Abstract: A high speed modem is provided which targets the use of a selectable, desirable portion of the total available bandwidth of a channel for achieving a data rate which nevertheless far exceeds that of conventional voice-band modems. In a preferred embodiment, the invention is implemented in an Asymmetric Digital Subscriber Loop (ADSL), and the nominal data rate is achieved using an analog front end (AFE) with subband filtering which causes an upstream transceiver to use only a selected number of available sub-channels for downstream data transmission and allows slower sampling rate for the AFE. The data rate of the modem is increased in a multiplicative fashion through modular expansion of a bank of AFEs to increase the number of transmitted downstream sub-channels.

Abstract: A system and method for suppressing ring signal pulses on a telephone line, the system comprises: (a) determining means for determining a duration and a frequency of the ring signal pulses, and (b) attenuating means, responsive to the duration and the frequency of the ring signal pulses, for attenuating the ring signal pulses. Attenuating the ring pulses includes limiting the voltage difference between TIP and RING lines during the ring pulses to suppress the ring signal or a portion of the ring signal on each telephone connected to the same line.

Abstract: The invention provides a method of multiplexing moving pictures fed from a plurality of multimedia communication terminals through broadband Integrated Service Distance Network (B-ISDN) and displaying a multiplexed moving picture on a display unit of the plurality of terminals, which comprising the steps of checking a type and a performance of the terminals, and assistance possible performance of the MCU to the terminals by end-and-end signaling; and selecting M terminals among the plurality of terminals connected thereto; generating a start signal to the selected M terminals, the start signal allowing each of the selected terminals to generate the moving picture to be processed; processing a first and second moving pictures generated from two terminals in response to the start signal; processing a third and four moving pictures generated from two terminals in response to the start signal; repeating said steps until all of moving pictures from the selected M terminals are inputted.

Abstract: A coding system delivers a global data stream consisting of primary coded subband data streams from a primary subband coder bank, coding an input signal data stream, and secondary coded subband data streams from a secondary subband coder bank. The coding delay of the primary coder bank is smaller than that of the secondary coder bank. A filter bank receives the input signal data and generates signal streams in a plurality of subbands, which are coded by the respective coder of the primary subband coder bank, forming the primary streams. A bank of decoders receive and decode the respective coded primary subbank streams, which decoded subband signals are subtracted by a bank of subtractors from the corresponding original subband signals, which difference streams are input to the respective coder in a secondary subband coder bank. The secondary coder generates coded secondary subband data streams. A multiplexer interlaces the primary and the secondary coded subband data streams into a single global data stream.

Abstract: A method for the dynamic reconfiguration of a signal frame structure, wherein each frame is structured in at least one subchannel having a number, order and/or format capable of being altered under the control of a reallocation command, time interleaving on N frames being selectively performed for each subchannel. According to the method, in the transient state, and for the N frames following a reallocation command, the procedure for writing data elements according to the interleaving law remains unchanged, in accordance with the new structure defined by a reallocation command, and a specific logic for rereading the memory plane is implemented so that the frames consist of uniform capacity units comprising data elements from the same source signal. The corresponding transmitters, receivers and signals are also disclosed.

Abstract: A data processing system implements a load balancing methodology which recognizes the effects that multiple, mobile subscribers have within a wireless communications network. During execution of this load balancing methodology, a rehoming operation is executed at a telephone central office to move some subscribers in a network to a new home mobile switching center with a minimum number of rehoming steps. To perform this rehoming operation, a mobile switching center in a network which has a highest load is selected first. Mobile switching centers which have a load lower than a network average load are considered to be candidates for a rehome destination. All subscriber groups homed to the highest loaded mobile switching center are evaluated to determine whether or not a rehoming operation using this subscriber group would provide a highest benefit and give a lowest standard deviation of loads among mobile switching centers after the rehome operation is selected.

Abstract: Modems using a telephone line for high speed communications between them are arranged to monitor crosstalk from other existing communications systems with which they may mutually interfere, and adjust the power spectral densities (PSDs) of their transmitted signals to reduce overlap between the PSDs of the different systems, thereby reducing near end crosstalk. Communications can thereby be optimized for whatever crosstalk conditions may exist. The modems can have a master-slave relationship for communicating buffered frames in a half-duplex manner using a collision avoidance protocol for computer network access. Analysis of monitored crosstalk PSD information can be performed by each modem, by the master modem, or by a separate computer on the network. A digital signal processor used in each modem for receiving signals can be configured to be used at other times for the monitoring of crosstalk.

Abstract: A system and method for causal ordering in a distributed network with a minimum amount of delay. In a distributed network having three interconnected nodes, each having synchronized clocks, the second node sends a message to the first node. Before it sends the message, however, the second node attaches a time stamp t2 to the message. To determine when the first node can provide a causally ordered response, the method first determines a minimum message latency f from the third node to the second node. The method then adds the value of the time stamp t2 to the message latency f to calculate a minimum response time t1. On or after the time t1, the first node can provide the causally ordered response.

Abstract: An information processing system 700 tests the RF coverage reliability of a signal transmitted by a base station in a radiotelephone system cell. Information processing system 700 includes processing circuitry for receiving information characterizing the cell and outputing in response test information, the processing system operable to: estimate a radius of the cell; estimate a bin size for each of a plurality of bins partitioning the cell; estimate a minimum drive distance for validating RF coverage of the cell from the estimated radius and the estimated bin size; and select a number or road segments having a combined length exceeding the estimated minimum distance.

