Fiber optic patch cord can be divided into single-mode and multi-mode patch cord according to the different transmission media; according to the structure of the connector, it can be divided into: FC type, SC type, ST type, LC type, MTRJ type, MPO type, MU type, SMA type, FDDI type, E2000 type, DIN4 type, D4 type, etc. The more common fiber optic patch cord can also be divided into FC-FC, FC-SC, FC-LC, FC-ST, SC-SC, SC-ST, etc.