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Fiber optic patch cord is a fiber cable assembly that connects two ends terminated and ready for installation. Common types of fiber optic patch cord, include FC,LC,MT-RJ,MU,SC, and ST. Fiber applications for fiber optic connectors can be single mode or multi mode. Fiber types for fiber optic patch cord can include simplex,duplex,and multi-fiber.Maximum cable diameter and insertion loss are also important parameters to consider. Insertion loss is a measure of the attenuation of a device by determining the output of a system before and after the device is inserted into the system. For example, a patch cord causes insertion loss across the interconnection(in comparison to a continuous cable with no interconnection).