SM321A UN Omada 1000Base-BX WDM Bi-Directional SFP Module

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A 1000Base-BX WDM bi-directional SFP module from TP-Link's Omada line — unlike ordinary SFP modules, it sends and receives on different wavelengths over a single fibre strand (instead of two separate strands), reducing fibre costs. As the A side, it must work as a pair with a matching B-side module (SM321B) at the other end. An affordable solution for projects where fibre infrastructure is limited but a 1 Gbit/s link between buildings is needed.