Fiber optic jumpers (also known as fiber optic connectors) refer to optical cables with connector plugs installed at both ends to achieve active connection of the optical path. In addition, the tail fiber mentioned is a fiber optic cable with only one end equipped with a connector plug. OM3 and OM4 are standards that represent the level of multimode fiber, so OM4 fiber patch cords are a better development direction for OM3 Fiber Patch Cords.

OM3 is a 50um core diameter multimode fiber optimized by 850nm laser. In 10Gb/s Ethernet using 850nm VCSEL, the transmission distance of OM3 fiber can reach 300m, and 40Gb/s Ethernet can transmit 100m.
link:https://www.fibertelcom.com/fiber-patch-cords/om3-fiber-patch-cords.html