The QSFP28 transceiver provides 100GBase-BX throughput up to 20km over single-mode fiber (SMF) using a wavelength of 1310nmTx/1280nmRx via an LC connector. This bidirectional unit must be used with another transceiver or network appliance of complimenting wavelengths. ZR4 BiDi, using four. Versitron's bidirectional SFP modules offer cost savings, easier management, and scalable solutions that are essential for the development and maintenance of efficient, high-performance network infrastructures.