The ProLabs 100-01668-C Calix 1000BASE-BX SFP SMF Optical LC 20KM Transceiver 663856 is a high-quality networking component designed for enterprise use. Compatible with Calix equipment, this transceiver features a SFP network port and a 20km transmission distance. Part of the Enterprise product line by ProLabs, this optical transceiver ensures reliable and efficient data transfer for a variety of networking needs. Ideal for businesses looking to enhance their network infrastructure with a trusted and compatible component, the ProLabs 100-01668-C is a solid choice for boosting connectivity and performance.