A system includes a plurality of controllers associated with the plurality of units of building equipment, each controller comprising a plurality of communication ports, a plurality of cables connected to the plurality of communication ports and linking together the plurality of controllers, wherein the plurality of controllers are configured to self-identify a break in a connection between two the plurality of controllers by monitoring statuses of the plurality of communication ports. The system also includes circuitry configured to receive a signal indicative of the order of the connections between the plurality of controllers from the plurality of controllers, generate a graphical map of the order of the connections between the plurality of controllers based on the signal, receive, from the plurality of controllers, an indication of a break in a connection between two of the plurality of controllers, and update the graphical map to indicate the connection as broken.

The present invention identifies the cause of an anomaly, if any, in a signal input via a cable. A master device (13) comprises an acquisition unit (1321) which acquires the signal quality of a signal input via a cable, and a cause determination unit (1323) which performs cause determination for determining, from variations in the signal quality, whether the cause of noise included in the signal is due to a mechanical factor or is due to electrical noise.

A system for performing work on electrical power lines and/or splices on electrical power lines comprises an unmanned aerial vehicle (UAV), a power line tool adapted to perch on an electrical power line and/or a splice on an electrical power line, a support frame selectively releasably attached to the UAV, and a plurality of flexible dielectric support lines attaching the power line tool to the support frame. Each of the support lines are attached to a corresponding attachment point on the support frame and a corresponding attachment point on the power line tool.

A system for performing work on electrical power lines and/or splices on electrical power lines comprises an unmanned aerial vehicle (UAV), a power line tool adapted to perch on an electrical power line and/or a splice on an electrical power line, a support frame selectively releasably attached to the UAV, and a plurality of flexible dielectric support lines attaching the power line tool to the support frame. Each of the support lines are attached to a corresponding attachment point on the support frame and a corresponding attachment point on the power line tool.

A passive component for coupling to, and thereby tracking, an intermediary device within a cable television system is disclosed. The passive component includes a tracking circuit separate in functionality from an existing circuit of the intermediary device. The tracking circuit, which is unpowered and uncontrolled, receives a first signal from a first device in the cable television system, modifies the first signal to create a modified signal, and passes the modified first signal to a second device in the cable television system, the second device being configured to determine a type for the intermediary device based on the modification to the first signal. The first device is one of a cable modem or a CMTS, and the second device is the other of the cable modem and the CMTS.

A passive component for coupling to, and thereby tracking, an intermediary device within a cable television system is disclosed. The passive component includes a tracking circuit separate in functionality from an existing circuit of the intermediary device. The tracking circuit, which is unpowered and uncontrolled, receives a first signal from a first device in the cable television system, modifies the first signal to create a modified signal, and passes the modified first signal to a second device in the cable television system, the second device being configured to determine a type for the intermediary device based on the modification to the first signal. The first device is one of a cable modem or a CMTS, and the second device is the other of the cable modem and the CMTS.

A pipeline AC mitigation SSD Marker Station has a shape and land surface area footprint that are similar to conventional pipeline location markers or corrosion test stations. The SSD Marker Station includes an SSD device that connects an underground metallic pipeline to an underground grounding conductor. The SSD Marker Station further includes a disconnect switch configured to disconnect the SSD device from the pipeline and/or grounding conductor. Also included is a pair of testing ports that are in electrical communication with the SSD device. Testing of the SSD device thereby requires only operating the disconnect switch to isolate the SSD device from the pipeline and/or grounding connector and performing an electrical measurement across the testing ports. In embodiments, the SSD Marker Station meets all requirements applicable to a pipeline location marker, and can be installed in lieu of a pipeline location marker.

A communication circuit includes first and second communication nodes including first and second control chips, respectively, and first and second communication chips connected to the first and second control chips, respectively. The first and second communication chips are connected to each other through first and second signal lines, and are configured to transmit a differential signal. The first communication chip includes an output port to output a level signal obtained from the differential signal to the first control chip. The communication circuit further includes a voltage division assembly connected to the first and second signal lines, and configured to cause a voltage value of the first signal line to be higher than that of the second signal line when the first and second signal lines are in idle state. The first control chip includes a detection port connected to the output port to acquire the level signal.

A communication circuit includes first and second communication nodes including first and second control chips, respectively, and first and second communication chips connected to the first and second control chips, respectively. The first and second communication chips are connected to each other through first and second signal lines, and are configured to transmit a differential signal. The first communication chip includes an output port to output a level signal obtained from the differential signal to the first control chip. The communication circuit further includes a voltage division assembly connected to the first and second signal lines, and configured to cause a voltage value of the first signal line to be higher than that of the second signal line when the first and second signal lines are in idle state. The first control chip includes a detection port connected to the output port to acquire the level signal.

In a failure location identification apparatus according to one embodiment, a facility information management unit records therein facility information including positional information of a physical resource, an external factor information management unit records therein external factor information concerning an external factor that possibly becomes a factor that causes a failure in the physical resource, the external factor information including positional information of the external factor, and a facility influence definition management unit records therein information concerning a possible influence of the external factor on the physical resource. A facility influence determination process unit identifies a failure occurrence location at which the failure is estimated to occur in the physical resource, from the facility information that is recorded in the facility information management unit and has positional information corresponding to the positional information of the external factor information, and outputs failure location information including information indicating the identified failure occurrence location, when it is determined that the external factor information recorded in the external factor information management unit influences the physical resource, on a basis of the information recorded in the facility influence definition management unit.