41 results about "Telecommunication circuit" patented technology

An electrical circuit for providing electrical power for use in powering electronic devices, such as monitors, televisions, white goods, data centers, and telecom circuit boards, is described herein. The electrical circuit includes a voltage reduction circuit and a rectifier circuit for delivering input power signal to the voltage reduction circuit. The voltage reduction circuit is configured to receive an input power signal and generate an output power signal at a lower voltage level. The rectifier circuit includes a full wave bridge rectifier coupled to the electrical power source, a Zener based charging circuit coupled to the full wave bridge rectifier, a voltage divider coupled to the Zener based charging circuit and the full wave bridge rectifier, and an output terminal coupled to the full wave bridge rectifier, the Zener based charging circuit, and the voltage divider for delivering the input power signal to the voltage reduction circuit.

A mobile telecommunication device including at least one telecommunication circuit; at least one subscriber identification module; at least one assembly including at least one supply battery; and a switch of selection between a power supply of the subscriber identification module by the assembly and by the telecommunication circuit according to the presence or not of a near-field communication module in the assembly.

An electrical circuit for providing electrical power for use in powering electronic devices, such as monitors, televisions, white goods, data centers, and telecom circuit boards, is described herein. The electrical circuit includes a voltage reduction circuit cell that includes a first capacitor, a second capacitor, a switching circuit, and a hold capacitor. The switching circuit includes a plurality of switching devices that are coupled to the first and the second capacitors for delivering power from an input terminal to an output terminal. The plurality of switching devices includes at least two switching devices that are coupled to ground. The voltage reduction circuit cell also includes a controller for operating the switching circuit in a plurality of operational modes to deliver an output power signal at a desired voltage level.

Embodiments according to the present invention allow multiple parties equipped with telecommunications devices (endpoint devices) of similar or differing audio capabilities to join in a conference call and enjoy the fidelity associated with their equipment. Rather than operating with the frequency and fidelity limits of traditional telecommunications circuits (for example, about 300-3500 Hz), at least a portion of a conference bridge according to the present invention operates at higher frequencies. Conference participants using high-fidelity endpoint devices hear each other with greater clarity and reproduction accuracy. Conference participants using conventional interfaces send and receive lower-fidelity audio, but it affects only their own participation and not that of the entire conference. Participants can connect via for example, wireline, wireless Public Switched Telephone Network (PSTN), or via networks such as the Internet. Multiple voice encoding schemes are accommodated.

A transmission channel for a subscriber line interface circuit comprises a front end, tip/ring current-sensing transimpedance stage, containing relatively low valued tip and ring sense resistors coupled in circuit with tip and ring paths of a telecommunication wireline pair. The front end transimpedance stage transforms differential tip and ring input currents sensed by the tip and ring sense resistors into a single ended voltage, which is coupled to a transconductance amplifier filter/gain stage. The filter/gain stage is configured to provide a programmable output impedance, and converts the voltage from the current-sensing transimpedance stage into an output transmission voltage for application to a selected one of a current-sense, voltage-feed, or voltage-sense, voltage-feed telecommunication circuit.

A method and apparatus for determining and monitoring the status of telephone calls in a Next Generation Telephony Network (NGTN) is disclosed. The method detects protocols occurring between two or more network elements of a telecommunication circuit and control protocol used to initiate or to react to the events generated by the network elements. One sensor is connected to the telecommunication circuits to sense raw call progress signaling information indicative of an event relative to the call on the monitored line. Another sensor is connected to call control channel of a NGTN network element. The sensors are connected to a call processing system. The call processing system includes a call progress event analyzer module consisting of a call progress event processor and a call progress state machine, a NGTN event processor and a NGTN state machine. The call processing system also includes a protocol independent call processor module and a multi protocol analysis module. Raw call progress signaling information and NGTN message information are converted to logical call handling events and forwarded to the protocol independent call processor module for processing. The protocol independent call processor module includes a timer processor to keep track of timing of events. The call processing system also includes an alarm handler to keep track and generate alarms when an error condition occur after processing the call progress events and the NGTN message events.

An integrated overvoltage and overcurrent circuit protection device for use in telecommunication circuits. The integrated circuit protection device combines a overcurrent device such as a fuse and a overvoltage protection device such as a thyristor to respectively protect against overcurrent conditions and transient overvoltages. Integration of the two devices in a common package ensures proper coordination and matching of the components, reduces the final product cost and reduces the physical space required on a telecommunications circuit for overvoltage and overcurrent circuit protection.

A Test Access Matrix (TAM) system permits installation onto an existing connector block. The TAM system exhibits a configuration that permits installation on to telecommunications circuits at the connection point provided for installation of protection modules or other devices that are inserted into the telecommunications circuit. The installation can be accomplished either before new or after existing connector blocks are installed on a telecommunication cross connect frame, tie frame, or other support structure. The TAM system can be instructed to connect a two or four wire test bus to any of the individual telecommunications circuits that are connected to the connector block. The test bus can be connected to the individual communication circuits in either a bridging, break towards the distribution side of the local loop, break towards the telecommunications equipment, or an insertion into the line via a “make before break” sequence. The bus can be further redirected to multiple test or monitoring devices.

