Abstract: A storage device includes an accelerator including a first processor, and a storage controller that uses a buffer memory as a working memory and includes a second processor different in type from the first processor. The second processor is configured to establish a first communication path between the first processor and the buffer memory responsive to a request of the first processor, and the first processor is configured to access the buffer memory through the first communication path.

Abstract: When receiving Dual Tone Multi-Frequency (DTMF) information, we provide a way to determine whether to store such, which may include sensitive user input information. More specifically, a media gateway (MG) obtains DTMF digit mask control information, which indicates whether DTMF digit information may include sensitive user input information not suitable for storage. Based thereon, it decides, whether to store the received DTMF digit information. In this way, the DTMF digit mask control information controls whether to store the user input information on the DTMF digit information processing device in the architecture with the service function being separated from the bearing function; thus, avoiding information security risks brought by indiscriminate storage of sensitive contents in the user input information.

Abstract: A system and method for processing a plurality of channels, for example audio channels, in parallel is provided. For example, a plurality of telephony channels are processed in order to detect and respond to call progress tones. The channels may be processed according to a common transform algorithm. Advantageously, a massively parallel architecture is employed, in which operations on many channels are synchronized, to achieve a high efficiency parallel processing environment. The parallel processor may be situated on a data bus, separate from a main general purpose processor, or integrated with the processor in a common board or integrated device. All, or a portion of a speech processing algorithm may also be performed in a massively parallel manner.

Abstract: A system and method for processing a plurality of channels, for example audio channels, in parallel is provided. For example, a plurality of telephony channels are processed in order to detect and respond to call progress tones. The channels may be processed according to a common transform algorithm. Advantageously, a massively parallel architecture is employed, in which operations on many channels are synchronized, to achieve a high efficiency parallel processing environment. The parallel processor may be situated on a data bus, separate from a main general purpose processor, or integrated with the processor in a common board or integrated device. All, or a portion of a speech processing algorithm may also be performed in a massively parallel manner.

Abstract: A reliability authorizing device determines whether to authorize a service transfer based on reliability of a partner device or a partner user when one user of one device authenticates other user of other device to exchange the service between devices connected to a network. A partner-reliability collecting unit collects reliability of the partner device or the partner user. A partner-reliability providing unit provides the reliability of the partner device or the partner user collected by the partner-reliability collecting unit.

Abstract: A method and apparatus for switching active calls from one entity to another on a network device. The method includes the steps of collecting the call information, designating a second, or target, entity to receive the call, and switching the call. If compression is being used in the call, the method will include the steps of copying the compression dictionary tables and loading the tables in the second entity. The apparatus includes a controller and at least two entities. A connector connects the entity with incoming or outgoing phone calls. The controller switches the active call from a first entity to a second entity.

Abstract: A method for decoding a DTMF tone which includes collecting the width of serial signals by measuring the time interval between zero-crossing points within a predetermined time; counting within the predetermined time the number of signal zero-crossing points; performing interpolation on the data produced by the collecting and counting steps with a Fourier transform; identifying a first frequency that has the strongest magnitude from the resulting data; and calculating the lower frequency of the tone being decoded by subtracting the first frequency from the average frequency of the digitized signal.

Abstract: At least one exemplary embodiment of the present invention includes a method comprising receiving a connection request at a modem integral to a programmable logic controller, and allowing access to the programmable logic controller via the modem. At least one exemplary embodiment of the present invention includes a method comprising establishing a connection between a calling device and a modem integral to a programmable logic controller, and allowing the calling device access to the programmable logic controller via the modem. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. This abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: A tone transmission part transmits a tone signal. A tone signal detection part detects data representing an echo signal of the tone signal transmitted by the tone transmission part, and detects data representing a predetermined tone signal targeted to be detected. The tone signal detection part also detects data representing tone signals of all of input signals. A tone judgment part excludes the data representing the echo signal from the data representing the tone signals of all of the input signals so as to judge a detection of the predetermined tone signal.

