Abstract: An automation network includes a plurality of data processing devices that are connected to one another for data communication. At least one data processing device in a first state, from the plurality of data processing devices, is preconfigured such that it generates corresponding messages upon identifying one or more security-relevant events. The messages are transmitted to at least one first software tool configured to record and evaluate the messages to determine whether there is a security-relevant attack on the automation network. The messages are transmitted to a second software tool configured to record and evaluate the messages and to determine whether the corresponding messages are generated by the at least one data processing device.

Abstract: A method of characterizing frequency fluctuations of a resonator comprising the steps of: a) driving the resonator, in a linear regime, by simultaneously applying two periodical driving signals having respective frequencies, the frequencies being different from each other and from a resonant frequency of the resonator, but contained within a resonance linewidth thereof; b) performing simultaneous measurements of response signal of the resonator at the frequencies of the periodical driving signal; and c) computing a value representative of a correlation between the measurements, the value being indicative of frequency fluctuations of the resonator. An apparatus for implementing such a method is provided.

Abstract: A method to detect dial tone on a telephone line may include taking samples of incoming audio on a telephone line. The method may also include determining volumes of the samples. The method may further include determining whether the volumes of a threshold number of the samples are at or above a threshold volume. The method may also include, in response to determining that the volumes of a threshold number of the samples are at or above a threshold volume, determining that the incoming audio on the telephone line includes a dial tone.

Abstract: This disclosure relates generally to call interception techniques, and more particularly to systems and methods for improved lawful interceptions for calls involving in-band DTMF signaling. In one embodiment, a method for implementing in-band dual-tone multi-frequency call interception is disclosed. The method may include receiving a call intercept request for a target user number at a soft switch. The method may also include initiating, by one or more processors, call monitoring of a call from a calling user to a call proxy system to capture in-band dual-tone multi-frequency signaling. Further, the method may include determining whether the dual-tone multi-frequency signaling corresponds to the target user number.

Abstract: The present invention relates to subsea control modules (SCMs). According to an aspect of the invention, there is provided a subsea control module (10) comprising a hydraulic manifold (12) and two separately retrievable subsea electronic modules (24a, 24b). The present invention also relates to a method of maintaining a subsea control module, and to a method of modifying an existing subsea control module.

Abstract: A method for modulating the effective power in one or several power consuming devices disposed in an A/C system in order to transmit data on a power supply line thereof by specifically varying the effective power in the connected device. In order to transmit the data, the momentary value of the effective power is randomly varied (increased or decreased), and the data is impressed into the A/C supply line by a unit (transmitter or modulator) and is evaluated by another unit (receiver or demodulator).

Abstract: A remote control system includes a mobile device and a receiver connected to a control target. The mobile device includes an input unit accepting user's input operation; an operation signal transmission unit wirelessly transmitting an operation signal corresponding to the input operation during the input operation; a frequency switching determination unit determining whether to switch the transmission frequency band from a first frequency band to a second frequency band based on at least any one of a manner of the input operation and a state of wireless communication; and a transmission frequency switching unit switching the transmission frequency band when the frequency switching determination unit determines to switch the transmission frequency band. The receiver includes an operation signal reception unit receiving the operation signal; and a control unit controlling the control target on the basis of the received operation signal.

Abstract: A barrier operator system is provided including a controller, a motor, a barrier, a power source, and a remote transmitter. The controller scans for a reduced range of radio frequencies while operating in a standby mode to conserve energy. In response to receiving a signal from the remote transmitter, the barrier operator will exit the standby mode and scan for a broader range of frequencies. In response to receiving a command signal from the remote transmitter, the controller will operate the barrier. The controller also scans for signals from an accessory device after exiting the standby mode. The accessory device may also operate in multiple modes with respect to scanning for transmissions and sending signals to the controller.

Abstract: An information access system includes a reader/writer device and an information storage device. In the information storage device, a receiver unit senses a carrier of an RF signal at a first frequency for detection, in a first time period occurring at time intervals, and receives an information request signal in response to detection of a carrier of an RF signal at the first frequency, and senses a carrier of an RF signal at a second frequency in response to reception of the information request signal. In the storage device, a control causes the receiver unit to sense a carrier of an RF signal at the first frequency for detection, in a second time period after a sleep time period which is shorter than the time interval, in response to non-detection by the receiver unit of a carrier of an RF signal at the first frequency in the first time period.

Abstract: A method used in a receiver includes measuring first Received Signal Strength Indications (RSSIs) in respective first communication channels, which are located in a given frequency band and which each have a first channel bandwidth. Based on the first RSSIs, second RSSIs are computed for respective second communication channels, which are located in the given frequency band and which each have a second channel bandwidth that is larger than the first channel bandwidth. At least one of the first and second communication channels over which to receive signals at the receiver are selected using the first and second RSSIs.

Abstract: The invention relates to a method and system in connection with a wristop diving computer (1). According to the method, at least the pressure of a gas bottle (2) is measured and the pressure data is transmitted under water using a low first frequency f1 to a wristop computer (1). According to the invention, on the surface of the water a second frequency f2, higher than the first frequency f1, is used for two-way telecommunications between the gas bottle (2) and the wristop computer (1).

Abstract: The invention relates to methods by which radio signals can be transmitted to, and received by, a radio receiver such that the receiver consumes very little power from a battery or energy source. The invention is applicable not only to medical implants, but any application requiring a radio receiver to operate with very low power consumption.

Abstract: Systems and methods are provided for controlling one or more servos coupled to a model vehicle. An input signal having a series of input pulses encoded at an input pulse repetition frequency is received at a receiver coupled to a model vehicle having one or more servos. The input signal is decoded at the receiver. A servo control pulse is generated using at least one of the input pulses at the receiver. The servo control pulse is outputted to at least one of the servos at an output pulse repetition frequency that is different from the input pulse repetition frequency.