Huawei RRU Overview 

 RRU Introduction As a radio frequency (RF) module in a distributed base station, the RRU modulates and demodulates baseband and RF signals, processes data, and combines and divides baseband or RF signals

 For details about the functions, ports, indicators, and power cable specifications of an RRU, see RRU hardware description of the corresponding model

For the mapping between the RRUs and cabinets, see the section related to cabinet applications supported by the corresponding base station in 3900 & 5900 Series Base Station Hardware Description 

For the upper-level circuit breakers and power cables of the RRUs, see the section related to configurations of upper-level circuit breakers and power cables in the corresponding base station in 3900 & 5900 Series Base Station Hardware Description.