Abstract: A broadcast methodology for activation of virtual circuits in a large scale data network at a controlled rate is disclosed. The method includes, at a node within the network, alternate steps of broadcasting activation signals for a predetermined number of the of virtual circuits and delaying a time interval. The alternate steps are repeated until all the activation signals have been broadcast.

Abstract: In an Intelligent Network (IN) a method for acquiring data is provided. The method comprises a test call initiated from the SSP to a desired destination within the network. The test call with the log portion appended to TCAP (and ISUP) messages travel through the network and collects data in the log portion from each node on the test call path. The test call with the traveling log (TLog) helps the maintenance personnel isolate troubles and faults in the network without having to monitor each node (or office) on the route of a troubled message path.

Abstract: This invention relates to a method and protocol to enable a simple, reliable and highly scaleable data transfer facility in a digital data network. In communication a server and a client within a data processing system, the method of transferring data from the server to the client comprises requesting, by the client, transfer of the data in accordance with a transfer unit size specified by the client The server transmits the data in successive blocks having a size based on the client specified transfer unit size, till all the data has been transferred, and the server delays at least a predetermined time period between transmission of successive blocks. This connectionless, unacknowledged data transfer protocol minimizes resource utilization at the data server and is combined with source rate control to reduce congestion in the intervening network.

Abstract: This invention relates to a method and protocol to enable a simple, reliable and highly scaleable data transfer facility in a digital data network. A connectionless, unacknowledged data transfer protocol minimizes resource utilization at a data server and is combined with source rate control to reduce congestion in the intervening network. The data transfer server implementing the protocol, operates by defining a circular ordering of individual scheduling timeslots having zero or more download records. The server selects in sequence, at a predetermined rate, the individual scheduling timeslots, and services, responsive to the selected timeslot having at least one download record, each record therein according to parameters in that record.

Abstract: In the Intelligent Networks environment, where multiple Service Providers and multi-Vendor equipment are involved in new service offering, the risk of overloading the network elements are real and managing the traffic is a challenge. Network traffic overloads could result from equipment failures, major equipment outages, or widespread loads above engineered levels. To solve the problem of network traffic overload, a Mediation Point (MP) is connected to a group of service control points (SCP). The MP includes control feature to balance the load and manage the overload controls for the multiple SCPs that are deployed in load sharing mode in the network.

Abstract: This invention relates to a visual indication system for a field replaceable unit. The system includes two or more visual indicators on a face of the field replaceable unit (FRU), each indicator having a unique shape and being switchable between an on state and an off state. Diagnostic and administrative control within the FRU functions to monitor overall operation of the FRU and, under the control of Network Operations Systems, selectively turns on or off the visual indicators to reflect status of the FRU.

Abstract: The invention manifests a secure, on-demand meet-me conferencing service embodied within a telephone network having an advanced intelligent network (AIN) infrastructure. Centralized control of conferencing bridges located in network switches is effected at a service control point (SCP) in the AIN telephone network. Routing and availability information with respect to the conferencing bridges is maintained by the SCP. When the SCP in communication with a network switch processing a call determines that the call is to initiate a conference, a bridge is allocated to the call. The availability information of the bridge is then updated and the SCP provides the network switch with routing instructions for connecting the call through the telephone network to the bridge.

Abstract: The invention manifests a secure, on-demand meet-me conferencing service embodied within a telephone network having an advanced intelligent network (AIN) infrastructure. Centralized control of conferencing bridges located in network switches is effected at a service control point (SCP) in the AIN telephone network. Users of the service first subscribe to it, and are assigned a primary authorization code, a code assignment directory number (DN) and a conference DN at that time. Before a conference, a subscriber calls the code assignment DN, provides the primary authorization code, and receives a secondary authorization code for distribution to persons who will be participants of the conference call. At the time of the conference, the subscriber dials the conference DN and provides the primary authorization code to the conferencing service to initiate the conference call. The participants then dial the conference DN and use the secondary authorization code to access the conference.

Abstract: A system for generating an exception report for a particular problem based on call traffic. The system maintains a count of occurrences for that problem, happening within a sliding window of call traffic volume. When the count exceeds a threshold value, the system generates the exception report whereby appropriate action may be initiated to correct the problem.

Abstract: DC--DC power converters are an integral and critical component of telecommunications products. As a key component, the reliability of these devices has direct impact on quality of the products. Many of the converters utilized in telecommunications products are standard "off the shelf" commercial units, available from a wide variety of suppliers. With the recent proliferation of the use of these devices, former qualification methods had proven incapable of assuring the quality and reliability requirements for a telecom environment. Disclosed is the current setup, test, statistical analysis and failure analysis methods used to assess DC--DC power converter design quality and reliability.

Abstract: A display system that encodes shading in an image to be displayed. The system comprises a video display having a plurality of pixel elements each being mapped to a respective bit within a memory, and a controller for energizing, at a predetermined frame refresh rate, the pixel elements according to an image bitmap stored in the memory. An energizing pattern of successive frames, which defines the shading by indicating for each frame whether the pixels of the display generally are to be on or off, is utilized by a processor to generate, at the refresh rate, an encoded bitmap by manipulating bits of a source bitmap as a function of the energizing pattern for each of the frames, and storing the encoded bitmap in the memory.

Abstract: A method and apparatus for bit synchronization and error detection uses bit rotation of a received data burst and division by a polynomial generator to produce a syndrome. Syndrome corrector logic steps and circuitry determine the bit slippage and correct the syndrome for the slippage to produce an error syndrome. If there are no errors, the bit slippage value is used to synchronize the received data burst.

Abstract: A processor shelf controller monitors processor shelf status. On shutdown or reset request either initiated by a central controller or the processor shelf, the processor shelf controller provides at least a first timer that allows the operating processor shelf sufficient time to shutdown operating system processes. For graceful shutdowns, a second timer is provided to allow the operating processor shelf to clear all application related processes prior to start of the first timer.

Abstract: A code-excited linear prediction (CELP) coding method and code divide the residual signal into frequency bands. Codebooks provided for each band decrease in size with increasing band frequency. Reduction in codebook size with increasing frequency together with reduction in sampling rate with decreasing frequency provide reductions in codebook search complexity that allow real time implementation on digital signal processor chips.

Abstract: A method of recognizing speech comprises searching a vocabulary of words for a match to an unknown utterance. Words in the vocabulary are represented by concatenated allophone models and the vocabulary is represented as a network. On a first pass of the search, a one-state duration constrained model is used to search the vocabulary network. The one-state model has as its transition probability the maximum observed transitional probability (model distance) of the unknown utterance for the corresponding allophone model. Words having top scores are chosen from the first pass search and, in a second pass of the search, rescored using a full Viterbi trellis with the complete allophone models and model distances. The rescores are sorted to provide a few top choices. Using a second set of speech parameters these few top choices are again rescored. Comparison of the scores using each set of speech parameters determines a recognition choice. Post processing is also possible to further enhance recognition accuracy.

Abstract: A speech bandwidth extension method and apparatus analyzes narrowband speech sampled at 8 kHz using LPC analysis to determine its spectral shape and inverse filtering to extract its excitation signal. The excitation signal is interpolated to a sampling rate of 16 kHz and analyzed for pitch control and power level. A white noise generated wideband signal is then filtered to provide a synthesized wideband excitation signal. The narrowband shape is determined and compared to templates in respective vector quantizer codebooks, to select respective highband shape and gain. The synthesized wideband excitation signal is then filtered to provide a highband signal which is, in turn, added to the narrowband signal, interpolated to the 16 kHz sample rate, to produce an artificial wideband signal. The apparatus may be implemented on a digital signal processor chip.