Abstract: A time-division multiplexed (TDM) communication system has a dynamic bandwidth allocation (DBA) controller that is configured to reduce demand overestimation so that more optimal bandwidth allocation is achieved. Upon receiving load information from a transceiver, the DBA controller is configured to estimate an amount of change to the transceiver's reported load based on previous allocations of bandwidth to the transceiver for frames that occur during a reporting delay (e.g., the delay from the time that the load information is transmitted until it is received and processed). That is, the estimated load is reduced in an effort to account for transmissions made by the transceiver during the reporting delay, thereby preventing or reducing the amount of demand overestimation that would otherwise occur. Thus, the transceiver may be allocated less bandwidth according to a desired DBA algorithm so that more network bandwidth is available for other transceivers.

Abstract: It is suggested to detect a single wire interruption (SWI) of a line comprising two wires, wherein such line is part of a vectoring group, comprising (i) determining a capacitance between the single wires of the line; and (ii) determining whether a single wire interruption is present based on the determined capacitance.

Abstract: Methods and systems for resilient network communication are provided. In one aspect, a network includes multiple edge network elements, core network elements, and off-network network elements. Each network element has multiple ports. Communication paths exist between edge network elements, traversing core network elements. A maintenance domain maintains communication resiliency in the network through maintenance domain entities that detect network communication faults. Maintenance domain entities are associated with ports of edge network elements. VLAN service provision to subscribers occurs over the network by mapping services to VLAN tags such that the service VLAN includes information about the resilient network. VLAN service assignment to maintenance domains is balanced.

Abstract: A system installed in a cross-border area between a provider network of a provider and a customer network of a customer includes: a smart optical network termination device (NT) at a site of the customer, wherein the smart optical NT is configured to implement a demarcation point between the customer network and the provider network, and wherein the smart optical NT is independent of a data rate passing through it and an optical interface connected to it; and a monitoring device located at a point of presence (POP) of the provider network. The smart optical NT is further configured to monitor a coupling of optical power by the customer into the provider network and to interact with the monitoring device via at least one traffic analysis point (TAP) for connectivity validation from the POP to the demarcation point.

Abstract: There is provided a technique of securing clock synchronization between master clock node (MCN) and client clock node (CCN). During a cycle of exchanging PTP messages between MCN and CCN, MCN generates an associated paired message for each PTP message generated thereby and informative of t1 or t4 timestamps provided by MCN and sends each paired message to a validation entity (VE) via a secured channel between MCN and VE. When PTP messages traverse transparent clock nodes (TCN) between MCN and CCN, each TCN generates a paired message for each version of PTP message updated thereby and sends each generated paired message to VE via a secured channel between respective TCN and VE. VE uses the received paired messages to provide a validation of the cycle, wherein synchronization-related task(s) (e.g. clock correction by the client clock node, etc.) are provided only subject to successful validation of the cycle by VE.

Abstract: A memory system has a memory management unit (MMU) that is configured to receive data for storage into physical memory comprising a plurality of memory devices. The MMU receives a logical memory address and converts the logical memory address into at least one page address associated with data to be written to or read from physical memory. The MMU has an address translation circuit that is configured to translate each page address into a physical memory address. In translating the page address, the MMU employs an integer division operation that does not constrain the size of an arbitration map used to define the physical memory address. Thus, the operation of the memory can be better optimized using circuitry that has relatively low complexity and cost.

Abstract: A process for removing skew across a set of at least two clients that are members of a particular trunk, the skew removed from a data path from a first communications system component to a second communications system component. The process using a deskew marker to initiate storage of a set of idle primitives in a FIFO for client member of the particular trunk. Releasing in lockstep, idle primitives for the set of FIFO for the set of client members of the particular trunk after receipt of the final deskew marker. Continuing to route subsequent data for the set of clients for that particular trunk through the set of FIFO for the set of clients for that particular trunk. The data path from the first communications system component to the second communications system component may include traversing a fiber optic network.

Abstract: An optical detection device and method for detecting temperature changes and/or wavelength changes of an optical probe signal includes transmitting an optical probe signal having a predetermined wavelength to an optical input port of an optical waveguide; detecting first and second optical detection signal at first and second optical output ports via first and second opto-electrical converters which create corresponding first and second electrical signals; measuring values of the first and second electrical signal and determining an absolute temperature or a temperature change of the optical waveguide and/or an absolute wavelength value or a wavelength change of the optical probe signal via values measured of the first and second electrical signals and first and second previously determined wavelengths and temperature dependencies of both first and second power transfer functions.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for job management in a distributed network include a prioritizer that determines a priority level for a job and inserts the job into a priority queue based on the priority level, a scheduler that, for each element in the distributed network, requests the priorities of one or more jobs scheduled for execution, evaluates, based on the priorities of the one or more jobs scheduled for execution, the priority of a particular job with respect to the element, determines, based on the priorities, that the network element is free to perform job processes, and upon determining that a network element is free, scheduling a particular job for execution, and an executor that determines that all local and remote resources required for the scheduled job are available and executes the job according to processes defined within the distributed network.

Abstract: The invention relates to a method and apparatus of operating a bidirectional optical transmission link. The optical transmission link includes a first and a second optical transceiver at a dedicated end of the optical transmission link and an optical path connecting the first and second optical transceiver. The optical transceivers apply the methods of converting an electrical digital transmit signal into an electrical PAM-n transmit signal, pre-emphasizing the electrical PAM-n transmit signal) by digital filtering and using the pre-emphasized electrical PAM-n signal2) as modulating signal for optically modulating an optical carrier signal. The optical modulation method deployed is configured to create an optical PAM-n transmit signal with a positive or negative chirp.

