... optical port,also it can accomplish the conversion between duplex Bi-Di optical fiber port,support 12Mbps Optical port. The device ... 20Km. Fiber interface type:ST. Optic fiber module:duplex or Bi-Di. Data rate:0~12M Relay Contact rating:DC30V@1A ... mode fiber 20Km,Duplex,ST connector.PcsCi-sm11-2Duplex to Bi-Di converter,Mutimode fiber 2Km,Single mode fiber 20Km,ST ...