Abstract: The range of digital data communication services, such as a basic rate 2B1Q ISDN channel, to customer premises located beyond the industry standard achievable range of a two-wire loop can be extended by increasing the capacity of the ISDN line code from two information bits per symbol to three information bits per symbol, so as to reduce the effective symbol rate, which is error correction encoded to an effective 4B1H line code for defining a sixteen level PAM signal waveform, and employing enhanced low signal-to-noise ratio signal processing techniques in both the transmitter and receiver to accommodate the increased insertion loss of the two-wire line resulting from its extended length. Such enhanced low signal-to-noise ratio signal processing techniques include a Tomlinson precoder in the transmitter, and an adaptive linear equalizer and a module unit in the receiver.

Abstract: A linearized voltage controlled amplifier (VCA) circuit uses the resistance of a gain control MOSFET to control amplifier gain in accordance with a DC gain control voltage. A gain control voltage is applied to the gain control MOSFET's gate through a gate input resistor that forms a voltage divider with a feedback resistor from the output of the amplifier. Since the VCA's output terminal is a low impedance node, the voltage divider network applies most of the gain control voltage to the gate of the gain control MOSFET. Conversely, a small fraction of the amplifier output signal is coupled to the gain control MOSFET's gate, to reduce distortion. The linearized VCA circuit is augmented by a gate drive correction circuit, through which the gain control voltage is coupled to the VCA's gain control MOSFET. The gate drive correction circuit is comprised of a difference amplifier and a compensating MOSFET that is matched with the gain control MOSFET of the VCA circuit for controlling its gate drive voltage.

Abstract: State of the art data compression-protocol engines provide high compression ratios for improving data transport over a high data rate serial communication link. However, a respective data port of data terminal equipment may not be capable of being clocked at a sufficiently high clock rate, which limits the performance of the data compression-protocol engine, and prevents full utilization of the available bandwidth of the serial link. To remedy this problem, data terminal equipment and data compression-protocol engine components that provide auxiliary data communication port connectivity are employed. Data from the data terminal equipment is clocked to the data compression-protocol engine over a plurality of parallel data paths. This increases the effective clock rate and enables the data compression-protocol engine to output a compressed data stream that fully utilizes the bandwidth of the network.

Abstract: An ultra-wideband signal processor, such as that employed for processing narrow time domain radar return pulses, includes a coherent acousto-optic Bragg cell channelizer having a plurality of IF outputs from which a plurality of IF output signals respectively representative of energy content of respectively different frequency portions of the RF input signal are derived. A summing circuit is coupled to sum the IF output signals to produce a summation signal representative of their average energy content. This average energy signal is compared with a threshold to determine if the input signal is a valid RF signal. A delay circuit delays a selected one of the IF output channels by a time sufficient to accommodate summation of the channelizer outputs and determining whether a valid RF signal is present. A digital signal processor processes the delayed selected output signal in response to the summation signal exceeding the threshold.

Abstract: A folded acoustic traveling wave lens arrangement imparts multiple passes of an incident optical beam through the traveling wave lens, and thereby effectively maximize utilization of acoustic power. A lens of optically transmissive bulk material, such as quartz, is disposed in the path of an incident light beam which is spatially scanned by a light beam deflector. The bulk material of the lens element has a reflective layer disposed upon at least one of its surfaces, and is configured such that an incident light beam undergoes multiple passes through the acoustic wavefront propagating through the lens, prior to emerging from the lens. Aberration in the emerging beam due to multiple passes through the bulk material is corrected by a pupil plane correction plate.

Abstract: A method of operating an agent is comprised of receiving a message (goal) from another agent and performing a sequence of actions required by the goal, each action of the sequence of actions containing at least one instruction, each instruction containing an index number (PC), an action pointing to another action in a thread of actions, informing a subsequent action of a previous instruction including designating the PC of the previous instruction whereby a subsequent action is informed of an instructing PC, and returning an action completion acknowledgment message to a preceding action containing an instruction designated by the instructing PC, whereby the action containing the instructing PC can point to various different PCs to carry out different actions upon receipt of various acknowledgment messages.

