Transmission line monitoring system testing

A system comprising:

• one or more processors and non-transitory media storing instructions that, when executed by the one or more processors, cause operations comprising:
• transmitting, via a light source, a monitor signal into one end of a fiber of a plurality of fibers of a cable;
• while a detection system continues to receive light from the fiber in connection with the transmitting of the monitor signal, causing, via one or more devices along the fiber, a test event to occur along the fiber;
• and
• generating a notification indicating an issue based on a determination that the detection system failed to detect one or more changes in the fiber caused by the test event that occurred along the fiber.

A method comprising:

• transmitting, via a light source, a monitor signal along a fiber of a cable;
• while a detection system continues to receive light from the fiber via the transmitting of the monitor signal, causing, via one or more devices along the fiber, a test event to occur along the fiber;
• determining that the detection system failed to detect one or more changes in the fiber caused by the test event that occurred along the fiber;
• and
• generating a notification indicating an issue based on the determination that the detection system failed to detect the one or more changes.