Power distribution modules in distributed antenna systems include fan monitoring circuits for indicating an alarm condition to head-end equipment. The alarm condition can be used by system operator/owners that a fan is drawing excessive power, thereby detracting from system performance, or indicating that the fan may fail. The alarm condition signal can be returned to the head-end equipment via an uplink communication path between a remote unit powered by the module and the head-end equipment.

Systems for low power distribution in a power distribution network (PDN) contemplate using multiple low-power conductors to convey power from a power source to a remote sub-unit. The multiple conductors are isolated from one another to help prevent overcurrent conditions in a fault condition. In a first exemplary aspect, the isolation is provided by galvanic isolation. In a second exemplary aspect, the isolation is provided by diodes at the remote sub-units. Further, current sensors may be used at the power source to detect if any of the multiple low-power conductors are carrying current above a defined threshold current. By providing one or more of these safety features, a multiplexer may not be needed at the remote sub-unit, thus providing cost savings while preserving the desired safety features.

Provided is an apparatus of recognizing optical connector connection including an IC tag connection unit configured to provide bus power and detect whether the optical connector is connected to an optical adapter, an IC tag configured to store an IC tag ID uniquely given to the optical connector, which is connected to a corresponding optical cable, and to receive the bus power to be driven for bus communication, and an IC tag ID obtaining unit configured to obtain the IC tag ID stored in the IC tag through the IC tag connection unit, when the optical connector is connected to the optical adapter.

Disclosed is a device (1000) for providing power to one or more Optical Network Utilities (NUs) (1100) in an optical network (1300) used to provide communication to a plurality of devices (1400) of subscribers. The device (1000) includes one or more Power over Ethernet (POE) adapters (1200) operatively coupled to the subscriber devices. The POE adapters are configured to derive AC power and data signals from the plurality of devices, and convert the derived AC power into DC signals. Further, the device includes a Power over Ethernet (POE) splitter (1500) operatively coupled to the POE adapters. The POE splitter is configured to split the DC signals from the data signals, and feed the DC signals to the one or more NUs for satisfying their power needs.

Embodiments herein describe an intelligent optical cable that includes an optical assembly disposed between two pluggable connectors. In one embodiment, the optical assembly in the intelligent optical cable are coupled to the pluggable connectors via respective ribbons, where first ends of the ribbons are connected to the optical assembly while second ends of the ribbons are connected to respective pluggable connectors. In one embodiment, the optical assembly includes a photonic chip which performs an optical function on the optical signals propagating in the optical cable.

A connection manner identification method includes power sourcing equipment separately sending load adjustment indications to powered devices by using data ports, where each load adjustment indication in the load adjustment indications indicates a corresponding powered device to adjust a load. The powered devices are separately connected to power supply ports of the power sourcing equipment by using power supply cables, and the powered devices are separately connected to the data ports of the power sourcing equipment by using data cables. The power sourcing equipment obtains output power changes of the power supply ports caused by load adjustment of the powered devices, and the power sourcing equipment determines, based on the output power changes, a first data port and a power supply port that are connected to a same powered device in the powered devices.

The invention relates to a power-over-fiber (PoF) system, comprising: an optical source configured to generate an optical signal, wherein the optical signal comprises an intensity modulation; an optical fiber configured to receive the optical signal from the optical source and to guide the optical signal; an optical sink, which is configured to receive the optical signal from the optical fiber and to convert the optical signal into an electrical signal; a detection unit, which is configured to detect at least one characteristic of the electrical signal, wherein the characteristic is at least partially caused by the intensity modulation of the optical signal; and a control unit, which is configured to control the optical source based on the detected characteristic.

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit.

A system and method for providing optical multiple input and multiple output data communication using optical signals includes a plurality of light sources, a plurality of photodetectors, and at least one controller. The plurality of light sources are configured to emit optical signals to communicate data. The plurality of photodetectors are configured to sense the optical signals, and are embedded in at least one receiver. At least one of the plurality of photodetectors is configured to receive the optical signals from two or more of the plurality of light sources. The controller is configured to assign a transmit power to at least some of the plurality of light sources based on parameters of the plurality of photodetectors.

The present application relates to a method and apparatus for transmitting a data signal between a stator ring and a rotor ring including generating, by a transmitter, a transmission signal in response to receiving the data signal, transmitting, by a plurality of optical transmitters coupled to an inner surface of the stator ring, the transmission signal to a plurality of detectors coupled to an outer surface of the rotor and wherein the optical transmitters are configured to transmit the transmission signal towards a focus of the stator ring, summing a plurality of representations of the transmission signal received by each of the plurality of detectors to generate a summed transmission signal, and extracting, by a receiver, the data signal from the summed transmission signal.