Fiber optic patch cords are used to make patch cords from equipment to fiber optic cabling links. With a thicker protective layer, it is generally used in the connection between the optical transceiver and the terminal box, and is used in some fields such as optical fiber communication systems, optical fiber access networks, optical fiber data transmission, and local area networks.

Optical fiber jumpers (also known as optical fiber connectors) refer to the connector plugs installed at both ends of the optical cable to realize the active connection of the optical path; one end with a plug is called a pigtail. It connects the two ends of the fiber so that the light energy output by the transmitting fiber can be coupled to the receiving fiber to the maximum extent, and the impact on the system due to its involvement in the optical link is minimized.

There are also many kinds of optical fiber jumpers (also known as optical fiber connectors), that is, optical fiber connectors connected to optical modules, and they cannot be used with each other. The SFP module is connected to the LC fiber optic connector, while the GBIC is connected to the SC fiber optic connector. The following is a detailed description of several commonly used optical fiber connectors in network engineering:

①SC type optical fiber jumper: the connector for connecting the GBIC optical module, its shell is rectangular, and the fastening method is a plug-and-pull type, which does not need to be rotated. (Most used on router switches)

②FC type optical fiber jumper: the external strengthening method is a metal sleeve, and the fastening method is a turnbuckle. Generally used on the ODF side (the most used on the patch panel)

③LC-type fiber jumper: a connector for connecting SFP modules, it is made with a modular jack (RJ) latch mechanism that is easy to operate. (commonly used by routers)

④ST type optical fiber jumper: commonly used in optical fiber distribution frame, the outer shell is round, and the fastening method is turnbuckle. (For 10base-F connection, the connector is usually ST type. Often used in fiber optic distribution frames)