Abstract: Disclosed is an integrated tone detection processor for discriminating between tone and voice signals and determining the tones. The tone detection processor performs Automatic Gain Control (AGC) to normalize the power of the tone or voice signal. Further, the energy of the tone or voice signals are determined at specific frequencies utilizing a Goertzel Filter process. The tone detection processor determines whether or not a tone is present, and if a tone exists, determines the type of tone. Based upon determining the two maximum energy levels of the Goertzel filtered tone, whether the tone is a single tone, dual tone, silence, or other (e.g. speech) can be discriminated. The tone can then be identified by a user-defined dictionary of tones. Based upon various ON and OFF cadence checks in combination with the use of TONE ON and TONE OFF counters, tones can be declared.

Abstract: A signal detector includes a transform unit and a post processing test unit. The transform unit is adapted to a transform unit adapted to receive at least first and second frames of input samples, determine a first plurality of energy values for the first frame based on a first set of transform coefficients, and determine a second plurality of energy values for the second frame based on a second set of transform coefficients. The post processing test unit is adapted to identify at least one target frequency based on the first plurality of energy values. The second set of transform coefficients is based on the target frequency, and the post processing unit is adapted to determine the presence of a first signal in the input samples based on the second plurality of energy values. A method for detecting a signal is provided. A first frame of input samples is received. A first set of transform coefficients is determined based on a first plurality of frequencies.

Abstract: A system within a PC server cabinet for receiving an externally supplied loop feed voltage (−48 VDC) and generating a ringing voltage (75 VAC) from the loop feed voltage. For universal applicability, the ringing voltage generator is preferably located in a 5.25 inch standard disk-drive housing of the cabinet, allowing it to fit into any PC. All required telecommunications signaling and power is thereby provided in the PC while limiting accidental user exposure to hazardous ringing signal voltage levels.

Abstract: Detection of alerting or other tone signals in a composite signal are reliably detected with an improved false tone detect suppression technique which employs the use of a moving window analysis on a subset of frequencies detected within an underlying speech signal performed during each of a plurality of data frames. The composite signal is transformed during each data frame using a discrete Fourier transform comprising the so-called Goertzel Algorithm. All of the Goertzels relating to the tone detection are analyzed during each data frame, but only a subset of the Goertzels relating to the sweeping harmonic analysis of the underlying speech signal are analyzed during any particular data frame.

Abstract: A generic translator (10) is provided for processing service requests sent by a digit collection client (16). Requests include billing validation (11), call routing (19), call screening (17), account code validation (15) or other services. These requests are processed by the generic translator (10) and successful results are sent back to the digit collection client (16) or a trunk selection process (20). The generic translator (10) can access an external entity (18) to assist in digit translation (13).

Abstract: In a switching system data inheritance method of controlling hardware on the basis of a first database storing various management data such as subscriber information to inherit switching system data for various types of call connection processing, change information indicating a change in structure from the first database to a second database which inherits data from the first database is created. Data constituting the first database is converted into new data having a new structure and constituting the second database on the basis of the created change information to store the converted data in the second database. A switching system data inheritance system is also disclosed.

Abstract: A pair of communications adapters each include a number of digital signal processors and network interface circuits for the attachment of a multi-channel telephone line. A bus connecting the communications adapters can carry data between a network line attached to one of the adapters and the digital signal processors of the other adapter. The digital signal processors on each card are connected to a host, or controller, processor. Each digital signal processor interrupts its host processor by transmitting an interrupt control block as data to a data memory of the host processor, and by subsequently sending an interrupt causing the host processor to examine the data memory. Preferably, the interrupt control block includes data representing a number of requested interrupts.

Abstract: A telecommunications network architecture is known comprising a switching system for effecting basic call processing to set up, maintain and clear calls, and service-providing means (SPA) communicating with said switching system for providing services additional to said basic call processing. Due to the high availability requirements typically placed on telecommunications networks, the service providing means will generally need to be of a fault-tolerant design. A fault tolerant architecture is provided that relies on the checkpointing to a reliable store of state data for services currently being provided from first service logic of the service-providing means; should the first service logic fail, a second service logic is brought into operation and provided with required state data on current services from the backup store.

