Carrier-grade fiber optic patch cords are relatively much better than network-grade fiber optic patch cords, because they have low attenuation and are less prone to data loss. The wrong choice — whether it's an underperforming multimode grade or an unnecessarily expensive singlemode run — can either cripple your network's reliability or. Fiber patch cable are used as jumpers from equipment to fiber optic cabling links. It has a thicker protective layer and is generally used for the connection between optical transceivers and terminal boxes. It is used in some fields such as optical fiber communication systems, optical fiber access. Essentially, these are fiber optic cables capped at either end with connectors that allow them to be quickly connected or disconnected from an optical switch, a computer network, or other telecommunication equipment.