The "/" indicates the cross-sectional process of the fiber optic connector, that is, the grinding method.
PC is most widely used in the equipment of telecommunications operators, with a flat connector cross-section.
"SC" indicates that the tail fiber connector model is an SC connector. SC connectors are generally used for the side light interface of transmission equipment in the industry. SC connectors are made of engineering plastics and have the advantages of high temperature resistance and low oxidation resistance; ODF side optical interfaces generally use FC connectors. FC is a metal connector, but ODF does not have high temperature problems. At the same time, metal connectors can be plugged and unplugged more times than plastic, and maintaining ODF tail fibers is more important than optical board tail fibers. Other common joint models are: ST, DIN, FDDI.
"PC" refers to the cross-sectional process of fiber optic connectors, and PC is the most common. The APC model was widely used in broadcasting and early CATVs. The tail fiber head adopts an end face with an inclination angle (8 degrees), which is generally not visible and can improve the quality of the TV signal. The main reason is that the TV signal is modulated by analog light. When the coupling surface of the joint is vertical, the reflected light returns along the original path. Due to the uneven distribution of fiber refractive index, it will return to the coupling surface again. Although the energy is very small at this time, the analog signal cannot completely eliminate noise, so it is equivalent to adding a weak signal with time delay on top of the original clear signal. Appearing on the screen is ghosting. The inclination angle of the tail fiber headband can prevent the reflected light from returning along the original path. Generally, this problem does not exist in digital signals.
There is also a type of "UPC" process, which has lower attenuation than PC. Generally, for equipment with special requirements, the flange is usually FC/UPC. Foreign manufacturers use FC/UPC for internal jumpers in ODF racks to improve the performance of ODF equipment.