A multimode fiber optic patch cable is a fiber optic cable used to connect multimode fiber optic devices, usually consisting of two multimode fiber optic connectors and a section of multimode fiber optic cable. It has a large fiber core diameter, usually 50um or 62.5um, which can support lower bandwidth and shorter transmission distance, and is usually used for short distance, low speed and low bandwidth optical communication applications. The production of multimode fiber optic patch cords requires high precision fiber optic fusion splicing technology and optical testing technology to ensure the transmission quality and stability of optical signals.