Abstract: A system and method which tolerates both permanent processor failures and permanent software failures by scheduling a primary and a separate backup on different processors for every real-time process, while further increasing system robustness and reliability, by using primary and backup latest start times to allow primaries or backups to overrun, both before, and after, any permanent processor failure, by effectively utilizing any spare processor capacity including any additional processor capacity created at run-time due to primary or backup underruns, or due to not needing to execute a backup anymore, which significantly increases the chances that a primary or backup may meet its deadline despite permanent hardware failures and permanent software failures, and despite overrunning, while also satisfying additional complex constraints defined on the primaries and backups such as precedence and exclusion relations, in a fault tolerant real-time embedded system.

Abstract: Disclosed is an improved approach to access the contents of database file system. The contents of the database file system can be acquired and stored in a directory buffer. A parallel tree structure is used to retrieve directory contents quickly and in a consistent fashion.

Abstract: In general, embodiments relate to a method for managing a network device. The method includes detecting a change of at least one physical port on the network device; and in response to detecting the change, disabling the at least one physical port, wherein disabling the at least one physical port prevents the at least one physical port from being allocated to any logical port on a network processor in the network device.

Abstract: Certain exemplary aspects of the present disclosure are directed to a data-communications system including a networked contact center for which, in an example embodiment, a communication is received by a networked contact center. In determining whether to allow the communication to reach contact center resources, a contact rate value is examined. The contact rate value may represent an allowable quantity of contact within a time interval. For some example embodiments, a determination of whether the network contact center is to accept or reject the communication is made based on the contact rate value.

Abstract: Disclosed are some implementations of systems, apparatus, methods and computer program products for tracking inbound email messages in association with database records. A first electronic mail message received via a network from a first client device is processed, where the first electronic mail message has a header including a message identifier. The message identifier is obtained from the header and parsed such that an encrypted portion and one or more unencrypted portions are obtained, where a first unencrypted portion of the unencrypted portions includes an entity identifier associated with a first database record of a database. A secret key associated with the first electronic mail message is obtained and the first electronic mail message is authenticated using the secret key, the encrypted portion of the message identifier, and at least one unencrypted portion of the unencrypted portions of the message identifier.

Abstract: Technology is described for an electron gun driver including a half bridge driver circuit and a drive controller. The half bridge driver circuit includes a drive circuit configured to generate a grid drive voltage for a grid connection of an electron gun, and a cutoff circuit configured to generate a grid cutoff voltage for the grid connection of the electron gun, and a gate driver configured to switch between the grid drive voltage and the grid cutoff voltage. The drive controller is configured to generate a pulse input to the drive circuit and cutoff circuit and grid switching signals for the gate driver.

Abstract: A reverse power feeding (RPF) power supply unit (PSU) for remote network distribution point unit (DPU) that is reverse powered from multiple customer premise equipments (CPEs). A plurality of power converters, each having a different primary winding and sharing a common secondary winding of a transformer at the PSU, wherein only one of the power converters is operated at a time to provide a desired output voltage.

Abstract: Methods, apparatus, and processor-readable storage media for dynamically modifying call flow management using a common data model interface for automated call distribution systems are provided herein. An example computer-implemented method includes obtaining data from at least one automated call distribution system; processing at least a portion of the obtained data using at least one common data model pertaining to call flow management; configuring at least one relational database using at least a portion of the processed data; and performing at least one automated action related to call flow management associated with the at least one automated call distribution system using the at least one relational database and one or more user interfaces.

Abstract: A system on a chip (SOC) is configured to support multiple time domains within a time-sensitive networking (TSN) environment. TSN extends Ethernet networks to support a deterministic and high-availability communication on Layer 2 (data link layer of open system interconnect “OSI” model) for time coordinated capabilities such as industrial automation and control applications. Processors in a system may have an application time domain separate from the communication time domain. In addition, each type time domain may also have multiple potential time masters to drive synchronization for fault tolerance. The SoC supports multiple time domains driven by different time masters and graceful time master switching. Timing masters may be switched at run-time in case of a failure in the system. Software drives the SoC to establish communication paths through a sync router to facilitate communication between time providers and time consumers. Multiple time sources are supported.

