1. PSU – power supply unit(24V/700W), gives power for all units in the RBS
2. ECU – energy control unit. It is supervisor for PSUs and funs. Also it is connected with two temperature sensors and humidity sensor.
3. TRU – transciever unit. RF part of RBS.
4. CDU – combining unit. It is connection between TRU and antennas system.
5. DXU – distribution and exchange unit. It is brain of RBS and has connections to all units. It has connection points for E1 and OMT.