The 2 Rack Unit (RU) version of the ULH system is an economical companion to the 9 RU, 16 Input/Output (I/O) slot shelf. This compact shelf has 4 I/O card slots and accommodates any combination of 4 ULH I/O blades including transponders (2.5G multi-rate, 10G and 40G) and optical amplifiers (pre-amplifiers, booster amplifiers, Raman signal amplifiers and optical pumps for EDFA-based Remote Optically Pumped Amplifers.)
The shelf is equipped with two load-sharing power supplies and a control unit (CU). The CU provides status monitoring, control and adjustment of the installed blades and hosts the SNMP Management Information Base (MIB) for the system.