Abstract: Various embodiments of the present technology provide systems and methods to pair each of a plurality power supply units (PSUs) of a server system with a corresponding one of a plurality of ATS modules. A failed ATS module or PSU can be detected and replaced without forcing a shutdown of the remaining pairs of PSUs and ATS modules of the server system. In some embodiments, a controller of the server system can monitor status of each of the plurality ATS modules and the plurality of PSUs. Based at least in part upon statuses of the plurality ATS modules and the plurality of PSUs, the controller may further determine an optimized output power of the PSUs and manage loading of the server system.

Abstract: A computer program product for command result verification is configured to receive a command and an expected result from a command line interface, execute the command, receive one or more result codes resulting from the execution of the command, determine whether the one or more result codes satisfy the expected result, and send a response to the command line interface in response to determining whether the one or more result codes satisfy the expected result.

Abstract: A method, apparatus and system for automatically generating an e911 alert are provided in a public safety answering point (PSAP) server including at least one messaging interface supporting message-based interaction with one or more user devices, wherein in response to a request for assistance message including location information associated with a user device, the PSAP server determines the emergency services resources proximate the requesting device and communicates location information associated with the requesting device toward the determined emergency services resources.

Abstract: There is provided with an image communication apparatus. A serial interface transfers data between a master and a slave. The master supplies a clock signal to the slave. An oscillation generator generates a clock signal. A switch selects, and supplies to the slave, either the clock signal output from the oscillation generator or the clock signal from the master. A controller stops an operation of the master and controls the switch such that the clock signal output from the oscillation generator is supplied to the slave, upon transition to a power saving mode.

Abstract: A method, system, and medium are provided for automatically determining a preferred queue size for an individual queue based on message traffic. The method includes referencing a plurality of queue data sets corresponding to messages associated with a queue within a collection time period. A queue data set associated with a largest number of messages in the queue is identified from within the plurality of queue data sets and, thereafter, a target-queue size is determined using queue data associated with the largest number of messages in the queue. In further aspects, the individual queue can be automatically tuned based on the target-queue size.

Abstract: The present invention relates to a method and apparatus for the communicating between remote devices using a low message rate wireless connection via monitoring, control and information systems. The network described in this invention is capable of supporting billions of such devices in an efficient and cost effective manner. The network uses a very low signaling rate and centrally controlled architecture in order to achieve this efficiency. The network can easily support numerous applications each controlling large numbers of devices. As the complexity of protocol used in the network is very much reduced in comparison to existing hierarchical mobile wireless networks, it is possible to produce devices that use very little energy allowing their use in many new and novel applications.

Abstract: A transmitter system includes a digital phase rotator, a phase rotation controller, and a digital radio-frequency (RF) transmitter. The digital phase rotator receives a first constellation data, and applies a digital phase rotation to the received first constellation data to generate a second constellation data. The phase rotation controller configures the digital phase rotation. The digital RF transmitter receives a digital input data derived from the second constellation data, and converts the digital input data into an analog RF output.

Abstract: A switching system that receives communications over a trunk incoming from a communications network and routes them to its subtending communications terminals responds to a stimulus, such as actuation of an actuator, by either (a) returning all of the communications that it receives on the incoming trunk at least subsequently to the stimulus to the network over a trunk outgoing to the network with instructions directing the network to redirect the returned communications to a second switching system for routing to communications terminals served by the second system, or (b) routing all of the communications that it receives on the incoming trunk at least subsequently to the stimulus to the second switching system over a trunk outgoing to the second switching system for routing to the communications terminals served by the second switching system.

Abstract: A method for administering a communication session includes initiating a session between a server and a user device, the user device associated with a user phone number, associating the user phone number and a first session state phone number with a state of the session, and sending a first message associated with the state of the session from the server to the user device, the first message sent from the first session state phone number to the user phone number.