Abstract: A telecommunications switch (12) includes a dial plan database (300) used for creating, identifying, and verifying dial plan codes and dialing sequences of a desire dial plan (100). The dial plan (100) is created through a craft terminal (201) that communicates with a craft interface (200) of the telecommunications switch (12). The telecommunications switch (12) uses dial plans created and stored within the dial plan database (300) in performing a digit parsing routine. The digit parsing routine identifies dial plan codes and dialing sequences through digit collection by systematically eliminating possible dial plan codes until one is identified. The identified dial plan code is processed by performing valid or error actions associated with the identified dial plan code. The digit parsing routine continues with an incoming call until it has been appropriately handled and awaits for the next incoming call digits to be received.

Abstract: A multi-path digital signal processor for use in a telephony system provides a first data path for interfacing to a local area network, a second data path for interfacing to a Versa-bus Modular Eurocard (VME) bus, and at least one third data path for interfacing to at least one pulse code modulation digital signal path. The Digital Signal Processor may transmit and receive data by any or all of these means to allow efficient data transfer and processing by the Digital Signal Processor in a telephony system.

Abstract: An icon positioning device with a keypad, telephone circuit, speaker and microphone is used as part of an interface system to a computer and a telephone network. The icon positioning device is used to control a position of an icon on the computer's display. The keypad on the positioning device is used to enter information into the computer and to control communication over a telephone network. In addition, the computer displays icons that are representative of the keys composing the positioning device's keypad. When one of the keys is activated, the corresponding icon on the computer's display changes appearance. Thus, the positioning device serves as a multi-featured control apparatus, as a pointing device, and as a telephone.

Abstract: A multi-path digital signal processor for use in a telephony system provides a first data path for interfacing to a local area network, a second data path for interfacing to an industry standard computer backplane bus, and at least one third data path for interfacing to at least one time division multiplexed digital signal path. The Digital Signal Processor may transmit and receive data by any or all of these means to allow efficient data transfer and processing by the Digital Signal Processor in a telephony system.

Abstract: A user-programmable telephone switch which resides within a commercially available personal computer. The switch is controllable by either the personal computer's microprocessor or a separate, external host connected to an interface provided within the switch. The switch includes a CPU/matrix card that contains a time slot interchange and a CPU running under a real time operating system. The CPU/matrix card controls the overall operation of the switch in accordance with messages received from the operative host. In general, those tasks or functions which must be performed in real time are the responsibility of the switch, as opposed to the internal or external host. Within the switch, certain tasks or functions may be delegated by the CPU/matrix card to intelligent line cards which contain their own microprocessors having substantial call processing capability.

Abstract: A method for updating a system program in a switching equipment. Many known, program-controlled switching equipment have a system program deposited in read-only memories. For modifying the system program, a replacement of the read-only memories is necessary, as known. The method updates the system program without having to undertake interventions in the existing switching equipment. Proceeding from a data processing device, administration and maintenance orders are communicated to the administration and maintenance interface of the existing switching equipment, these administration and maintenance orders being misused for the purpose of transmitting an updated system program stored in the data processing device into the switching equipment and in order to reroute the program processing of the system processor located in the switching equipment onto the newly written system program.

Abstract: A method and apparatus for routing calls in a switched digital network and a processor for use in such a network are provided in which tables of call control information store information for different categories of call control information in separate parts of the table or in separate tables. The information in the tables is available for different network entities to share in routing calls. The separation of different categories of information simplifies the task of making changes to call control tables and can allow certain of the separate tables to be portable across the network.

Abstract: Disclosed is an apparatus and method for providing transmission between end users coupled to a digital loop carder access system. During normal operation, the access system functions to transmit data and supervisory signals between each end user and a local digital switch. In the event of a failure in the coupling between the access system and switch, the access system provides transmission paths between each end user and designated users such as emergency services which am coupled to the same access system.

Abstract: ISDN access to a telecommunications network is provided to customers at different locations by sharing a D-channel controllers (DCC's) positioned within the network in close proximity to the ISDN-capable toll switches serving those customers. The customers provide call set up parameters to a DCC via a user interface system (UIS) at the customers premises that communicates via a dial-up data connection with a respective user support system (USS) connected to the DCC. The DCC in turn formulates ISDN signaling messages that are sent to the switch via a PRI interface and set up an appropriate communications path through the network to a desired destination. Data originating in customer premises equipment is received in the switch via a T1 access line operating in the "non-facility associated signalling" mode.

