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Information processing system has developed rapidly in recent years, demands for information transfer concerning its fast, convenience, safety and reliability are much higher. Network established by many companies is supposed to internally adapt to the different network equipment, host, terminals, PC and peripheral devices, which can constitute a flexible topology and has enough system expansion capability. By connecting national public network with external information source, it can form an omni-directional and multi-channel access to information system. In a word, information processing system should not only meet the needs of the current information processing, but also fully consider the future development trend of information system.
Generic cabling system is constituted by following five subsystems:
1）Work Area Subsystem: Work area subsystem is an area covering from outlet to user terminal. Standardize all the media interface (DB15, DB9, DB25, coaxial, etc.) into modular outlet(T568A, T568B) or optical fiber outlet. The purpose is to realize the connection between work area terminal equipment and horizontal subsystem, formed by cables that connect terminal equipment with information outlet. Commonly-used devices in work area are a computer, network Hub (Hub), telephone, alarm sensor, cameras, monitors, audio, etc.
2）Horizontal Subsystem: Its purpose is to connect information outlet and management subsystem(wiring closet). Horizontal subsystem leads user’ work area to management subsystem and offers users an information export that meets international standards, satisfies demands of voice and high-speed data transmission requirements. In this system, common transmission media are 4 pairs of UTP (Unshielded Twisted Paired), which can support most modern communication devices.
Horizontal subsystem exists between horizontal connection and outlet.
Horizontal connection---------horizontal cables---------outlet
Horizontal cable can be divided into UTP (Unshielded Twisted Paired), STP(shielded Twisted Paired) and optical fiber.
3）Backbone Subsystem: Backbone subsystem is required for connecting computer equipment, private branch exchange, control center and each management subsystem, it is the route of building cables. The subsystem usually exists between two units, especially in the public system of central point, it offers several line facilities. The commonly-used media are twisted pair cables and optical fiber cables.
4）Closet: Closet is the room located at each floor. It stores facilities and distributing frame. The subsystem is composed of patch cord and joint distributing frame. The closet connects with other subsystems. Patch cord and joint distributing frame can locate or relocate communication circuit into different parts of the building, making it easier to manage communication circuit and plug into mobile terminal device.
5）Equipment room: The equipment room serves for whole cabling system. It stores equipment and distributing frame of cabling system.
This subsystem is composed of cables, connector and related support hardware, it is supposed to inter-connect weak current apparatus, such as computer, PBX, cameras, monitors, and then link them to the main distributing frame.