Abstract: A method is provided for operating a directory assistance system having a plurality of different network elements operating on different protocols. The method includes receiving, at a first network element, operating on a first operating protocol, an incoming directory assistance call from a caller. A universal call identifier data is then assigned to the call. The call is then transmitted to a second network element, operating on a second operating protocol, wherein the same universal call identifier is accepted by the second network element. A record is generated of the exchange of the call between the first and second network elements based on the assigned universal call identifier data.

Abstract: Managing packet data network jitter is disclosed. A first call data associated with a mobile network communication session is received. A second call data that is older than the first call data is dropped from a buffer if required to make room in the buffer for the first call data.

Abstract: The present invention is a call routing system for use in directory assistance. The call routing system employs a primary call routing device configured to receive directory assistance calls from callers at a first directory assistance system, and determines, for each of the calls, whether they will be handled by the first directory assistance system, or by a second directory assistance system among a plurality of directory assistance systems. A secondary router is also provided, configured to route the calls within the first directory assistance system to the primary call routing device. The secondary router has a default call distribution logic, such that if the primary call routing device is off-line, the secondary call router routes the calls among the first directory assistance system and the plurality of directory assistance systems according to the default distribution logic.

Abstract: A system for (and a method of) selectively establishing communication with one of plural devices associated with a single telephone number during a disaster or disaster recovery period. In a preferred embodiment, the system includes two wireless connection units, each connected between a respective private branch exchange (PBX) network and a public switched telephone network. Each wireless connection unit preferably serves as a gateway between its respective PBX network and one or more remote communication devices. The wireless connection units replicate each others databases. In the event of a disaster that destroys or renders one of the wireless connect/PBX networks inoperable, telephone calls destined for the inoperable network are seamlessly routed to the operable wireless connect/PBX network. Since the operable wireless connection unit contains information for both networks, inbound, outbound and extension to extension calls for each network can be handled despite the disaster.

Abstract: Method and apparatus for ad hoc cooperative routing in an IP network. Included is an emergency stand alone (ESA) system that provides a bypass to a failed TDM switch for multiple communication devices in communication with one or more TDM switches. One or more internet protocol media gateways communicate a multicast signal upon the failure of a switch. The multicast initiates Voice over IP communication between endpoints, bypassing the failed switch.

Abstract: An improved approach to failover voice messaging services is provided. In one example, a method includes detecting a network communication interruption between a branch office and a main office, provisioning a mailbox of a failover voice messaging system of the branch office, and receiving an incoming call at the branch office. The method also includes routing the incoming call to the mailbox, storing a message associated with the incoming call in the mailbox, and detecting a restored network connection between the branch office and the main office. The method further includes synchronizing the message between the mailbox of the failover voice messaging system of the branch office and a corresponding mailbox of a voice messaging system of the main office in response to the restored network connection. Failover voice messaging systems supporting such features are also provided.

Abstract: Methods and systems for detecting IP route failure using a request-reply protocol, such as address resolution protocol (ARP), and for dynamically re-routing VoIP sessions in a VoIP device in response to failure of an IP route are disclosed. A plurality of IP routes are established between a first VoIP device and a second VoIP device. VoIP sessions are assigned to the IP routes. ARP is used to detect a failure of an IP route. In response to detecting a failure of at least one IP route, VoIP sessions are rerouted from the failed IP route to an alternate IP route.

Abstract: A method of providing router redundancy within a distributed network of routers, wherein messages are routed within the network based on virtual router identifiers, involves organizing the routers into one or more redundancy groups; assigning a physical identifier to each router in each of the redundancy groups; assigning one or more virtual identifiers to each redundancy group; selecting one of the routers of a particular redundancy group as a currently active router associated with a particular virtual identifier assigned to that redundancy group; advertising among the distributed network of routers for each redundancy group the physical identifier for the active router and information enabling other routers to determine the virtual identifier with which the currently active router is associated; and forwarding messages destined for a particular virtual router identifier to the currently active router based on the physical identifier of the currently active router.

