IDS-305F-CSS20D Industrial Managed Switch, 5 ports: 4 x 10/100/1000Base-T Base-T RJ-45 ports and 1 x 100Base-BX, 1550nm TX / 1310nm RX single strand single mode port with simplex (BIDI) SC connector [ 20km/12.4 miles ]. -10 to 60C operating temperature. PRO software feature set.