What equipment can be used to identify problems in the fiber-optic network?

The optical time domain reflectometer (OTDR) is the most effective tool for identifying issues within a fiber-optic network. This specialized equipment works by sending a series of light pulses down the optical fiber and measuring the light that is reflected back. By analyzing the time it takes for reflections to return and their intensity, the OTDR can pinpoint the exact locations of faults, breaks, or other irregularities along the fiber line. Moreover, it provides crucial data about the fiber's overall performance, including loss rates and splice points, making it an invaluable tool for diagnosing and troubleshooting fiber-optic systems.

In contrast, while a multi-meter measures electrical properties such as voltage, current, and resistance, it is not designed for optical signals and therefore lacks the capability to assess fiber optics properly. A signal generator can produce electrical signals or test signals but does not provide insights into the integrity or performance of an optical network. Similarly, a power meter can measure optical power levels, which is useful for certain aspects of maintenance, but it does not offer the comprehensive diagnostic capabilities of an OTDR concerning location and type of faults in the fiber-optic medium.