Optical attached cable (OPAC) is a type of fibre-optic cable that is installed by being attached to a host conductor along overhead power lines. After pulling the cable to the top of the tower and clamping it all along its length, remove cable ties pulling sock, installation corrugated tube and plastic film on both sides, for FO trunk cables. This approach involves installing fiber-optic cables on existing utility poles, transmission lines, or other. Deploying fiber above ground on poles or towers removes the need for underground digging and is particularly useful when the ground is uneven, rocky or both. Fiber in a duct solutions have a major aesthetic. At the FOA, we're mainly concerned with communications fiber optics - telco, CATV, LAN, industrial, etc. Even within communications applications, we have applications that differ widely in usage and in.