Adtran Gmbh

Steven M Robinson

John S McGary

Ralph R Boudreaux, Jr

Scott L Smith

Daniel M Joffe

Jeremy Jacob Zoller

John B Wilkes, Jr

Brian Smith

James B Wiese

Bradley Dwayne Tidwell

James Michael Hawkins

Richard Lee Goodson

Kevin W Schneider

James M Glass, Iii

Paul Graves McElroy

Jason Ryan Ferguson

Jason Perry Lyon

Barry C Zitting

Joseph H Christ

Peter Campbell

Jeffrey K Taylor

Robert S Kroninger

A surge protection device includes an isolating transformer configured to conduct an Ethernet data signal on a wire pair and configured to provide voltage surge protection for Ethernet equipment coupled to the wire pair, and a power supply coupled to the isolating transformer and configured to conduct a DC voltage signal from the wire pair and configured to provide voltage surge protection for the Ethernet equipment coupled to the wire pair.

System and method for isolating and protecting a PoE (power over ethernet) device

The present disclosure generally pertains to systems and methods for powering service units. A service unit has a plurality of first transceivers coupled to a plurality of customer premises (CP) transceivers via drop connections, and each of the drop connections is coupled to a respective one of the CP transceivers. The service unit has forwarding logic that is configured to forward data packets to the first transceivers. The service unit further has a power management unit configured to receive electrical power from at least one of the drop connections and to power at least one component of the service unit based on the received electrical power.

Systems and methods for powering a service unit

An optical communication system includes a plurality of Customer Premises Equipment (CPE) each having a reverse power supply and configured to transmit and receive data and provide power over a wire pair connected thereto. An optical network unit is formed as a plurality of communication ports. A respective communication port is configured to provide communications data service with a respective CPE by transmitting and receiving data therewith. A power management circuit is connected to the communication ports and configured to receive power provided by each reverse power supply at a respective CPE and manage power consumption in the ONU. A processor is configured to receive alarms generated by at least one of a CPE and ONU indicative of a power fault condition and process the alarms and discriminate between different power fault conditions.

Optical network unit with redundant reverse powering from customer premises equipment with alarm fault discrimination indicative for power fault condition

In accordance with a non-limiting example, an optical communications system includes a plurality of Customer Premises Equipment (CPE), each having a reverse power supply circuit and each connected to a wire pair and configured to transmit and receive data and provide reverse power over the wire pair. An Optical Network Unit (ONU) includes a plurality of communication boards. A respective communication port is connected to a selected wire pair and its associated CPE through which data is transmitted and received and power received therefrom. A power management circuit is connected to each of the communication ports and configured to receive power and provide power sharing and manage power consumption and power supply redundancy from the plurality of CPE through the communication ports.

Optical network unit with redundant reverse powering from customer premises equipment

The present disclosure generally pertains to systems and methods for swapping span power modules that are used for supplying power to network interface units (NIUs). A span power module in accordance with one exemplary embodiment of the present disclosure has logic capable of communicating with logic of another span power module. When one module is to be swapped for the other module, the module being swapped-in is configured to automatically disable the other module shortly after it has powered up and is supplying electrical power across a span line. The amount of time that both modules supply power to the span line is sufficiently small such that damage to electrical communication equipment receiving power from the span line is prevented.

Systems and methods for swapping span power modules in telecommunication networks

A power supply and associated method include a power supply converter having a power output and configured to provide a supply voltage through the power output to a communications device. A simplified boost circuit is connected to the power supply converter in parallel but isolated from the power supply converter's bulk input capacitance during normal operation. The boost circuit includes at least one power storage circuit and a charging circuit connected thereto and configured to charge and maintain the power storage circuit to a predetermined voltage and switch the power storage circuit into the power supply converter during an undervoltage condition to transfer the stored power from the power storage circuit to the power supply converter and maintain the supply voltage to the communications device connected thereto for a required hold-up time.

