The electrical interface module and optical fiber module have the following differences: ① Function difference: the role of the optical fiber SFP module is that the transmitting end converts electrical signals into optical signals, and then converts optical signals into electrical signals through optical fibers; The function of the electrical port module is to transmit electrical signals; ② Interface difference: the interface of the electrical interface module is RJ45 interface, and the interface of the optical fiber module includes LC interface, SC interface and MPO interface; ③ Difference between connecting cables: the electric interface module is usually connected with the network cable for transmission, and the optical fiber module is connected with the optical fiber jumper for transmission; ④ Difference in transmission distance: the maximum transmission distance of the electric interface module is 100M, while the transmission distance of the optical fiber  SFP module can reach more than 100KM; ⑤ Device difference: the devices of the optical fiber SFP module and the electrical interface module are different. The electrical interface module does not have a laser, but the optical fiber SFP module does.