CXR Larus FO-E3T3-M3TU E3/T3 FO multimode modem 1310nm ST, LED for 4km, Modes: G703 Clear Channel, E3 34 Mbps and T3 45 Mbps, Ethernet bridge 10/100BaseT, or G703 transparent E3/T3 34 Mbps and 45 Mbps, or Ethernet bridge 10/100BaseT toward optical G703 34/45Mbps. Metal deskt