The Remote Radio Head (RRH) architecture consists of a baseband unit (BBU) and a remote radio unit (RRU). Both the BBU and RRU are connected using fiber optic cables to transport digital data and control information. The base station can be divided into two modules: the RRU for transmitting signals and the BBU for processing signals. It also provides checklists as reference. In this document, eRRU3232 is used as an example. Difference in installation and operation of other eRRU products are also described.