Black Box Fast Ethernet Extreme Temperature Switch - (2) 10/100-Mbps Copper RJ45, (1) 100-Mbps Multimode Fiber, 1300nm, 2km, ST, 24V DC-Power, DIN Rail - 2 x RJ-45 , 1 x ST - 10/100Base-TX, 100Base-X - Rack-mountable

BLACK BOX Extreme Media Converter Switch do more than just adapt from one cable type to another. They're true Ethernet switches and behave like switches within your Ethernet network. This means you can connect them together indefinitely without worrying about interrepeater links. Each Media Converter Switch features non-blocking switching architecture with a 2K MAC address table. The 128K buffer memory makes it easy to interconnect 10- and 100-Mbps devices.