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 ... Main FeaturesHigh Integration and Flexible Configuration l Integrated fiber/electrical equipmentl 4E1 interfaces, 4 10/100M ... , busy tone, and ring signal.Uplink port: Optical transmission distance is more than 30KM without repeat. ...