and VP protection method
The present invention provides a VP protection system and a VP protection method which forward messages quickly to nodes on an ATM network when an error occurs on the ATM network and reduce an...
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6661786 |
Service message system for a switching architecture
A service message system for a switching architecture including at least one Switch Fabric ( 10, 20 ) comprising a switch core ( 15, 25 ) located in a centralized building and a set of Switch Core...
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6658595 |
Method and system for asymmetrically maintaining system operability
A system is provided for asymmetrically maintaining system operability that includes a first processing element and a second processing element coupled to the first processing element by a...
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6639895 |
Fault tolerant network switch
A fault tolerant network switch includes two or more switches units and a highly reliable (i.e., one with no single point of failure) interconnect unit so that during normal operation both switches...
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6621515 |
System and method for routing video calls
A method and system for routing video calls includes one or more video endpoints. An array of infrastructure routing elements transmits the video calls between the video endpoints along one or more...
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6597656 |
Switch system comprising two switch fabrics
A switching system having at least two switch fabrics. Each fabric has a switch core and a set of SCAL (Switch Core Access Layer) receive and transmit elements. The switch cores are preferably...
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6597657 |
Unit and method for duplex call control for SVC connection
In a duplex call control unit for SVC connection, call control parameters with respect to SVC connection information with regard to SVC connection which has already been established and call...
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6594229 |
Data synchronization system for redundant packet routing architecture and method of operation
There is disclosed, for use in a packet switched network, a redundant switch comprising 1) a primary packet router for routing a first stream of data packets from an input interface to an output...
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6594231 |
Method and apparatus for configuration of stackable units in packet-based communications systems
A stackable network unit comprises a ‘down’ port and an ‘up’ port, an arbitration path for data packets from the down port to the up port, a repeat path for data packets from the up port to...
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6570844 |
System and method for providing redundancy in a telecommunications system
A redundancy system for a telecommunications system is provided. The redundancy system includes one or more resources, such as circuit cards containing circuits that process data for...
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6535479 |
Hitless switching system of ATM switch apparatus in which discard priority control is stopped
A hitless switching system in an asynchronous transfer mode (ATM) apparatus, includes a first system switch section and a second system switch section. The first system switch section has a first...
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6487169 |
Cell switch module with unit cell switching function
A cell switch module having a unit cell switching function and placeable in either an active state or a standby state. The module comprises a plurality of input ports for inputting cells thereto, a...
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6477141 |
Communication path quality monitoring method and quality monitoring apparatus
A start/stop setting section is provided on the upstream side of a dual-configuration ATM switch, and a start/stop detection section is provided on the downstream side for each of a working and a...
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6473396 |
Use of logical addresses to implement module redundancy
An apparatus is described to implement a module redundant system using logical addresses. The apparatus may comprise a bus on which a plurality of server modules may be coupled to. One of the...
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