Single mode and multimode fiber cables are quite different when it comes to size, light source, signal, and so on. So, they definitely are not interchangeable, and compatibility issues can occur when you try to connect a single mode fiber optic connector to a multimode network. A fiber jumper consists of one or more optical fibers of a certain length and the optical connectors at both ends. Comply with the following rules when. The optical module uses LED or VCSEL to drive light along the jumper to the other end, where another optical module receives the light and converts it into equivalent electrical signals. These differences determine which transceivers work with which fiber and how far signals can travel. Fiber Optic Patch Cable Overview Fiber optic patch cable, also.