Abstract: A method and system for secure Voice over Internet Protocol (IP) (VoIP) communications. The method and system provide secure VoIP voice calls, video, Instant Messaging (IM), Short Message Services (SMS), or Peer-to-Peer (P2P) communications while maintaining privacy over the Internet and other communications networks such as the pubic switched telephone network (PSTN) to and from any network device through a virtual private network infrastructure interconnecting private VoIP network devices. The method and system allow a network device to function as an IP private branch exchange (PBX) or a private VoIP gateway and provide and control VoIP voice communications without using other public or private VoIP gateways or VoIP servers or devices on a communications network such as the PSTN or the Internet.

Abstract: A method and system for optimizing a configuration of mediation devices in a telecommunications central office. Specifications associated with mediation devices are provided. A configuration of mediation devices and legacy devices in a central office is generated. A specification is compared to an attribute of a mediation device in the configuration. The attribute is one of: (1) a distance between the mediation device and a legacy device to be connected to the mediation device, (2) an amount of data to be received by the mediation device from one or more legacy devices to be connected to the mediation device, and (3) a count of one or more legacy devices to be connected to the mediation device. The configuration is updated in response to the comparing of the specification to the attribute. The updating of the configuration provides an optimized number of mediation devices.

Abstract: The present invention is a switching system interface providing conversion between time-division multiplexed digital signals and packetized digital signals used to bypass a common control and switch matrix of a class 5 digital switch. The switching system interface includes a network interface for terminating a digital transmission facility that is part of a network architecture. In addition, the interface includes a line/trunk interface, compatible with the internal signals used to operate the line/trunk interface of the class 5 digital switching system and a switch, connected to the network interface and to the line/trunk interface, for routing data between network interfaces and line/trunk interface. The interface also converts the data between time-division multiplexed digital signals and packetized digital signals.

Abstract: The flexible through-connection process, operational in a Mobile Switch Center, that provides support for allowing the call routing processor of the Mobile Switch Center to independently perform a through-connection/switch-connection based on different types of calls so that the Mobile Switch Center can make a through-connection at different stages of the outgoing call leg. In operation, the present flexible through-connection process includes in the call control processor of the switching system a new parameter in the existing inter-process message which is sent to the call routing processor at call setup time. The values supported for this new parameter will be pre-defined in the Mobile Switch Center and used by the call routing processor to determine when to perform through-connection/switch-connection for an outgoing call leg.

Abstract: A method for resetting a component of an off-card assembly in a redundant system, the redundant system having first and second control plane cards coupled to the off-card assembly by respective serial interfaces, each serial interface including a respective status line and a respective clock line, each status line for providing a respective activity indication and a respective reset instruction, each clock line for providing a respective clock signal, the method comprising: monitoring respective activity indications and clock signals from the first and second control plane cards by the off-card assembly to determine which of the first and second control plane cards is an active card; and, selecting the reset instruction from the active card to reset the component, thereby resolving any conflict between respective reset instructions.

Abstract: A redundancy management method of a switched full-duplex Ethernet communication network includes at least two independent elementary networks each of which includes at least one source equipment and at least one destination equipment. The method includes a step for defining a window included within a predetermined interval corresponding to the frames already received at a given instant, a step for comparing the number of the frame received with the window, and a step for accepting the received frame when the frame number is not included in the window.

Abstract: A method, and base station, are provided for logging on a portable part at a base station having activating capabilities for more than a single associated portable part, wherein the base station, before a log-on mode is actually switched on, performs a check for an operable connection from the base station to a telecommunication network and, if the check has a positive result, the log-on mode is kept switched off by the base station.

Abstract: The present invention is a system and method of combining an emergency standalone switching device with a switching system interface used to bypass the common control and switch matrix of a class 5 digital switch. The emergency standalone switching device provides call control of the switching system interface. The call control of the emergency standalone switching devices provides local and emergency calls to local subscribers.