Abstract: A multi-ported, caller ID-based test unit, which may be installed in the central office of a public switched telephone network, is capable of determining the telephone number, subscriber name and various other information associated with the subscriber line used to access to the test device, and is operative to conduct various tests of a telephone circuit from which a call to the test device is placed. These tests include exercising a caller identification, call waiting class of service, testing the ability of the telephone circuit to receive incoming calls, and testing the operation of a message-waiting indicator of a telephone unit coupled to the telephone circuit, as well as the ability to conduct a data session with a remote terminal using the test unit's data port.

Abstract: A pistol-configured, electrically operated impact tool for seating and cutting a wire includes a D.C. motor whose output shaft has transversely extending, cam surface-engaging elements that engage a cam-configured impact element. As the output shaft is rotated by the operation of the D.C. motor, the cam surface-engaging elements are rotated to an angle where they begin to engage cam portions of the impact element. As a result of this engagement, the impact element is linearly translated away from the cutting tool holder and toward the electric motor. During this linear translation of the impact element away from the cutting tool holder, a bias spring is compressed, so as to increase the force stored in the spring. Eventually, the output shaft will be rotated to an angle brings the cam surface-engaging elements into alignment with a prescribed feature of the cam portions of the impact element.

Abstract: A bandwidth-adaptive digital phase locked loop-based clock control arrangement controls the generation of a read-out clock used for retiming digital data signal interfaced with a synchronous data channel of a communication system, in which pulse-stuffing synchronization is employed to maintain clock synchronization of the digital data signal that is not bit-synchronous with a synchronous digital data channel over which the digital data signal is transported. The bandwidth-adaptive digital phase locked loop includes a loop filter to which the error signal is applied and a phase accumulator, coupled to the output of the loop filter and being operative to stepwise adjust the read-out clock signal. The loop filter has a first scaled path that includes a first, controllably stepped gain stage, and a second scaled path that includes a second, controllably stepped gain stage coupled to a frequency accumulator.

Abstract: An RF power amplifier distortion measurement system measures amplitude and phase distortion of a microwave/RF power amplifier by phase quadrature down-conversion of each of an RF amplifier's input signal and amplified output signals to baseband in-phase (I) and quadrature (Q) components, and performing RF amplifier distortion measurements on these down-converted baseband I and Q signals. The derived error measurement signal is remodulated to RF by phase quadrature up-conversion circuitry to produce an up-converted RF signal that corresponds to the RF distortion component contained in the RF output signal produced by the RF power amplifier.

Abstract: A network resource security services control system comprises an integrated arrangement of security services, that are operative to control the ability of an information storage and retrieval network user to have access to and communicate with one or more information resources within the network. The security access control mechanism monitors activity associated with a user's attempt to and actual conducting of data communications with respect to a system resource, and controllably modifies one or more security relationships of a security association that has been established among the users and resources of the system, in dependence upon one or more characteristics of the monitored activity, in such a manner that affects the ability of the system user to conduct data communications with respect to a system resource.

Abstract: An image signal transform mechanism employs one or more composite transforms that convert image bearing-signals corresponding to unrendered input images into output device-associated colorimetry values. Through a first sequence of transformations, the image bearing signals are related to database color encoding values. The database color encoding values incorporate corresponding colorimetric values required to match, in an encoding viewing environment, the appearance of the images in the input viewing environment. Through a second transformation sequence the database color encoding values are transformed into modified colorimetry values in terms of a viewing environment. Through a third transformation sequence, the modified colorimetry values are related to the output device-associated colorimetry values. The at least one composite transform (e.g., a single transform) is representative of plural transformations (all or some) within the first, second and third transformations sequences.

Abstract: A proportional solenoid-driven valve control assembly contains a moveable, magnetic armature positioned adjacent to one end of a fixed pole piece that protrudes from a solenoid bore and is supported by means of a compact suspension spring arrangement adjacent to the one end of the bore. The movable armature is configured to provide two radial magnetic flux paths. One flux path traverses a fixed radial shunt gap at one end of fixed magnetic pole piece that is located in and protrudes from the one end of the solenoid bore. The other flux path traverses a variable geometry reluctance gap defined between a radially projecting, tapered rim portion of the armature and an inwardly projecting tapered portion of the solenoid assembly housing.

