The invention relates to a switch that can be checked, which comprises a housing, an optical conductor (10) arranged in the housing, a deflecting device (16) for the optical conductor, which deflecting device is arranged in the housing, and a triggering device, which initiates a switching process of the switch and actuates the deflecting device at least at times. The deflecting device is designed in such a way that, when the deflecting device is actuated, the optical conductor is deflected in a defined manner such that the bending radius of the optical conductor changes in a defined manner. According to the invention, the switch that can be checked also has a restoring mechanism (34) for the deflecting device, and the restoring mechanism has a restoring delay, which returns the deflecting device to the original position of the deflecting device with a defined delay after the triggering device has been restored.

A secured cable system for protecting an inner cable is disclosed. The secured cable system includes a cable security system having a first security tape including a tape portion upon which a plurality of detection lines are arranged. The security system may also include a detection box in electrical or optical communication with each of the detection lines in the first security tape. In one embodiment, the security tape is spiral wrapped about the inner cable in a first direction along a length of the inner cable, the security tape being overlapped upon itself at a predetermined overlap factor. The secured cable system may also include a second security tape including a tape portion upon which a plurality of detection lines are arranged in a pattern wherein the second security tape is wrapped about the first security tape in a second direction opposite the first direction.

A fiber optic network has alarmed fiber optic lines in the cables connecting a secured junction box to plural user lock boxes. An outgoing alarm line and return alarm line in each cable connect the junction box to each user box. The outgoing alarm line is looped to the return alarm line inside the user lock box. The return alarm line is looped to the outgoing alarm line of a different cable inside the junction box to interconnect a plurality of alarm lines passing through a plurality of user boxes. A detector detects an alarm signal in the connected alarm lines to trigger an intrusion alarm.

A fiber management tray (20) is disclosed. The fiber management tray (20) includes a tray body (22) defining a fiber storage region (24) for storing excess optical fiber length (26). The tray body (22) also includes a splice mount (28) for mounting at least one optical splice (30). The fiber management tray (20) includes a restricted access region (32) and an unrestricted access region (34) on the tray body (22). The splice mount (28) and the fiber storage region (24) are provided at the unrestricted access region (34), and an optical splitter component (36) is provided at the restricted access region (32).

A strand mounted terminal includes a terminal housing having a base portion and a cover portion and configured to receive fiber optic components for performing the various tasks required by the terminal. The base portion defines part of the interior of the terminal housing and includes some of the fiber optic components, such as an adapter housing, and the cover portion defines part of the interior of the terminal housing and also includes fiber optic components, such as a splitter housing. The cover portion is configured to be connected to the base portion and moveable between an opened position in which the interior of the terminal housing is accessible, and a closed position in which the interior of the terminal housing is inaccessible. A method of configuring a strand mounted terminal is also disclosed.

A fiber optic cable including an inner guard layer surrounding a core containing at least one optical fiber; and an outer guard layer surrounding the inner guard layer; wherein the inner guard layer includes at least one metal tube with at least one optical fiber inside the tube; and wherein the outer guard layer includes at least one metal tube with at least one optical fiber inside the tube.

In some embodiments, optical fiber monitoring may be facilitated. In some embodiments, monitoring of an optical fiber may be performed via a detection system to detect changes in the optical fiber that are indicative of one or more events. During the monitoring, a monitor signal may be transmitted along the optical fiber via a light source, where the monitor signal is received by the detection system as light from the optical fiber. While the detection system continues to receive light from the optical fiber in connection with the transmitting of the monitor signal, a test disturbance event may be caused to occur at a predetermined location along the optical fiber via a device at the predetermined location. In response to a failure of the detection system to detect test-related changes in the optical fiber caused by the test disturbance event, a notification indicating an issue may be generated.

In some embodiments, optical fiber monitoring may be facilitated. In some embodiments, monitoring of an optical fiber may be performed via a detection system to detect changes in the optical fiber that are indicative of one or more events. During the monitoring, a monitor signal may be transmitted along the optical fiber via a light source, where the monitor signal is received by the detection system as light from the optical fiber. While the detection system continues to receive light from the optical fiber in connection with the transmitting of the monitor signal, a test disturbance event may be caused to occur at a predetermined location along the optical fiber via a device at the predetermined location. In response to a failure of the detection system to detect test-related changes in the optical fiber caused by the test disturbance event, a notification indicating an issue may be generated.