MiniMc-Gigabit 855-10731 convert 1000Base-T twisted pair to 1000Base-LX fiber optics for distances up to 10 km.IMC Networks" MiniMc 855-10731 is the smallest media converter in the industry which has both data connections on the same side of the unit, and MiniMc is a fraction of the cost of other alternatives. 855-10731 is RoHS Complaint.