Power supply and method that maintains supply voltage in communications systems during a power supply interruption

An adaptive power supply span powers devices used in telecommunications. It includes a power circuit and control circuit that receives power and sense signals therefrom and provides a control signal thereto and distinguishes between a first network interface load having a constant voltage input power requirement and a second network interface unit load having a constant current input power requirement. A voltage control circuit and current control circuit are interconnected together and connected to the power circuit. A control signal from the voltage control circuit and current control circuit extends to the power circuit. The control circuit maintains a fixed output voltage for constant voltage regulation for the first network interface unit load, if the output current remains below a threshold current. The circuit limits the output current to a regulated value for constant current regulation below the initial maximum value for powering a second network interface unit if the initial output current is greater than the threshold current for a time greater than a threshold time.

Adaptive power supply for telecommunications networks

A power supply includes a rectifier circuit having a rectifier mode and a voltage doubler mode. An AC switch is coupled to the rectifier circuit and switches the rectifier circuit into the rectifier mode when a higher AC line voltage is supplied and a voltage doubler mode when a lower AC line voltage is supplied. A control circuit is connected to the AC switch and detects the higher or lower AC line voltages and is operable for latching the rectifier circuit in the rectifier mode when the higher AC line voltage is detected and in the voltage doubler mode when the lower AC line voltage is detected. The latch circuit maintains a latched configuration in either the rectifier or voltage doubler mode during voltage transients and in the rectifier mode during start-up transients.

Power supply using double latch circuit for automatic input voltage range programming

A method and apparatus detects a ground fault on a span-powered telecommunication wireline within a plurality of span-powered wireline segments, to respective ones of which DSL-Cs are coupled, so that a ground fault may be detected when power is delivered by the DSL-C over a respective wireline segment to a respective downstream functional RT. A respective DSL-C measures a first voltage across a first sense resistor representative of current flowing in a first portion of its wireline segment to the RT, and also measures a second voltage across a second sense resistor representative of current flowing in a second portion of the wireline segment from the RT. In response to a difference in the first and second voltages an output representative of a ground fault in that wireline segment is generated.

Technique for independent ground fault detection of multiple twisted pair telephone lines connected to a common electrical power source

Whether or not protection circuitry for a span-powered remote digital subscriber loop unit is properly connected to earth ground is determined by the deliberate assertion and detection of a ground fault from a central office line card location. The span-powered remote unit is augmented to place a controllable conduction path in circuit with the span-powered loop and an earth ground pin. If the earth ground pin has been properly connected to earth ground, applying the conductive path will place a ground fault on the span, which is detected by a ground fault detector within the central office line card. If the ground fault detector does not detect a ground fault in response to the application of the conductive path, the line card forwards a negative ground fault event message to a test center, so that a service technician may be dispatched to the remote unit to correct the problem.

Method of detecting remote ground condition

A central office transceiver-installed current limiter and regulator provides fault isolation and transient load isolation in a wireline communication network, having multiple transceivers connected by respective span-powered wirelines to a common power source at the central office. Using a current-sense resistor and controlled switch in series with the wireline, the current-limiter and regulator processes input electrical power from the power source prior to coupling that power to a remote transceiver. To prevent overheating and substantial power dissipation in the current-limiting circuitry in the event of a prolonged fault condition, the controlled switch is alternately turned on and off.

Technique for fault isolation and transient load isolation for multiple electrical loads connected to a common electrical power source

A ground fault current-limiting circuit for limiting telecommunication wireline voltage and ground fault current to prescribed safety parameters has a ground fault current sense resistor and associated line voltage control circuit installed in a ground-coupling link to the center tap of the output winding of a bipolar voltage converter's output transformer. The control circuit compares ground fault current of either polarity flowing through the sense resistor to a prescribed value. In response to this current limit being exceeded, the control circuit produces an output signal that causes the power source to reduce its output voltage so that the ground fault current will drop to within acceptable limits.

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Madison, AL, United States of America

Steven M Robinson