An interface device and method for testing a telecommunication circuit by utilizing a test cord that has a first end that is integrated with the interface device and a second end that terminates with a test connector. Upon insertion of the test connector into a test port of a connectivity block, the interface device may be configured to allow for monitoring of the telecommunication circuit, without disrupting the circuit. Similarly, the interface device may be configured to disrupt the telecommunication circuit and allow a user to examine both sides of the circuit.

According to the invention, systems and methods are provided for analyzing the diversity of a set of critical telecommunication circuits. For example, according to one embodiment of the invention, a method is provided for analyzing the diversity of critical telecommunication circuits, the method comprising: determining a critical circuit set comprising a first critical circuit and a second critical circuit; identifying a first set of telecommunication resources associated with the first critical circuit; identifying a second set of telecommunication resources associated with the second critical circuit; and comparing the first set of telecommunication resources with the second set of telecommunication resources to determine whether the critical circuit set is diverse.

The invention relates to an ultra-low power consumption long-distance electrocardiogram data wireless acquisition system. The wireless acquisition system adopts ANT (antenna) +GPRS (General Packet Radio Service) heterogeneous networking to match with an electrocardiogram acquisition band, solves the acquisition of mankind electrocardiogram data during exercises, enables coaches and athletes to deeply know intensity of training in order to improve exercise effect and also can satisfy the huge requirements of domestic medicine and health supervision for monitoring cardiac rates. The wireless acquisition system comprises an electrocardiogram data acquisition band and a wireless data retransmitting device, wherein the electrocardiogram data acquisition band comprises an electrocardiogram acquisition treatment circuit and a lead electrode, and the wireless data retransmitting device is a topological structure network comprising a remote telecommunication circuit and a main control computer. Compared with the prior art, the wireless acquisition system realizes the wireless acquisition of mankind electrocardiogram data during exercises, adopts an ANT+GPRS heterogeneous networking structure and realizes the low-power consumption long-distance transmission of data. The electrocardiogram data acquisition band has light and simple structure, is easy to wear by a measured human body and does not influence the motion and the daily activities of the measured human body.

The photo survey service system of the invention comprises an image information receiving means 12 for receiving image information from customer's terminal equipment 8 via a telecommunication circuit network 10, which image information is obtained by taking photographs of an area 4 under survey having a plurality of stations 2-1, 2-2, . . . 2-n from a plurality of points using a digital camera 6 at a fixed focal length, an analysis processing means 14 which uses computation processing to calculate a three-dimensional vector relation of each station from the received image information on the basis of a difference in parallax between both images of adjacent photographing points, and an analytical result transmitting means 16 for transmitting information on the calculated three-dimensional vector relation of each station to the customer's terminal equipment 8 via the telecommunication circuit network 10.

The invention discloses an electric energy meter RS485 communication failure detecting and self-healing device and method. The device includes a master RS485 communication circuit, a cascaded RS485 communication circuit and a plurality of slave RS485 communication circuits; the communication input end of the master RS485 communication circuit is connected with an RS485 bus; the signal output end of the master RS485 communication circuit is connected with the signal input end of a master RS485 communication-used MUX electronic switch; the signal input end of the cascaded RS485 communication circuit is connected with the RS485 bus; the signal output end of the cascaded RS485 communication circuit is connected with the signal input end of the master RS485 communication-used MUX electronic switch; the signal input ends of the slave RS485 communication circuits are connected with correspondingly RS485 buses; and the signal output ends of the slave RS485 communication circuits are respectively connected with corresponding slave RS485 communication-used MUX electronic switches. With the electric energy meter RS485 communication failure detecting and self-healing device of the invention adopted, fault self diagnosis, fault location, self isolation and self recovery can be performed on communication links in the RS485 in an intelligent electric energy meter.

An apparatus and method for the efficient mapping of connectivity of telecommunications circuits where large numbers of such circuits are terminated at one end in concentrated bulk terminations. The apparatus regenerates multiple speech signals in a bulk termination adapter identifying both the bulk connector and the individual circuits terminating in the connector. A selectable group identity code allows many such units to be employed simultaneously to effect efficient mapping of hundreds of telecommunications circuits in one step even if concentration points occur in disparate locations. Speech reproduction is accomplished through a serial bit stream where the ratio of one bits to zero bits, varying with time, re-establishes a voice frequency signal with the aid of a simple filter circuit.

The invention provides a tin liquid detection, a sumplementation method and device. The tin liquid detection and sumplementation method comprises steps of providing a first test rod which has a low bottom end and is close to a tin liquid surface inside a furnace chamber, providing a second test rod which has a high bottom end and is further away from the tin liquid surface inside the furnance chamber than the bottom end of the first test rod. The first test rod and the second test rod are connected to the first control device, wherein the first test rod and the second test rod respectively form a positive pole of a telecommunication guiding connection circuitto connect to the control device; the tin liquid inside the furnance chamber forms a negative pole of the telecommunication circuit to connect to the control device, such that the supplementation of the tin liquid inside the furnance chamber is performed.