Abstract: Systems and methods for disaggregated management of a network fabric are presented. Network elements composing the network fabric can operate as a fabric manager with respect to one or more management functions while also continuing to operate as a communication conduit among hosts using the fabric. The roles or responsibilities of a fabric manager can migrate from one network element to another to preserve management coherency as well as to secure management of the network. Additionally, fabric managers communicate with the network fabric through one or more management channels.

Abstract: A managed surface-space network fabric is presented. The surface-space network fabric can include a spaced-based network fabric and a surface-based network fabric integrated together to form a single fabric managed by a global fabric manager. The global fabric manager cooperates with other fabric managers local to each fabric to establish a communication topology among all the nodes of the fabric. Preferred topologies include paths from any port on a node to any other port on another node in the fabric. The surface-space fabric, and each individual fabric, can function as a distributed core fabric operating as a single, coherent device.

Abstract: Methods of providing a secure communication over a network fabric are presented. A network fabric preferably comprises multiple interconnected network elements. Devices connect to the fabric through one or more ports and communicate with each other over the fabric by exchanging communications. A port-to-port session can be established within which multiple communication paths can be constructed. As devices communicate via the ports, the communication can be divided into data chunks and transmitted along different paths. Additionally, each chunk can be independently encrypted on one or more legs of its journey across the fabric.

Abstract: Systems and methods for disaggregated management of a network fabric are presented. Network elements composing the network fabric can operate as a fabric manager with respect to one or more management functions while also continuing to operate as a communication conduit among hosts using the fabric. The roles or responsibilities of a fabric manager can migrate from one network element to another to preserve management coherency as well as to secure management of the network. Additionally, fabric managers communicate with the network fabric through one or more management channels.

Abstract: A system for providing multi-channel multi-mode QAM equalization and carrier recovery is provided. According to one exemplary embodiment, the system includes an equalization circuit and a carrier recovery circuit operating in a concurrent manner to provide equalization and carrier recovery. The equalization circuit and the carrier recovery circuit each have two operating modes, namely, an acquisition mode and a tracking mode. The carrier recovery circuit evaluates a phase detection error calculated based on signals obtained from the equalization circuit. Based on the evaluation of the phase detection error, the equalization circuit and the carrier recovery circuit are respectively directed to switch operating mode, if appropriate.

Abstract: A device and method for canceling or attenuating harmonics noise without distorting the incoming signal. An exemplary device includes the use of an estimation loop to generate an artificial signal to eliminate or attenuate the influence of harmonics. The estimation loop includes a mixer adapted to produce a mixed signal by processing or combining the incoming signal and the artificial signal. The estimation loop includes an error detector, a low-pass filter, a parameter estimator, and a numerically controlled oscillator. The parameter estimator produces information relating to the phase, frequency, and amplitude of an incoming harmonics spur and will be used by the numerically controlled oscillator to generate the artificial signal. If the mixed signal contains relatively low levels of harmonics residuals, the mixed signal is produced at the output in lieu of the incoming signal.

Abstract: A digital automatic gain control circuit is disclosed. The circuit includes a selector, a scaler, a detector, a gain adjustor and a controller. In one exemplary aspect, the selector receives an input signal having two components, namely, the in-phase (I) and quadrature (Q) components, in digital form. The selector then selects a subset of bits from each component based on a control signal provided by the controller. The two subsets are then forwarded to the scaler. The scaler then multiplies the two subsets respectively against a gain value to generate two multiplication results. A portion of each multiplication result is then provided as output by the scaler. The gain value and the subset selection are periodically adjusted in response to the scaler output. The adjustments with respect to the gain value and the subset selection are effectuated collectively by the detector, the gain adjustor and the controller.

Abstract: A method and system for monitoring UDP communications and for preventing unauthorized UDP communications within a computer network. A method for managing access to a resource comprises assigning a unique user identifier to each authorized user, upon initiation of a UDP communication initialed by a specific authorized user for access to a specific resource, appending the unique user identifier of the specific authorized user to each UDP packet of the UDP communication, intercepting the plurality of UDP packets within the computer network, extracting the unique user identifier from each UDP packet to identify the specific authorized user associated with the respective UDP packet, and allowing each respective UDP packet to reach the specific resource as a function of the unique user identifier extracted from the respective UDP packet.

Abstract: Described is a rack-switch including a rack and a plurality of blade server chassis within the rack. Each blade server chassis has a plurality of server blades in communication with at least one switch. Each switch includes a plurality of external ports. At least two of the external ports of each switch are inter-switch link (ISL) ports. The rack-switch also includes a plurality of inter-switch links. Each inter-switch link electrically connects one ISL port of one of the switches to one ISL port of another of the switches. The plurality of inter-switch links interconnects the switches such that the switches are daisy chained in a loop. The inter-switch links convey Ethernet packets representing server-to-server communications between server blades of different blade server chassis.

Abstract: A system for providing jitter-free transmissions for demodulated data streams is disclosed. In one embodiment, the system includes a demodulator, a packet processor and a timing generator. The demodulator further includes a timing recovery circuit. Output signals from the timing recovery circuit and demodulated output signals from the demodulator are provided to the timing generator. Using these signals, the timing generator then generates an output timing signal. Demodulated data are provided to the packet processor as input. The demodulated data are then output by the packet processor under the control of the output timing signal from the timing generator.

