ZXSDR B8300 High-capacity Multimode BBU The ZXSDR B8300 is a high-capacity multimode Base Band Unit (BBU) based on the Software Defined Radio (SDR) platform, which supports multiple systems including TD-SCDMA, GSM, LTE and etc. The ZXSDR B8300 and ZTE RRU series constitute a complete eNodeB. Compared with traditional networking solutions, the BBU + RRU networking solution not only avoids the dependence on equipment rooms and reduces the difficulty in network deployment, but also effectively accelerates network construction, meeting operators’ requirements for rapid and low-cost network construction. DC power supply distribution unit DCPD7, installed in the cabinet and connected between - 48 V DC power supply and equipment, is a class C drawer type surge protective power supply cabinet. It is suitable to indoor low-voltage DC power distribution system for protection of equipment from surge and transient over-voltage caused by outside environment (such as lightning, EMI, switching effects of the system) or internal environment (power on and off, startup or shut off of inductance and capacitance loads, etc.)