Amazon.com: A Pair of 1.25G Gigabit Ethernet Fiber Media Converters with SFP LC Single Core Transceiver Module, Single-Mode LC, SMF RJ45 to SFP Slot up to 30KM, 10/100/1000Base-Tx to 1000Base-SX (2 Pack) :
1.25Gbps Optical SFP Transceiver,1310nm 20KM, Single Mode, Auto Sensin – UltraPoE
How Many Types of SFP Transceivers Do You Know? | FS Community