A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

A system including a processor and sensor for installation inside an underground vault. The sensor monitors a parameter inside the vault and sends a monitoring signal to the processor. Based on the monitoring signal, the processor may provide data to a memory for storage and/or control signals to an interface for transmission to an external device located within the vault. The control signals instruct the external device to modify the environment inside the vault. The sensor may be positioned inside an enclosure, which is inside a housing. An air moving device moves air into or out of the enclosure thereby drawing air from the vault into the enclosure before the sensor monitors the parameter. A heat generating component may be positioned inside the housing and when generating heat prevents moisture from condensing therein. The system may include a power unit that draws power from a power source inside the vault.

Provided are an underground installation support device improving installation workability of a support member supporting an underground installation and a method of manufacturing the support device. A support device 100 according to the disclosure is a support device 100 supporting an underground installation (a communication cable 700) and including a vertical frame member 20 that extends in a substantially vertical direction, lateral frame members 30A and 30B that are attached to the vertical frame member 20 and extend in a substantially horizontal direction, and an installation support member 40 that is attached to the vertical frame member 20 and the support device is disposed on a bottom portion (a bottom wall 505) of an underground cavity (a manhole 500).

Provided are an underground installation support device improving installation workability of a support member supporting an underground installation and a method of manufacturing the support device. A support device 100 according to the disclosure is a support device 100 supporting an underground installation (a communication cable 700) and including a vertical frame member 20 that extends in a substantially vertical direction, lateral frame members 30A and 30B that are attached to the vertical frame member 20 and extend in a substantially horizontal direction, and an installation support member 40 that is attached to the vertical frame member 20 and the support device is disposed on a bottom portion (a bottom wall 505) of an underground cavity (a manhole 500).

A system for detecting an intrusion of at least one of a monitoring fiber and a detector comprises a sensor having a closure monitor and an intrusion monitor, the closure monitor including a signal generator and at least one detector attached to the monitoring fiber. The signal generator transmits signal light such that the monitoring fiber receives the transmitted signal light and reflects a portion of the signal light via the at least one detector to the closure monitor and transmits a non-reflected portion of the signal light. The intrusion monitor receives the transmitted non-reflected portion of the signal light, and monitors the non-reflected portion of the signal light to detect transient changes in the non-reflected portion of the signal light indicative of at least one of a vibration, a motion and a handling of at least one of the monitoring fiber and the at least one detector.

A system for detecting an intrusion of at least one of a monitoring fiber and a detector comprises a sensor having a closure monitor and an intrusion monitor, the closure monitor including a signal generator and at least one detector attached to the monitoring fiber. The signal generator transmits signal light such that the monitoring fiber receives the transmitted signal light and reflects a portion of the signal light via the at least one detector to the closure monitor and transmits a non-reflected portion of the signal light. The intrusion monitor receives the transmitted non-reflected portion of the signal light, and monitors the non-reflected portion of the signal light to detect transient changes in the non-reflected portion of the signal light indicative of at least one of a vibration, a motion and a handling of at least one of the monitoring fiber and the at least one detector.

A pit and an extension, each having flanges extending perpendicular to an axis of the pit and extension. The pit includes holes extending outwardly in the wall of the pit, preferably these holes are located at one end of the pit. Surfaces of the flanges are configured to mate together and clips secure the flanges together to inhibit movement apart of the pit and extension along the axis. In certain embodiments, the extension includes support ribs which may be both interior and exterior and the extension narrows from its flange towards an opposite end thereof.

A method for use with an underground network that includes a plurality of locations. The method includes receiving sensor data from at least one sensor located at a first of the plurality of locations and determining the sensor data indicates that a fire is in progress. The method includes identifying one or more of the locations as one or more potential combustion locations and assigning an estimate of a probability to each of the potential combustion location(s). The estimate estimates a likelihood that the potential combustion location is an actual combustion source. The method may include displaying the estimate of the probability assigned to each of the one or more potential combustion locations.

A method for use with an underground network that includes a plurality of locations. The method includes receiving sensor data from at least one sensor located at a first of the plurality of locations and determining the sensor data indicates that a fire is in progress. The method includes identifying one or more of the locations as one or more potential combustion locations and assigning an estimate of a probability to each of the potential combustion location(s). The estimate estimates a likelihood that the potential combustion location is an actual combustion source. The method may include displaying the estimate of the probability assigned to each of the one or more potential combustion locations.

The method of repairing a manhole begins with assembling concrete forms above ground to correspond to the shape of the manhole wall. Then, a plastic liner sheet is wrapped around the assembled forms and the seams are welded. The forming sections are then removed, and the liner is placed in the manhole. An annular space exists between the liner and the manhole wall. The forming sections are re-assembled inside the liner. Concrete is then poured into the annular space and allowed to cure. The forming sections are removed, leaving the liner anchored in a new monolithic concrete wall fully engaging the old manhole wall.