Advanced technologies like Distributed Acoustic Sensing (DAS), Distributed Temperature Sensing (DTS) and Distributed Temperature & Strain Sensing (DTSS) play a key role in thermal profiling, capacity optimization, enhanced early fault detection and location, and improved. Advanced technologies like Distributed Acoustic Sensing (DAS), Distributed Temperature Sensing (DTS) and Distributed Temperature & Strain Sensing (DTSS) play a key role in thermal profiling, capacity optimization, enhanced early fault detection and location, and improved. Underground cable monitoring is crucial for maintaining reliability and preventing failures caused by environmental and mechanical threats. By detecting issues early, it enables proactive maintenance, reducing the risk of service disruptions and costly repairs. Advanced technologies like. The status of an optic–electric composite high-voltage submarine cable (referred to as submarine cable) can be monitored based on optical fiber-distributed sensing technology, and at the same time, no additional sensor is needed in the monitoring system. Currently, this technology is widely used in. For onshore applications, monitoring the temperature of your cables is crucial. External factors, like a farmer placing a haystack over the cable or road repaving, can cause a cable's temperature to rise, potentially leading to overheating. Real time temperature measurements through the optical fibers can be done by using a Distributed Temperature Sensing (DTS) unit.