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