Abstract: A system and method for creating and modifying intelligent telephone network call processing logic trees which can be customized for individual customers and created in a user-friendly visual environment (10, 15, FIG. 3-5). Service primitives are defined as logical graph nodes (20, FIG. 2, FIG. 3) which can be visually assembled into logic trees (FIG. 5) which represent the service logic flow and which provide default values for all service options. Higher level nodes, assembled from a plurality of service primitives, can likewise be defined and stored (12, 13, 19) for later use as entities in defining yet further call processing logic trees. These call processing logic trees are interpreted to allow the service control point computers (17) to implement the services in the switched telephone network (18) by sequentially executing the specified call processing primitives.

Abstract: The invention relates to upgrading existing telephone central offices having 1ESS or 1AESS switching equipment to utilize the SS7 protocol. In particular, the 1ESS and 1AESS switching equipment is provided with the capability of controlling the connection, management, and disconnection of telephone circuits using Signaling System Number 7 (SS7), a national and international standard set of protocols for providing such circuit control and providing and receiving information via the SS7 protocol for enabling enhanced service in the switching equipment.

Abstract: The invention relates to an intercom system comprising a central unit and several remote stations connected by two-way lines to the central unit into a star network, whereby the lines are selectively interconnectable via the central unit for establishing a connection between desired remote stations. The number of simultaneous connections can be increased and the speech signals can be more reliably passed to the right remote stations when the two signal directions of each line are separated from each other at the central unit and the connection is established by connecting each signal direction separately.

Abstract: A large number of potential alphanumeric patterns are ordered in a predetermined sequence which is then used to construct a transition graph composed of machine states along one coordinate and alphanumeric symbols along the other. The intersections on that graph establish either the next machine state on the graph or the action the system should provide. Pattern recognition is thus possible against strings of alphanumeric characters received thereafter by responding to the characters to determine a path of state transitions through the graph until an appropriate action indicator is reached. Machines including the invention are dynamically configurable and permit a variety of system management options to the user. The invention has particular utility for flexible configuring of the dialing plan and internal management of PBX type of telephone switching devices regardless of the pattern discipline associated with its external connections.

Abstract: A multi-protocol communications adapter (MPCA) is used to interconnect a Local Area Network (such as a store computing system) to a communications highway. The MPCA includes a plurality of protocol controllers, each one of the controllers being operable for converting a data stream into a predetermined format. A programmable configuration register is provided for selecting one of the protocol controllers. A controlled interface is provided for gating the selected controller onto the communications highway. The MPCA is packaged as a card or module. It is coupled to a primary computer that controls the Local Area Network. The primary computer may effectuate a protocol change by changing the contents of the configuration register. Thus, the MPCA can be used with a pre-existing primary computer without significantly changing the architecture and/or programming of said computer.

Abstract: A single board multiple option card for expanding the versatility of a host computer includes an onboard microprocessor, a digital signal processor and a switched memory device. The switched memory is accessible by the onboard microprocessor and the digital signal processor under the control of the onboard microprocessor. The card further includes an analog signal interface having a plurality of switches, the positions of which are controlled by the onboard microprocessor. As a result, multiple options are provided by varying the positions of the switches. Typically, such options may include: "Invisible Keyboard"; "Voice Command Over Telephone Lines"; "Voice Store and Forward Over the Telephone"; "Voice Record and Playback"; and "Hands-free Telephone".

Abstract: A circuit arrangement for telecommunication installations, in particular, telephone exchange installations is disclosed in which type information is sent ahead of each communication to be transmitted. In bidirectional communication transmission with different possible communication types, type information announcing the respective communication type is sent ahead. In the receiving equipment the beginning of the arrival of type information is recognized and immediately, that is, almost simultaneously, an assortment of type-specific message corresponding to each of the possible communication types is transmitted in the opposite direction, of which each indicates the readiness or non-readiness for receiving a communication of the respective type.

