SFP Slot, 10/100/1000BASE-T (RJ-45) [100 m/328 ft.] to 1000BASE-X or 100BASE-X - SFP Slot (empty). Extended Temperature, terminal block power connector for external power source . Perle's Industrial Temperature Media Converters transparently connect copper to fiber in locations that are exposed to harsh extended temperatures of -40F to 167F ( -40C to 75C ).