... /125 um,62.5/125 um,100/140um;single mode 8.3/125 um,9/125um,10/125umTransmission distance: MM 2Km ... .Ci-sf110-SSingle mode fiber, transmission distance: 20KM, single fiber port, connector ST/SC/FC (optional), Rate data: 0-10M.Ci ... distance 20KM, connector ST/SC/FC, Rate data: 0-10M. RS-485/232/422 serial to Fiber Optic Converters Ci-sf120-s