Abstract: Methods and systems for context-aware distributed computing. In one aspect, a system includes a work administrator system; an API; a worker module; and a work administrator. One or more worker modules register with one or more work administrators. The worker modules may inform the work administrators of their processing capabilities and capacity. The work administration system receives a request for processing via the API. A work administrator parses a request into one or more discrete work requests and publishes each work request to the worker modules. The worker modules notify the work administrator whether they can perform the work, along with load and capabilities. The work administrator a worker module to perform each work request. When a worker module completes the work, it notifies the work administrator. The work administration system may aggregate the results from one or more worker modules and provide a response via the API.

Abstract: There is provided a technique of clock managing in a packet data network implementing a time-transfer protocol. The technique comprises: modifying, by the timing-server, a timestamp record to enable a controllable access to data informative of the least significant part of clock-informative data (CLSP data), wherein modifying the timestamp record comprises modifying the least significant part of the timestamp record (RLSP) to comprise the CLSP data in an encrypted form or to comprise values substituting, in a predefined manner, the CLSP data; transferring the modified timestamp record to all timing-clients, wherein CLSP data are transferred in a controllable access manner; enabling access to the CLSP data merely to authorized timing-clients among the plurality of timing-clients; and enabling the authorized timing-clients to obtain the CLSP data and synchronize the respective clocks using the CLSP data together with data informative of the most significant part of the clock-informative data.

Abstract: There is provided a method of clock recovery and a system thereof. The method comprises: by master clock node or by client clock node, generating a first flow of time-stamped packets bearing indication of high priority of delivery and, in parallel, generating a second flow of time-stamped packets bearing indication of lower priority of delivery. By client clock node, processing the packets from the first flow separately from the packets from the second flow to define, separately for each flow, a function informative of changes of packets' delays in the respective flow over time; using the defined functions informative of changes of packets' delays in the first and the second flows over the same time intervals to assess a cause of the packets' delays changes; and applying a clock recovery algorithm in a manner differentiated in accordance with the assessed cause.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for visualizing network data. In some implementations, a server receives a query for network traffic playback data of network devices. The server extracts data from the query. The server obtains historical network traffic data. The server generates the network playback data by: (i) obtaining a plurality of historical network traffic elements from the historical network traffic data associated with a network device, (ii) obtaining state transitional data for each historical network traffic element of the plurality of historical network traffic elements, (iii) determining whether the state transitional data for each historical network traffic element comprises the prior state, and (iv) in response to determining the state transitional data comprises the prior state, the server appends the state transitional data to the network playback data. The server filters and provides the network playback data.

Abstract: A light pipe device may have a substantially U-shaped base with first and second leg portions. One or more light pipes may extend from one or both of the leg portions. The light pipe device may be mounted to a printed circuit board (PCB) by clipping the U-shaped based onto an edge of the PCB.

Abstract: A system for monitoring voice services has a service monitor that is configured to periodically assess the registration state of a voice service provided to a customer. If the service transitions to an unregistered state, the service monitor logs the state change and continues to monitor the service to determine approximately when the service transitions back to a registered state. Thus, over time, the service monitor tracks loss-of-registration (LOR) events and analyzes the history of such LOR events to determine when they are indicative of a network or service problem that warrants further analysis or attention by a user. Using these techniques, the service monitor may be able to detect and, in some cases, diagnose problems that are degrading voices services for one or more customers even before such customers realize that their services are degraded.

Abstract: An apparatus (1) comprising hardware equipment (3) having hardware components (10) enclosed by a chassis (2) having a front side (2A) and a rear side (2B), and auxiliary equipment (5) movable within the chassis (2) along at least one transportation rail (7) with a non-linear trajectory extending in horizontal plane between a first position at the front side (2A) of the chassis (2) and a second position behind the hardware equipment (3) at the rear side (2B) of the chassis (2), wherein a part of the hardware components (10) is at least temporarily removable from the chassis (2) or movable within the chassis (2) to provide space (11) for moving the auxiliary equipment (5) within the chassis (2) along the at least one transportation rail (7) between the first and second position.

Abstract: An optical detection device and method for detecting temperature changes and/or wavelength changes of an optical probe signal includes transmitting an optical probe signal having a predetermined wavelength to an optical input port of an optical waveguide; detecting first and second optical detection signal at first and second optical output ports via first and second opto-electrical converters which create corresponding first and second electrical signals; measuring values of the first and second electrical signal and determining an absolute temperature or a temperature change of the optical waveguide and/or an absolute wavelength value or a wavelength change of the optical probe signal via values measured of the first and second electrical signals and first and second previously determined wavelengths and temperature dependencies of both first and second power transfer functions.

Abstract: An outdoor device of a timing system includes a receiver for receiving clock information from a satellite system, a processing system for running master functionality of a clock synchronization protocol to transfer the clock information to an indoor device of the timing system, and a transceiver for transferring data between the outdoor device and the indoor device. A memory device stores a fixed delay value estimating a time delay from a reception moment of a request message related to the clock synchronization protocol to a transmission moment of a reply message. There is no need to compute a difference between clock times corresponding to the reception moment and the transmission moment because the fixed delay value is used in lieu of the difference in the clock synchronization protocol. Thus, quality requirements related to an oscillator of the outdoor device can be mitigated.

Abstract: A configurable connector is provided for a communication device, such as a gateway, that is located outdoors. The connector can engage with a corresponding interface of the gateway to provide communication signals and power signals to the communication device. The connector can be configured to select the power type provided to the communication device via the connector. The connector can have a first configuration to provide a first power type to the communication device or a second configuration to provide a second power type to the communication device. In the first configuration of the connector, power terminals of the connector can be connected directly to corresponding power wires providing the first power type. In the second configuration, the power terminals of the connector can be connected by jumpers to supplemental terminals in the connector that receive the second power type from the communication device.