TP-LINK SM321B SFP MODULE, SINGLE MODE, 1000BASE-BX BI-DIRECTIONAL, 10KM, 3YR

Up to 20 km transmission distance with 9/125 μm SMF (Single-Mode Fiber) Bidirectional WDM communication on a single fiber Compatible with Small Form Pluggable Multi-Source Agreement (SFP-MSA) Supports Digital Diagnostic Monitoring (DDM) Hot-swappable module design Work with TL-SM321A as a pair