Abstract:
A method for interaction among individuals using mobile communication devices equipped with lasers and optical receivers without requiring use of mobile numbers. An initial message is either communicated in full directly from sending to receiving device or alternatively message contents are first uploaded to a common application server and a unique identification code is transmitted to the receiving device and used to retrieve the full message from the server. The method of transmission by sender device to be optical or infrared laser and received by devices equipped with an optical or infrared receivers. Interactions subsequent to the initial message may not require use of a laser and can be facilitated via the common application servers without any requirement for parties to divulge personal identifying information. Such initial interaction by method thus described may require permission from, or be limited by, venue operators or jurisdictional governance.
Abstract:
A multi-dwelling unit (MDU) module is configured for providing telephony communicating services and non-telephony services. The MDU module includes a motherboard and a plurality of service units connected to the motherboard. Each one of said service units and the motherboard are jointly configured for providing non-telephony service and telephony service to a plurality of service subscribers. The motherboard is configured for providing overload power management to limit power consumption associated with said telephony services during an overload condition and for providing lifeline power management to limit power consumption associated with said non-telephony services during a power outage condition. The MDU module optionally includes lightning primary surge protection blocks configured for being connected to the service units. The MDU module includes a passive heat dissipation assembly that is configured for absorbing heat generated by the motherboard and the service units and for passively dissipating the heat.
Abstract:
There is disclosed a circuit, using integrated techniques, for dividing the AC component of an input signal by the DC component of that signal and then muitiplying the signal by a fixed DC current. This circuit is useful in opto-coupled gain control devices where the output AC signal must be gain adjusted for the light transfer characteristics of the opto-couplers.
Abstract:
Fiber optic terminals, systems, and methods for providing differentiated network services to subscribers of a fiber optic network are disclosed. In certain embodiments, fiber optic terminals and methods are disclosed for providing more than one network service to subscribers supported by the same fiber optic terminal. In one embodiment, a fiber optic terminal is provided comprising a first optical path connected to a first network-side optical fiber providing a first network service to a first subscriber-side optical fiber. The fiber optic terminal also comprises a second optical path connected to a second network-side optical fiber providing a second network service differentiated from the first network service to a second subscriber-side optical fiber. In this manner, differentiated network services can be provided to subscribers supported by the fiber optic terminal by configuring connections of the subscribers to either the first optical path or second optical path in the fiber optic terminal.
Abstract:
An optocoupled line circuit is arranged with a diode bridge providing uniform direction current flow so as to eliminate the mechanical switch hook contact of the prior art. A zener diode is used to bridge a clipped version of AC ringing current across the optocoupler when the circuit is in the on-hook condition. Current presented to the optocoupler from a line control device allows current to flow from the telephone line through the line interface circuit.
Abstract:
A combined loop current sink, battery detector, and ringing detector circuit as used in a channel unit at a telephone central office connection to a digital loop carrier circuit, to provide off-hook and on-hook signaling to analog switching circuits, and to simultaneously receive normal battery and ringing signals from the analog switching circuits. The combined circuit includes tip and ring connections to the digital loop carrier circuit to provide telephone service, a loop input controlled by logic circuits, at the telephone central office, and a battery output connected to the logic circuits. A first optocoupler, is connected to the loop input and also to ground, for providing a floating voltage coupling for the loop input to the circuit. A second optocoupler, is connected to the battery output and also to ground, for providing a floating voltage coupling for the circuit output. A transistor circuit has an input coupled to the first optocoupler and an output coupled to the second optocoupler. The logic circuits send an on-hook signal by applying a zero volt ground signal to the loop input so that no current flows through the first optocoupler, and an off-hook signal by a positive volt signal to same input so current flows through the first optocoupler.
Abstract:
In an optical telephone wherein amplitude modulated light is converted to sound by applying the modulated light to an enclosed volume of gas wherein the volume and/or pressure of gas varies in synchronism with the instantaneous energy of the modulated light and wherein an optical fiber is used as the transmission element, the improvement is provided by the means to more uniformly distribute the optical energy in the gas cell causing an improved and more efficient conversion of the modulated light directly into sound.The means can be provided by covering the light entering side with a positive lens and positioning the optical fiber at the focal point of the lens.
Abstract:
The disclosed four-wire to two-wire converter employs a pair of dual detector opto-isolator circuits to both linearize the converter transfer characteristic and eliminate signal feedback between ports. This is accomplished by feeding back the signals transmitted by the transmit portion of the four-wire port through the auxiliary detector of the opto-isolator circuit connected across the two-wire port to prevent signal feedback to the receive portion of the four-wire port. This opto-isolator feedback arrangement eliminates the need for complex feedback and impedance matching circuitry thereby enabling direct connection of the opto-isolator circuits to the communication paths while also rendering the converter circuit transparent to signals appearing thereon.
Abstract:
A telephone set for optical fibers lines having a coupler for directing a first part of the light received from the input optical fiber on a photo-cell and a second part of this light on a microphone modulating this second part without electrical intermediate apparatus, the photo-cell feed alternately a bell or a receiver, and the light modulated by the microphone is directed via a dialling system on the output optical fiber.
Abstract:
Digital data is optically broadcast through an environment by controllably switching the brightness or chrominance of LED solid state lamps, or of other illumination sources (e.g., television screens and backlit computer displays). This optical data channel is useful to convey cryptographic key data by which devices within the environment can authenticate themselves to a secure network. In some embodiments, the optical modulation is sensed by the camera of a smartphone. The row data output by the smartphone's camera sensor is processed to extract the modulated data signal. In some monochrome embodiments, data communication speeds far in excess of the camera's frame rate (e.g., 30/second), or even the camera's row rate (e.g., 14,400/second) are achieved. Still greater rates can be achieved by conveying different data in different chrominance channels. A great number of other features and arrangements are also detailed.