Abstract: A noise suppression circuit for a two-wire communications channel comprises a hybrid device, for example a hybrid transformer or circuit, for providing a differential mode signal corresponding to a differential signal received from the two-wire channel. A summing device extracts from the two-wires of the channel a common mode signal and supplies it to a noise estimation unit which derives from the common mode signal an estimate of a noise level in at least one frequency band having a bandwidth considerably narrower than an operating bandwidth for the channel. The noise estimation unit adjusts the amplitude of the noise estimate to correspond to the residual noise in the differential mode signal and subtracts it from the differential mode signal to produce a noise-suppressed output signal. A noise detection and control unit scans the operating band, identifies a frequency band having an instant highest noise level, and sets the noise estimation unit to the detected noisy band.

Abstract: A method for formatting CDRs to reduce storage and processing requirements within a switch or telecommunications network which formats CDRs in accordance with the disclosed techniques. A switch includes a call condense agent for collecting raw call information for calls handled thereby and a formatting agent for selecting, based upon an examination of said raw call information, an optimal data structure for formatting the raw call information and for producing a CDR by formatting said raw call information in accordance with said optimal data structure. The optimal data structure is that which best fits the raw call information.

Abstract: A bus architecture for use in a data communication system provides a communication path between processors and one or more external devices including (M+1) hierarchical processors. Each of the processors is categorized into one of N hierarchies with M and N being a positive integer larger than 1, respectively, and N is smaller than (M+1). The bus architecture includes a bus having N buses, each of the buses coupled to one or more processors of a hierarchy and (N-1) linking means, and each of the linking means for coupling a bus of a hierarchy to a bus of a next hierarchy.

Abstract: A memory card, capable of remotely exchanging information with a terminal by modulating a magnetic field generated by said terminal, includes a voltage limiter (LMT) with an input terminal (BE) for receiving, during the transmission of information between the terminal and the card, an amplitude modulated voltage (VNR) with a time-varying average voltage level (NM). A primary transistor (TZ1) is connected between the input terminal and ground. Diodes (D1. . . DN) are series connected between the input terminal (BE) and ground and between the input terminal (BE) and the gate of the primary transistor (TZ1), wherein the threshold voltages of the diodes and primary transistor define a limit value for the input voltage. A capacitor (C) is connected between the primary transistor gate and ground.

Abstract: A decision feedback filter device which has a forward filter (FF) and a feedback filter (FB) for the production, from input symbols (x(n)), of the corresponding decisions (d(n)), the forward filter (FF) receiving the input symbols at input, and the feedback filter (FB) receiving the decisions (d(n)) at input. The forward filter (FF) carries out a frequency domain filtering of blocks of M input symbols, and the feedback filter (FB) carries out a frequency domain filtering of blocks of L decisions, with L being lower than M. The feedback filter permits the intersymbol interference caused by the reception of echoes to be rectified.

Abstract: A state machine space for concurrent state machines is provided for use in a telecommunications system. Processing of the state machines (and their functions/actions) utilizes specialized data structures and processes to normalize and control data and events dynamically in the telecommunications system. A Universal Data Structure (UDS) provides data uniformity and represents an event in the telecommunications system. A typical UDS includes four fields which are defined by the UDS definition. Three of these fields include event, component types, and data, while an embedded fourth field includes enums. Each UDS represents an event occurring in the telecommunications system and activates one or more state machines contained within a sub-space.

Abstract: A method for configuring a spread spectrum cellular network for small-cell inclusion, by providing a finite series of PN-offsets, each PN-offset is separated by a constant value that is allotted to the spread spectrum cellular network. The finite series is portioned into a first and a second set. The second set subsequent to the first set and having sufficient PN-offset elements for a PN-offset reuse pattern having a plurality of cells, each cell having similar transmission characteristics. The second set is assigned to the PN-offset reuse pattern, deploying the cellular reuse pattern for a cellular network. Small cells are insertable into the spread spectrum cellular network by assigning the first set to a PN-offset reuse pattern having a plurality of small cells arranged in a small-cell reuse pattern, and deploying the small-cell reuse pattern.

Abstract: A connecting device for multicore fibers includes two superposed substrates each comprising a planar optic with multiple guides so that the guides of the two substrates are disposed in parallel planes that coincide with the cores of the fiber.

Abstract: A phase array antenna is monitored by applying to each element of the array in turn a signal known characteristics, detecting the signal output from the selected element as a result of the applied known signal, and comparing the detected signal with the applied signal whereby to monitor changes in the applied signal due to the signal path. The detection is preferably carried out using a single monitoring unit in the near-field of each antenna element. Alternatively the detection is carried out using a single source of applied signals a number of individual monitoring units one for each element of the array, and a switching device for selecting the element of the array to be monitored.

Abstract: A system and method for locating a specific component of a facility by using differential signaling. The system works in a facility such as a central office having many components, such as line cards. The central office includes several wireless transmitters for transmitting signals inside the office. Attached to each line card is a positioning device, which has a receiver for receiving the transmitted signals, a controller for converting the transmitted signals into location information, and a sender for transmitting the location information. The central office also includes a computer with a device for receiving the transmitted location information. As a result, the computer can provide to a user the location of the component inside the facility.