The term "6-core" refers to the number of individual optical fibers within the cable. Unlike traditional single-core or dual-core cables, a 6-core fiber optic cable provides six independent channels for data transmission. • Design engineers reserve spare fibers for potential breaks and future upgrades to the system. They come in different types, each designed for specific applications and distances. Such fibers are widely used in fiber-optic communication, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than. Fiber Optic Cables Priced Per Foot, chainflex CFLG fiber optic cable TPE 62. A tariff of 8%. Common fiber cores include 1 core, 2 cores, 6 cores, 8 cores, etc.