1.4E1 PDH fiber optical Equipment 2.1+1 optical interfaces (FC) 3.with 48Vdc ... has 4 E1 interfaces (BNC, 75OHM), 1+1 optical interfaces (FC), single mode, double core, and ... : Optical transmission distance is more than 30KM without repeat. E1 interface : 4 E1s, 75Ω BNC connector. ... Full duplex self adaptationl Frame Size: 64~1536 bytesl Connector: RJ45Environmental Requirements l Power supply: -48 VDC ...