Fiber optic closure, also known as fiber optic splice sockets, is a device used to provide space and protection for fiber optic cables to be joined together. The Hong Kong Polytechnic University study, Hiding an Ear in Plain Sight, presented at this year's NDSS, an academic conference focussed on. Researchers at NDSS 2026 demonstrate a covert acoustic eavesdropping attack that transforms standard FTTH telecom fiber cables into passive, undetectable listening devices invisible to RF scanners and immune to ultrasonic jammers. However, a groundbreaking discovery reveals that these very cables can be turned into covert listening devices. In a newly published 2026 cybersecurity research paper, experts demonstrated how standard. We terminate fiber optic cable two ways - with connectors that can mate two fibers to create a temporary joint and/or connect the fiber to a piece of network gear or with splices which create a permanent joint between the two fibers. Now, it also includes new models and configurations for more flexibility to meet the complex needs of today's fiber optic networks.