Abstract: A unified messaging system is configured for encrypting messages. The calling party is prompted to encrypt the unified message, for example as part of an extended options menu. The unified messaging system encrypts the unified message based on an encryption key input by the user into an encrypted message, and generates an open-network destination header for identifying a destination location for the encrypted message according to an open-network protocol. The unified messaging system then outputs the open-network destination header and the encrypted message as an open-network encrypted message to an open-network message store. During retrieval of the message, the unified messaging system identifies the encrypted message and prompts the destination subscriber for a decryption key; the unified messaging system performs a decryption operation to recover a decrypted file, and outputs the decrypted file for playback to the user.

Abstract: A system for (and a method of) selectively establishing communication with one of plural devices associated with a single telephone number during a disaster or disaster recovery period. The method can offer disaster recovery to an enterprise depending upon its size, financial well-being and desired capabilities. For example, the enterprise has the option of owning or renting all of the equipment required so that it may perform disaster recovery on its own and with little outside intervention. The enterprise may own some or none of the necessary equipment and contract with a service bureau so that the bureau provides recovery equipment when needed. The system also provides for roll call, priority preemption and seamless switching services to and from circuit and packet communication devices.

Abstract: A system for (and a method of) selectively establishing communication with one of plural devices associated with a single telephone number during a disaster or disaster recovery period. In a preferred embodiment, the system includes two wireless connection units, each connected between a respective private branch exchange (PBX) network and a public switched telephone network. Each wireless connection unit preferably serves as a gateway between its respective PBX network and one or more remote communication devices. The wireless connection units replicate each others databases. In the event of a disaster that destroys or renders one of the wireless connect/PBX networks inoperable, telephone calls destined for the inoperable network are seamlessly routed to the operable wireless connect/PBX network. Since the operable wireless connection unit contains information for both networks, inbound, outbound and extension to extension calls for each network can be handled despite the disaster.

Abstract: According to the invention, systems and methods are provided for analyzing the diversity of a set of critical telecommunication circuits. For example, according to one embodiment of the invention, a method is provided for analyzing the diversity of critical telecommunication circuits, the method comprising: determining a critical circuit set comprising a first critical circuit and a second critical circuit; identifying a first set of telecommunication resources associated with the first critical circuit; identifying a second set of telecommunication resources associated with the second critical circuit; and comparing the first set of telecommunication resources with the second set of telecommunication resources to determine whether the critical circuit set is diverse.

Abstract: A scalable call processing node includes link interface modules capable of processing n calls per second and call server modules capable of processing m calls per second, n is variable relative to m by changing the relative numbers of call server and link interface modules. In addition, call server modules can perform subsecond switchover when a call server fails without requiring inter-call server transfer of call state information.

Abstract: A method includes receiving, at a softswitch executing on a computer, a plurality of calls for switching, monitoring at least one criteria associated with operation of the computer, and based on the monitoring, limiting the number of calls processed by the computer.

Abstract: An apparatus and technique configures an intermediate network node, such as an aggregation router, to implement automatic protection switching (APS) redundancy among its line cards in the event of a failure to one of those cards. The APS line card redundancy provides redundancy among a pair of line cards connected to a performance routing engine of the router. Internal APS data paths are implemented in the router through the provision of an alias logic circuit that selects packet data from one of an adjacent pair of line cards and sends identical copies of data to that adjacent pair of line cards.

Abstract: The present invention provides clear and robust arbitration of which of two system controllers is in control of a telecommunications switching system. Each system controller monitors and actively reports its status to a separate arbitration circuit. The resultant signal from the arbitration circuit tells the system which controller to obey. By feedback of its own output unnecessary switching or ill-defined control states are avoided. In particular, if either both or neither system controllers is reporting itself as OK, the system does not switch controllers. In addition, the arbitration circuit is fed redundant clock signals and support, making it effectively redundant.

