CXR Larus XM-MBASE-3TTX-2CBO Base Ethernet bridge unit with 3x Ethernet ports, switch with 2x Combo 10/100/1000 and 1000FX with SFP slot, 1 to 16x E1/T1 inverse multiplexer, 19'' 1U, 2 slots for power, delivered without power and E1 / T1 modules