Abstract: Doppler shift compensation by interpolation of a new sample between successively received signal samples using stored values of an interpolation function. The interpolation function has a non-zero amplitude in an argument range symmetrical about zero argument and zero amplitude outside the range. The time location of a new sample is shifted relative to a pair of received signal samples by an amount corresponding to a Doppler shift. The amplitude of the new sample is computed at a new sample index by combining the pair of received signal samples with corresponding samples of the interpolation function, each corresponding sample of the interpolation function being that sample whose argument is a difference between a corresponding one of the first and second indices and the new sample index. Due to the symmetry properties of the interpolation function, this operation requires as little as two multiply operations and one add operation for each new sample.

Abstract: Intelligent network (IN), comprising at least one Service Switching Point, SSP (2), at least one Service Control Point, SCP (3), one or more Intelligent Peripherals, IPs (5), and/or one or more Voice Response Systems, VRSs (4), which IN is capable of interacting with a PSTN or ISDN (1). The essence of the concept is an additional interface, in the form of a control member (6), between the IPs and/or VRs on one side and the Service Control Point(s) on the other side. Such makes it possible that the (advanced) IPs and VRSs are capable of exchanging all sorts of information with the SCP, without the IPs or VRSs consequently being occupied for an extended period of time. As a result, the SCP may dispose of (additional) information which in a regular IN cannot be made available to the SCP(s).

Abstract: System for coupling the public telephone network to the Internet using a number of Points-of-Presence, or PoPs, arranged between the public telephone network, or Public Switched Telephony Network PSTN, and an Internet Service Provider, or ISP. There, a PoP is executed such, that it can switch a received signal through to more than one ISP. To that end, the PoP comprises a system that can be chosen from the public telephone network by various numbers, in which the chosen number determines which ISP is contacted. The invention also relates to a PoP for applying the system described above, said PoP being executed such, that it can be switch a received signal through to more than one ISP.

Abstract: A method is provided for testing a communication circuit. Power is applied to a clock recovery circuit. A precharge bit is provided to the clock recovery circuit after applying power to the clock recovery circuit. A predetermined number of pulses is provided to a charge pump coupled to a voltage controlled oscillator to initialize the voltage controlled oscillator to near an operating frequency.

Abstract: Apparatus and an accompanying method for an optical scrambler and particularly one that provides randomly scrambled states of polarization (SOPs) in an optical fiber. Specifically, polarization independence is achieved by wrapping a single optical fiber around each tube in a cascade of separate piezoelectric tubes, with random amounts of fixed birefringence separating each tube, where each tube is then separately excited on a time-varying basis. The tubes are arranged in two groups. Each tube in the first group is separately excited by combined frequency/amplitude modulation with illustratively different modulating frequencies and amplitudes, and in the second group is excited at illustratively a constant frequency and voltage. Time-varying birefringence produced by each tube perturbs an initial SOP of the light provided by that tube from its original pseudo-stationary position as depicted on a poincaré sphere.

Abstract: A connector assembly for protecting against cable discharge with respect to static charges that may accumulate on cables and other conductors. The connector assembly comprises a modular plug that mates with a modular jack. The modular jack comprises a plurality of resilient contacts that connect to rigid contacts on the modular plug when the plug and jack mate. The modular jack also supports a grounding conductor such that the jack contacts connect to ground when the jack and plug are unmated. As the plug and jack begin to mate, the jack contacts connect a ground potential to the plug contacts, thereby discharging to ground any static charge that may be stored on the cable. As the jack and plug continue to mate, the plug contacts disconnect the jack contacts from the grounding conductor. When the jack fully mates with the plug, cable conductors connect to an electronic circuit via the jack and plug contacts.

Abstract: A method in a communication circuit recovers a clock signal. A voltage controlled oscillator is initialized by supplying a predetermined.number of pulses to a charge pump coupled to the voltage controlled oscillator so as to initialize the voltage controlled oscillator to near an operating frequency upon power up of . the clock recovery circuit.

Abstract: A vibraphone provided with at least one series of sound bars with resonance tubes provided thereunder, while above at least a number of the resonance tubes a shaft extends, provided with a series of fans, while driving means are provided for rotation of the or each shaft about its longitudinal axis, such that the fans rotate above the respective resonance tubes, while at least one slip coupling is provided, positioned such that a couple that can be transferred by the driving means to the shaft and/or a fan is limited.

Abstract: A timer reservation device has a reservation data store section, a reservation history store section and a clock section. The reservation data store section stores recording reservation dataset for reservation. The reservation history store section stores recording reservation data concerning recording which was executed. The clock section outputs present month and day, time, and ay of the week data. The day of the week data of the recording reservation data in the reservation history store section is compared with the day of the week data from the clock section. Month and day data of the recording reservation data is changed to be stored in said reservation data store section.

Abstract: A device for determining quality of an output signal to be generated by a signal processing circuit, including a radio link, with respect to a reference signal. The device has a first and second series circuits for receiving the output signal and the reference signal, respectively. The device generates an objective quality signal through a combining circuit coupled to the two series circuits, wherein a scaling circuit is disposed between the two series circuits for scaling at least one series circuit signal. A poor correlation between the objective quality signal and a subjective quality signal to be assessed by human observers can be considerably improved by disposing a discounting arrangement inside the combining circuit, and coupling the discounting arrangement to the scaling circuit so as to receive a comparison signal and discount the comparison signal while generating the objective quality signal.

