Trunk cable

Optical fiber trunk cable provides a connection between distribution panels and is used between floors and between buildings. It may also be used on the same floor where the number and complexity of connections require the use of multiple jumper cables. Such cabling is frequently referred to as backbone cabling.

Optical fiber trunk cables typically contain from 12 to 144 fibers (6 to 72 pairs) with a strengthening material and an outer jacket. The jacket material may be composed of metal sheathing, fabric, or any one of several man-made materials, depending on the degree of environmental protection required. The physical configuration of the trunk cables will vary depending on user requirements, environmental conditions, and the type of installation required (for example, aerial or underground).