Abstract: A system for expanding the number of signal ports accommodated by a base communication system having one or more switching circuits for interconnecting a plurality of local signal ports via a multiple line signal bus under control of a central controller. The expansion system is comprised of a plurality of expansion port circuits connected in parallel to the signal bus, for selectively interconnecting one or more respective remote signal ports to predetermined lines of the signal bus under control of the central controller. Each of the expansion port circuits preferably includes a selector/multiplexer circuit for selectively interconnecting the remote signal port with the predetermined line of the signal bus. According to a preferred embodiment of the invention, the communication system is a telephone system, such as a key telephone system or PABX, and the multiple line signal bus is comprised of a set of junctors.

Abstract: An operation support system architecture for a telecommunication system contains a control arrangement (BWS) inserted between the system (S) to be operated and an opertor station (DSS). The control arrangmeent comprises, besides a processor and an input/output unit (EAB), a memory (RSP) which contains the operating and maintenance knowledge of the system (S), namely in the form of the CCITT Specification Language SDL/PR. Further the control arrangement (BWS) comprises a correlation memory (ZSP) in which are stored the definition for the formation of MML commands to the system (S) and the formal description of the reactions expected by the system (S). On the basis of the data in the two memories (RSP, ZSP), a translator (I), also present in the control arrangmeent (BWS), can send the correct and properly structured commands directly to the system (S) or respectively evaluate the reactions of the system (S).

Abstract: A telephone signalling receiver comprising speech detectors for respective voice-frequency signalling components of push-button (TDK) signals which are in a frequency band divided into lower and upper frequency subgroups. Each detector calculates the Discrete Fourier Transform (DFT) of the corresponding signal frequency component, the frequency characteristic of such detector having a main lobe for such signalling frequency component and two side lobes. Such calculation employs DFT product coefficients calculated for the lower and upper frequency subgroups and which are stored in memories, such coefficients being for particular Kaiser-Bessel window functions and for pairs of frequencies in the lower and higher subgroups. The coefficients are selected so that the peaks of the side lobes are lower, such as 6 dB below, the peaks of the associated main lobes.

Abstract: In a switched integrated wideband and narrowband multiservices digital network (FIG. 1), the network control complex (612) includes a program-controlled call processing arrangement (800) that comprises a point-to-point call processing portion (8001) for handling point-to-point calls and a proxy vendor call processing portion (8002) for handling calls to broadcast program service vendors. For quick response to "channel change" requests from subscribers, the proxy vendor portion handles all calls within a single process (500). For ease of call control, the point-to-point portion handles each call via two processes (650, 660) one for each of the calling and called portions of each call. A message router (8000) receives messages from subscriber terminal equipment (400) requesting control functions for calls and routes them to the appropriate one of the proxy vendor and point-to-point processes.

Abstract: An electronic step-by-step switching system utilizes much of the equipment now present in conventional electromechanical step-by-step telephone exchange switches. Conventional line finders, selectors and connectors are modified by removing the relay logic and replacing it with microprocessor based controllers. The modified line finders communicate through a bus with an originating controller and the modified connectors communicate through a bus to a terminating controller. The controllers are interconnected for data exchange through high speed buses that are supervised by a bus controller. A programmer station is installed for bi-directional communication through the bus controller. The originating and terminating controllers include memory storage for maintaining status information concerning the subscriber lines within the groups of corresponding line finders and connectors. The modified line finder works in conjunction with the originating controller to identify the line for an off-hook subscriber.

Abstract: A multiprocessor system consisting of a plurality of slave processors and a master processor each connected by a bus to a common memory. Message transfers are implemented by the master which scans one-byte areas in the common memory-each slave processor only being able to load a pointer to one said one-byte areas.Contention problems are prevented because once a remote processor has loaded information to its one byte area it must pass control of the bus to another processor. The system is fast because the master does not waste time looking at empty memory.

Abstract: An arrangement for achieving multi-processing is disclosed for use in a communication system where it is desired to have several independent processors operating in parallel on stimuli received from the connected terminals. Each such terminal is associated with a particular processor and that processor serves to control connections involving its associated stations. Stimuli from the station are stored in a queue and processed in an intermixed fashion such that stimuli from the connection are processed in order of arrival of the stimulus, but stimuli from different connections are processed without regard to the relative order of arrival of stimuli between connections.

