Included the main cross-connect (MC) distribution equipment, the main distribution area is the central distribution point of the structured wiring distribution system of the data center. When the equipment is directly connected to the main distribution area, the main distribution area can include horizontal cross-connect (HC) wiring equipment too. The main distribution area can be supported by routers, core switches, core storage area network switching equipment and PBX equipment at the core of the data center network to serve the middle distribution area, horizontal distribution and equipment distribution areas of one or more data centers at different locations, as well as telecommunications rooms outside each data center, and to provide services and support for office areas, operation centers, and other external support areas. Sometimes the communication equipment (such as communication transmission facilities) connected to the telecommunications business operator is also placed in this area to avoid exceeding the rated transmission distance due to the cable. The main distribution area is located inside the computer room. To improve safety, it can be set in a dedicated space in the computer room. Every data center should have at least one main distribution area.