... ODMOEM and ODM order is optional.We provide SPD-RS485-D-20-131S according to your requirements, and customize ... ParameterSymbol1SOPTO S= SOPTO PD = PDH Fiber Multiplexer2RS485 PortsRS485=RS485 Ports3Fiber module typeD=Dual Fiber4Distance20=20km5Wavelength13=1310nm6Fiber Ports1=1 Fiber ... VIP customers. Sopto is your reliable supplier of RS485 Fiber Modem, SPD-RS485-D-20-131S: Single Mode, Dual Fiber, ...