Abstract: A cup having a safety structure has a cylindrical sidewall and a bottom wall closing a lower end of the sidewall. The cup has a bottomed cylindrical shape. The sidewall has at least one protrusion protruding outward in such a size and a shape as to hook a finger of a user. The protrusion may have substantially a linear shape extending along a circumference of the sidewall. Alternatively, the protrusion may have a broken line shape or a dot-chain line shape extending along a circumference of the sidewall. Alternatively, the protrusion may have a curved portion extending along a circumference of the sidewall so as to correspond to an outer edge shape of a palm between a thumb and an index finger of the user.

Abstract: An impedance converter module has a phase reversal circuit to receive a 2-wire excitation signal at first and second terminals, and to provide a polarized excitation signal with a predetermined polarity based on the 2-wire excitation signal. A series current path has a sense resistor connected in series with a variable impedance source. The polarized excitation signal is applied across the series current path. An output-voltage-sense circuit provides an output-voltage-sense signal based on a voltage across the series current path. A current mirror provides a drive signal to a ratiometric device based on current flowing through the series current path. Differential amplifiers receive a ratiometric response signal from the ratiometric device, and output measurement signals based on the ratiometric signal. A summing node combines the measurement signals to provide a single-ended ratiometric signal.

Abstract: A LAN modem permits unambiguous routing for multiple workstations located on a LAN to each gain access through the LAN modem to any one of a number of different remote servers located on a number of different remote networks using a combination of public port number and public address of the workstation. There are instances where sessions are changed between the same workstation/server. This changing of sessions changes the public port numbers associated with each session, which destroys the above unambiguous routing, since the combination of a public destination IP address and a private destination port number is no longer the same unique value contained in an address translation table of the LAN modem. A four step hierarchical procedure is provided in which the LAN modem determines which workstation the packet is to be routed based upon value of fields stored in the network address translation (NAT) table or value of fields stored in a static table.

Abstract: A system and method for providing a shortened DSP reset pulse to cause a modem to reset and enter a sleep mode as soon as possible after receipt of an external reset pulse issued by a host. A reset controller detects the external reset pulse, issues a separate reset pulse to the modem, monitors the modem's clock and then terminates the separate reset pulse after a prescribed duration. The prescribed duration is determined by the minimum time required by the DSP to reset. The invention is embodied in a modem connected to an external controller. The modem includes a DSP having a reset terminal and a clock. The DSP begins performing a reset upon a first signal applied to its reset terminal and causes the modem to enter a sleep-mode after a second signal is applied to its reset terminal. The external controller is capable of transmitting an external signal. The reset controller in the modem has a counter and an output node.

Abstract: A technique for inclusion within, e.g., ISDN DTE, and use in conjunction with an ISDN terminal adapter (as DCE) for automatically providing ISDN switch type detection and SPID configuration. Specifically, switch type detection occurs by analyzing D-channel ISDN initialization messages received from the local ISDN switch as well as, subsequently, where appropriate, responding D-channel ISDN messages, received from the switch to specific ISDN messages sent by the adapter. If the switch type is one that requires a SPID, a SPID is formed using a predefined generic NI-1 format, for each B-channel through which communication is being established, and sent to the switch, using an NI-1 terminal initialization request, to invoke initialization.

Abstract: An image pickup signal extracted by a gate circuit is applied to a brightness signal generating circuit and a brightness signal is generated. By a high pass filter, high frequency component of the brightness signal is extracted. A digital integrator integrates high frequency signals of one image plane, and outputs the result as an evaluating value to a CPU. CPU detects a situation where there are two peaks of focus evaluating values and the position having maximum focus evaluating value does not correspond to the optical in-focus position, and drives a focus motor such that a focus lens is set at an position where the focus evaluating value is smallest between the two peaks.

Abstract: An optical fiber tap for transferring optical energy out of an optical fiber having an optical fiber with a short tapered section for coupling optical energy into cladding modes, and a surrounding glass body fused to the optical fiber with the glass body having a polished surface positioned at an angle so as to reflect, by total internal reflection, cladding mode energy away from the optical fiber. An additional glass encapsulating tube is fused to and hermetically seals the glass body and tapered fiber section. For use in an optical power monitor, the optical fiber tap is integrated into a standard electronic package containing a photodiode to convert the tapped-out optical energy into an electrical signal representing the optical energy carried by the optical fiber.

Abstract: In one embodiment, a method is provided for testing using a programmable tester to generate a driven three state signal having a data rate faster than a maximum selectable rate of test vectors. The test vector has vector characters, each controlling a test state of a pin of a device under test. The method includes selecting a vector rate slower than a desired data rate of the driven three state signal and controlling a tester I/O device during a vector period to provide an output signal having a driven high state, a driven low state, or an inhibited state. The output signal is supplied to an input of a pull-to-center circuit adapted to provide a driven high state, a driven low state, or an output driven to a state intermediate of the driven high and the driven low states when the input of the pull-to-center circuit is supplied with an inhibited state at the input. The three state signal is utilized in testing the device under test.