TP-Link SM321B Single-Mode WDM SFP (Side B, up to 10 km)

SM321B is the side-B module for single-fiber runs up to 10 kilometers: it connects remote sites, branches and facilities across a city while saving fibers in the trunk cable. Used together with a side-A module. LC simplex connector, gigabit speed, compatible with TP-Link switches and other SFP-slot devices.