... Choice ST, FC, SC connector4.E1(G.703)interface support 120ohm(RJ-45) and 75ohm(BNC)5.Multi-mode 2KM, signal-mode ... 20KMCommunication Interface standardAccord ITU-T G.703 protocolE1 signal (BNC) IN, OUT E1 signal(RJ-45) T+, T-, R+, R-, GND Optic ... WorkingAsynchronism, transparent transferE1port rate 2.048Mbps Optic port rate8.192Mbps E1 port coding HDB3 Optic port coding CMI Optic fiber wavelengthMulti ...