Converteon AT-CM3K0S Gigabit Ethernet Rate Converter Line Card features a 10/100/1000T twisted pair port, and an optical SFP slot. The twisted pair port has an RJ-45 connector and a maximum operating distance of 100 meters (328 feet) when connected to either an Ethernet, Fast Ethernet, or Gigabit device. Depending on the model, the media and rate converter line cards can operate in multi-mode or single-mode fiber over various distances up to 80km.