The types of cables used in the industry include: permanently installed fiber optic cables, logging cables (both wireline and slickline) and surface cables. Depending on engineering. ture or strain) that they are measuring. These structures will be highlighted. The Fiber Optic Association, Inc. (FOA) was founded in 1995 to help develop the workforce to build the fiber optic networks to support a rapid expansion in communications and the Internet. The charter of the FOA was to promote professionalism in fiber optics through education, certification, and. Optical Fibre cables are being laid in large quantity for transportation of signals in long distance and in junction network. Most communications conduits can be fitted with three or four sub-ducts. Sub-ducts are often referred to as innerducts.