CXR Larus FO-4E1T1R-2TTX-U FO modem 4x E1/T1 G703, RJ45 120/100 Ohms, switch 2x 10/100BaseT trunk of 45 Mbps, 2 slots for SFP modules, 1+1 protection, w/o mudule, management over console port or Ethernet in Telnet/SNMP. Metal box, AC internal power supply.