Abstract: A method of and multi-processor based apparatus for dynamically reallocating processors to provide redundant functionality, the method including detecting a fault in a first function having a first priority, the first function supported by a first processor; selecting a second processor supporting a second function having a second priority; and reallocating, responsive to the fault, the second processor to support the first function when a predetermined relationship corresponding to the first priority and the second priority exists, this relationship including, for example, one or more of the first exceeding the second priority and the type and frequency of occurrence of the fault.

Abstract: An agent workstation in a computer-telephony system is controlled to provide a fault tolerance technique. A telephony device driver in the workstation is controlled by a server process in the workstation. A first client process interfaces a controller to the server process. The controller is also interfaced to the server process by a second client process, the second client process serving as an alternate interface between the controller and the server process in the event of failure by the first client process. Control of the server process by the controller is transferred from the first client process to the second client process in the event of failure by the first client process.

Abstract: Any one of a plurality of terminals sharing the same number determines whether or not to switch a transfer to any of the other terminals sharing the same number. If it determines that the transfer is to be switched, it authenticates one terminal among the other terminals sharing the same number, and then outputs a transfer switching request according to the authenticated terminal to a communication control station. The communication control station performs a transfer switching process concerning the authenticated terminal based on the transfer switching request outputted from the first terminal.

Abstract: IP-PBXs having different structure, for example, stand-by and active transmission lines are connected between unused pins of the interface block 24A and 24B to supply the relay driving signal from the switching block 20A to the switching block 20B according to a control signal from the control block 18, and change the transmission lines, and maintain a direct route.

Abstract: A high-capacity electronic switching system includes two or more first stage switch modules to each of which one or more subscriber terminals (telephone sets, fax machines, personal computers, etc.) are connected and each of which executes signal switching for signals from/to the subscriber terminals, and a second stage switch module for switching signals between the first stage switch modules. In the high-capacity electronic switching system, each of the first stage switch modules is connected to another one of the first stage switch modules via a special-purpose link for setting a communication link between the first stage switch modules when necessary. For example, the setting of the communication link via the special-purpose link is executed when an abnormal condition of the second stage switch module occurred and normal communication link setting between two first stage switch modules via the second stage switch module is impossible.

Abstract: Apparatus of facilitating circuit card replacement without down time, comprising a redundancy connector assembly having a first connector and a second connector, a redundant bus, and a first circuit card coupled to the first connector of the redundancy connector assembly. The first circuit card has a logic circuit and a switch operable to selectively couple and decouple the logic circuit to one of the first connector and the redundant bus. A second circuit card also has a logic circuit and a switch operable to selectively couple and decouple the logic circuit to the redundant bus. A bypass cable is used to couple the second connector of the redundancy connector assembly to the second circuit card during replacement of the first circuit card and routing signals destined for the first circuit card to the second circuit card.

Abstract: The present invention concerns an exchange control method, wherein an old host exchange accommodating a remote switch unit or subscribers is adapted to be accommodated in a new host exchange, and its object is to allow call processing control to be performed by the new host exchange while making effective use of the resources of the old host exchange including the remote switch unit. The new host exchange and the old host exchange are connected in an interoffice configuration by a signaling link, and each exchange includes an emulation processor; the old host exchange and the new host exchange perform message editing and exchange between the respective emulation processors, and exchange control is performed in such a manner that when there occurs data or a request for basic control that is normally processed at the old host exchange, the data or request is transferred to the new host exchange, and the new host exchange processes the data or request and sends a notification to the old host exchange.

Abstract: The present invention relates to a procedure for ensuring the operation of signalling channels in a V5 interface between a local exchange (LE) and an access node (AN). The interface includes at least two links (L), in conjunction with redefinition of the interface composition. Redefinition generally involves making changes in the V5 interface data, such as the location of signalling channels on the links. According to the invention, the operation of protected channels in conjunction with restarting is ensured by starting the protected channels on the channels defined for them in the new composition and on the channels to which they were transferred in conjunction with the protection switch-over.