Fiber-Optic Intrusion Detection Systems (FOIDS) are often used in physical fenceline security [0], with permanent installations using hardened conduit or improm

Fiber-Optic Intrusion Detection Systems (FOIDS) are often used in physical fenceline security [0], with permanent installations using hardened conduit or impromptu setups of kevlar-jacketed fiber, zip-ties and concertina wire. It's only natural that longer runs of fiber can be used for similar vibration measurements. [0] Examples at https://fibersensys.com/product/fd322 https://fibersensys.com/product/fd322 and http://senstar.com/products/fiber-optic/ http://senstar.com/products/fiber-optic/