3G(TD-SCDM)A indoor distribution system mainly adopted as a basestation with base band unit (BBU) and radio remote unit (RRU). With the introduction of multiband RRU, indoor distribution systems need a large number of fibre resources. Sufficient fibre resources should be distrbuted and routed at one time in during the installation process. To meet the demands of various equipment interface from potential manufactures, pre-distributed multi-fibres should be terminated using the tower-mounted distribution box. It implements such functions as the inlet, fixation, and stripping protection for subscriber cables, splicing, protection, storage and management for optical fibres.
It is used for connection from fibre to tower or from fibre to building, for connecting RRU and BBU. It is installed in the buliding or OSP near the antenna.