Abstract: In a small PABX with a switching matrix that has electronic crosspoints, integrated selector components comprising multiplexers or demultiplexers in C-MOS technology are used for the switching matrix. By means of individual dialing connection points, which are determined by an appropriate control address supplied by a control computer unit, the individual subscriber lines are to be connected together in internal traffic, and the subscriber lines are to be connected with an exchange line in external traffic. The switching matrix is electrically separated from other operating units by repeating coils in the subscriber lines and in the exchange lines. Central units (tone receiver, tone generator) are connected through free dialing connection points of the multiplexers.

Abstract: An improved step-by-step switch assembly includes an electronic controller conversion module. A programmed microprocessor responds to incoming pulse trains of widely variant make and break ratios and generates precisely timed and shaped pulses to operate vertical, rotary and release magnets of the switch assembly. Other features include increased loop sensitivity, selective digit absorption and automatic periodic contact wiping to clean all of the contacts of the assembly.

Abstract: An adjustable incremental load simulator 200 acts upon a telephone control processor 300 to drive the processor toward and into an overload state. This is accomplished by reducing the number of processing cycles available for system task execution by execution control 360. The simulator 200 pulses an interrupt circuit 350, thereby halting the execution of system tasks for a fixed number of processing cycles. The adjustable incremental load simulator has an adjustment which controls the rate of generation of interrupt signals and thereby controls the rate at which system task execution cycles are made unavailable to the execution control. The performance of the system is monitored via a display 150; thus, the simulated incremental load can be adjusted while system performance is monitored.

Abstract: A controller for controlling a one-sided switching matrix comprising a plurality of circuit elements under the control of logic circuitry. The controller interprets a request for connection or disconnection, determines if it is possible, selects a path through the matrix and sends control signals to the matrix. The circuit elements are arranged in a parallel/pipeline architecture with multiple circuit elements simultaneously operating on a request. The controller can fetch a second request while executing a first request. The result of a request is to connect or disconnect interconnection paths on the switching matrix.

Abstract: A mechanized system distributing the access, test and communication functions to the point of testing, typically the centralized switching facility serving the telephone loops and equipment to be tested. Computer (200) stores information about each subscriber loop in the geographical area served by a system. Front-end computers (220,221) interact with computer (200) to retrieve pertinent data regarding loops to be tested. Each switching facility in an area includes a loop testing system (e.g., 160) that implements the required functions. The communication functions residing in front-end computers (220,221) and loop testing systems (160,161) are coupled via a data communication network (140) in a manner that allows any front-end computer to communicate with any loop testing system. Users of the system control access and test from consoles having the capability of establishing independent communication paths over the national dial network for interactive tests on loops accessed through standard test trunks.

Abstract: The invention provides a circuit and method for the time-sharing of a DTMF tone receiver. A DTMF receiver has its input terminal connected to a common output terminal of a pair of transmission gates, each gate having an input terminal connected to a respective source of DTMF signals. A control circuit provides switching signals to the transmission gates to cause their input terminals to be connected alternately to the input terminal of the receiver at a predetermined rate until the receiver detects a tone signal on at least one of the input terminals of the gates. The control circuit includes circuitry responsive to the initial tone detection for inhibiting the further generation of switching signals until the tone detection by the receiver has been completed.

Abstract: Programmable feature card circuitry includes: a signal processor with parallel input/output (I/O) data ports and responsive to command of the PBX call processor, signal memory, and a signal interface for converting the PBX signal format to a processor compatible format; the signal memory including program memory for storing signal processor program signals representing the programmed algorithm to be performed by the signal processor in the execution of the user selected PBX support function and including data memory for storing data signals from the PBX, the signal processor executing the stored programmed algorithm in response to the command signals from the PBX call processor.

Abstract: An interface circuit includes programmable registers both for making provisioning signals available to a set of electric circuit devices, and for monitoring operation of at least a portion of those devices. Signals received from a control source are employed to program the registers and to provision device control memories enabled for that purpose by one or more of the registers.