Breakout fiber patch cord is used to split 12-core MTP connectors terminated on trunk cable into simplex or duplex connectors. MPO/MTP connector is connected with trunk cable, while simplex or duplex connector on the other side can provide a different fan-out length which is convenient for device connection. Can also say this breakout patch cord is a fiber optic cable capped at either end with connectors that allow it to be rapidly and conveniently connected to CATV, an optical switch, or other telecommunication equipment. Having a thick layer of protection, it is used to connect the optical transmitter, receiver, and the terminal box. This is known as “interconnect-style cabling”.