Abstract: A blank, or dummy, face plate element engages top and bottom edges of a cabinet frame, directly behind a front panel card insertion opening that provides access to multiple card slots of an electronic equipment rack. The dummy face plate includes a rearwardly projecting, upper lip, that is located adjacent to a top edge of the face plate, and has a notch immediately adjacent to the rear surface of the face plate. The notch fits within and is captured by an upper edge of the cabinet frame. A rearwardly projecting, generally U-shaped, flexible lower lip is provided adjacent to a lower edge of the face plate and includes a pair of finger grips. The flexible lower lip has a ridge that becomes aligned with the lower edge of the faceplate when the lower lip is flexed upwardly toward the first lip, and a notch adjacent to the ridge that is captured by the cabinet frame.

Abstract: A reduced mask set, implant complexity process for manufacturing a (high frequency application) complementary bipolar transistor structure uses the fast lateral diffusion characteristic of a layer of material, that is at least an order of magnitude higher for emitter dopants than in single crystal semiconductor material. Separate base and emitter poly layers are formed undoped. Then, the emitter poly of one device and the edges of the base poly of the other device are exposed through a dopant mask and simultaneously doped. The emitter dopant goes directly into the surface of the emitter poly where it lies over and is in contact with the base. The base contact dopant goes into the edges of the base poly, including the layer of material having the high diffusion coefficient, rapidly diffuses laterally throughout that layer, and then diffuses down into the collector material (e.g. island) surface, to form the extrinsic base.

Abstract: A ground fault detection and line power supply control system protects telecommunication service personnel working on line-powered telephone circuits from ground faults, without requiring that the line power supply be disconnected or shut down prior to a technician working on the line. A ground fault loop sensing current is sourced from an auxiliary DC voltage source that is separate and distinct from the line power supply. This auxiliary DC voltage source is coupled through a ground fault current sense resistor to one side of the powered line, so that detection of a ground fault condition is not dependent upon the supply of current from the potentially hazardous line supply.

Abstract: An overhead bit-usurping multiplexing/demultiplexing mechanism increases the overall effective ISDN channel-conveying capacity of a serial digital data communication link, and thereby enables a terminal site channel bank to provide ISDN service to an additional number of customer premises equipments, other than the eight DSL channels normally accommodated within the twenty-four time slots of a (T1) TDM frame. Each condensed TDM DSL channel contains first and second multibit B information signal time slots, a multibit D information signal time slot, and a maintenance bit. No other auxiliary bits of a standard TR-NWT-000397 mode D+ octet are included, so that the compressed content TDM DSL channels have a smaller number of bits per channel than the standard TR-NWT-000397 format. As a result, when controllably interleaved with one another, the total number of TDM DSL channels (e.g.

Abstract: Unwanted acoustic noise and environmental degradation associated with the use of a highly sensitive microphone in a telephone test set are eliminated by a microphone-integrated keypad laminate architecture, in which a microphone is snugly captured within a microphone holder molded into a pliable keypad unit and its leads sealed against the environment and case vibration. The keypad unit is supported by a keypad support structure adjacent to the test set's keypad face, so that the microphone holder is retained adjacent to an acoustic coupling port, and the keypad's keys are accessible by way of keypad apertures in the keypad face. A printed circuit board urges the keypad unit into engagement with the keypad support structure. The keypad unit and the printed circuit board have sealed aperture arrangements through which electrical leads of the microphone pass for connection to the circuit board.

Abstract: A telecommunication test system for a line to be tested includes a test measurement device coupling with the line. The test measurement device determines parameter measurement data from the line. A processor receives the parameter measurement data. A first communication path between the test measurement device and the processor transmits the parameter measurement data. The first communication path is a wireless path. A mobile facility communicates with the processor. The communications are via a second communication path which includes a primary wireless path and a back-up wireline path. A central office and a data test place various signals on the line being tested. A third communication path between the mobile facility and at least one of the central office and the data test center is provided. The third communication path includes a primary wireless path and a back-up wireline path.