CXR Larus MX-E3T3-F-16RJ Fiber optic multplexer 1U 19 E3/T3 Multiplexer + Ethernet over fiber optic, dual SFP (1+1) w/o SFP module, carry 16x E1/T1 RJ45 100/120 Ohms and a 3 ports 10/100BaseT Ethernet at 45 Mbps , 2 slots for power supply modules