So each terminal will use two cores at most. If you want to consider the cost, you can use 1-2 cores for the entire line redundancy. Made from either high-quality glass or plastic, the core plays a critical role in determining the cable's performance. The total number of cores for a 1pc fiber patch cable is calculated as the number of. Fiber optic cables are the backbone of modern internet infrastructure, but choosing the right one can be tricky. This post will guide you through understanding fiber optic cores and selecting the perfect cable for. According to the IBDN standard, we generally recommend using 12 cores for the communication room in each building, and 24 cores for the building room. Common fiber cores include 1 core, 2 cores, 6 cores, 8 cores, etc.