... port, high adaptability.>Single or multi mode optional, FC/SC/ST optional.>Operating Wavelength:1310nm/1550nm(single mode)> ... SpecificationWavelengthConnectorTransmissiondistanceBT-MS5F-2A/BMultimode optic to RS485,single fiber, FC port, 2km1310/1550FC2BT-MS2F-2A/BMultimode optic to RS232, ... single fiber, FC port, 2kmBT-MS542F-20A/BMultimode optic to RS/485 ...