ISM321B-20 is an industrial WDM SFP Module introduced for extending transfer distance. Attached to our industrial switches, ISM321B-20 can extend the distance to 20km with one single fiber. Users can choose whether and which items to use the fiber modules according to the demand in order to lower cost.
*Note: Use ISM321A-20 & ISM321B-20 together for fast and reliable connectivity.