Abstract: An improved system and method for network switching that provides the ability to automatically and seamlessly migrate policies for network hosts under certain conditions to local or remote switch ports. The improved switch automatically migrates switch policies for virtual and physical hosts from a source port to a destination port when hosts have been physically moved or replaced. For elements that have failed, the improved switch also migrates host network policies for both physical hosts and virtual machines when the old host network policy will maintain serviceability of the element when applied to the new port.

Abstract: A wire termination block includes at least one conductive contact; and a body having a base portion and a driving portion, the driving portion having a plurality of apertures for receiving wires and being operable in at least two driving modes to terminate and couple a received wire to the conductive contact. One of the two driving modes may be operable with a tool and the other of the two modes is operable without a tool by a user. For example, the driving portion may include a lever driven mechanism for terminating and coupling the received wires in a first of the two driving modes and a bolt driven mechanism for terminating and coupling the received wire in a second of the two driving modes. The conductive contact may be insulation displacement connector or contact (IDC).

Abstract: A method and circuitry for implementing digital multi-channel demodulation circuits. More particularly, embodiments of the present invention provide a digital multi-channel demodulator circuit. The demodulator includes a frequency-block down-converter that receives a multi-channel analog RF signal and shifts the multi-channel analog RF signal to a lower frequency band. An ADC receives the multi-channel analog RF signal from the frequency-block down-converter and converts the multi-channel analog RF signal to a multi-channel digital RF signal. A digital channel demultiplexer receives the multi-channel digital RF signal from the ADC and demultiplexes the multi-channel digital RF signal into separate digital RF channels.

Abstract: An improved multi-channel demodulator is provided. The improved demodulator includes an automatic gain control, a data buffer and a demodulation engine. Data from various RF channels are processed by the automatic gain control in order to keep the data at their respective constant levels. Output from the automatic gain control is passed to the data buffer for storage. Corresponding data from a selected channel is then processed by the demodulation engine. The improved demodulator is able to operate in any one of three operating modes, namely, a data processing mode, a channel switching mode and a waiting mode. In the data processing mode, the demodulation engine processes the channel data that is currently loaded into the demodulation engine. In the channel switching mode, the demodulation engine stores the current channel data into the data buffer and retrieves and loads channel data from another channel for processing.

Abstract: A method, system and program for preventing intrusion in a communications network. A source node initiates a request for network services, such as session establishment, database access, or application access. Known network resources and authorized user information is stored in a database at a network portal along with access policy rules that are device and user dependent. Identification of the source node is required before the source node can construct a transformed packet header that is included with a synchronization packet before transmission to a destination node. An appliance or firewall in the communications network receives and authenticates the synchronization packet before releasing the packet to its, intended destination. The authentication process includes verification of the access policy associated with the source node. Once received at the destination node, the transformed packet header is reformed by extracting a key index value.

Abstract: A wiring error detection circuit for providing the status of the wiring of an AC outlet and the status of the AC outlet's ground connection.

Abstract: A switch encapsulates incoming information using a header, and removes the header upon egress. The header is used by both distributed ingress nodes and within a distributed core to facilitate switching. The ingress and egress elements preferably support Ethernet or other protocol providing connectionless media with a stateful connection. Preferred switches include management protocols for discovering which elements are connected, for constructing appropriate connection tables, for designating a master element, and for resolving failures and off-line conditions among the switches. Secure data protocol (SDP), port to port (PTP) protocol, and active/active protection service (AAPS) are all preferably implemented. Systems and methods contemplated herein can advantageously use Strict Ring Topology (SRT), and conf configure the topology automatically. Components of a distributed switching fabric can be geographically separated by at least one kilometer, and in some cases by over 150 kilometers.

Abstract: The system of a content head end of a distribution system includes a program multiplexer, a multi-channel modulating module, a channel multiplexer, a digital-to-analog converter and a frequency block-up converter, all arranged in a sequential configuration. Packets representing respective content programs are fed to the program multiplexer. The program multiplexer multiplexes the packets into an output queue. Packets from the output queue are then fed to the multi-channel modulating module. The multi-channel modulating module receives the packets and routes them to various modulators representing corresponding RF channels. The various modulators then modulate the respective packets to generate corresponding RF signals. These RF signals are then multiplexed by the channel multiplexer into a multi-channel RF signal. The multi-channel RF signal is then forwarded to the digital-to-analog converter for conversion into an analog, multi-channel RF signal.

Abstract: A modular device for a telephone network interface apparatus having separate connection and plug-actuated testing compartments. The compartment for connection having at least one pair of contact wires for connection to a subscriber premises line and at least one pair of contact wires for connection to an incoming telephone company line, and an arm member mounted for insertion in the connecting compartment and into engagement with the subscriber and telephone company contact wires effecting the connection between the pair of subscriber contact wires and the pair of telephone company contact wires and for being withdrawn from the connecting compartment causing the subscriber contact wires to be disconnected from the telephone company contact wires to provide a point for demarcation therebetween.