CXR Larus FO-E3T3-SLCR E3/T3 FO single-mode modem 1310 nm SC/PC, LED for 30 km, Modes: G703 transparent E3 34 Mbps and T3 45 Mbps Ethernet bridge 10/100BaseT, or G703 transparent T3 45 Mbps and E3 34 Mbps Ethernet bridge 10/100BaseT, or Ethernet bridge 10/100BaseT toward opti