1.25G SFP BiDi module fiber optical transceiver emerges as a top tier solution to meet these demands. The transceiver operates with a TX wavelength of 1310nm and an RX wavelength of 1550nm, providing an long transmission distance of up to 20km. This long distance capability is crucial for various applications. For instance, in large - scale enterprise networks that span across multiple buildings or even different geographical locations, the ability to transmit data over such a distance without significant signal degradation.