CXR Larus FO-4E1T1R-TTX-R FO modem 4x E1/T1 G703 RJ45 120/100 Ohms, switch 10/100BaseT trunk of 45 Mbps, 2 slots for SFP module, 1+1 protection, w/o mudule, management over consol port, Ethernet or CFIP in Telnet/SNMP. Rack card for AMS4/AMS16, use 1 slot