Generic cabling
"Generic cabling system is a set of cabling system specially designed to meet the development needs. For a modern building, it is just like the nerves in the body. It adopts a series of high-quality standard materials, integrates voice, data, image and part of control signal system with a unified transmission medium in a modular way, integrates them into a set of standard wiring system through unified planning and design, and organically connects the three subsystems of modern architecture It provides a physical medium for the system integration of modern architecture.
It can be said that the success of structured cabling system is directly related to the success or failure of modern buildings, so it is very important to choose a high-quality generic cabling system.
Generic cabling system for building and campus (GCS) is the transmission network in buildings or buildings, and is the "information highway" in buildings. It not only connects the voice and data communication equipment, switching equipment and other information management systems with each other, but also connects these equipment with the external communication network. It includes all the cables and associated wiring components between the connection point on the line from the building to the external network or telephone office and the voice and data terminals in the working area.
Generic cabling system (PDS) is the infrastructure of digital information system for intelligent office construction. It is a structured cabling system that unifies the planning and design of all voice, data and other systems. It provides information and intelligent material medium for office, and supports the comprehensive application of voice, data, graphics and multimedia in the future. "
| Generic cabling solutions |
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| Generic cabling is mainly composed of the following six parts:
Management subsystem:
It mainly refers to the telephone room of voice system and the network equipment room (or network center) of data system. The subsystem is mainly composed of distribution frame and cables connecting distribution frame and equipment.
Horizontal Subsystem：
It refers to the distribution frame of all floors except the equipment room.
Riser Backbone Subsystem：
The vertical trunk subsystem provides cables in the vertical direction to form communication channels between floors and outside.
Horizontal subsystem:
Unshielded twisted pair (UTP) is usually used to extend the vertical trunk line to the user's work area. When high-speed application is required, the horizontal trunk line can also use optical cable.
Workspace subsystem:
It is composed of information socket and connecting line to user equipment.
Building group subsystem:
It refers to the extension of cables from one building to another, including cables, optical cables and some electrical protection equipment.
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| Design of each subsystem (1) Design of work area subsystem
Work area subsystem refers to the design of user's actual use area.
The information socket panel has identification, indicating the type of socket and its area by color code and number.
There are three types of information exits in the work area: wall type, floor type and desktop type.
The wall type panel is installed 30cm above the ground, parallel to other panels. It is installed on the desktop 10 cm away from the ground. |  | | The connection example of the British panel fixed on the 86 bottom box terminal < br > the wall mounted information box shown in the left figure is used when it is inconvenient to use the above bottom box, or the ground mounted integrated junction box used in the elevated platform environment.
|  | (2) Design of horizontal subsystem
The horizontal wiring subsystem is composed of cables from each management subsystem of the building to each working area subsystem, that is, the horizontal cables from the weak current room of each floor to each information point.
In order to meet the needs of high-speed data transmission and video application, four pairs of unshielded twisted pairs are selected, which can not only meet the current needs, but also meet the needs of future development.
In order to avoid accidental damage, and to achieve safety and beauty, horizontal cables are laid in or use embedded concealed pipes and outlet boxes.
Installation of trunking and pipes
Trunking: we all use galvanized trunking, according to the number of different specifications of trunking, all installed in the corridor, convenient for future maintenance and repair. We all use angle steel as hanging bar and apply antirust paint. From the trunking to each location, we use 6 or 4 PVC pipes. Equipotential cables shall be installed at the joints of all trunking.
| (3) Design of equipment room subsystem
The management subsystem is also known as the telecommunication subsystem or the weak current subsystem. It connects the horizontal wiring subsystem and the trunk subsystem. It is a key link in the wiring link.
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(4) Vertical trunk subsystem
The vertical or building group subsystem generally adopts optical fiber. According to the different quantity, various specifications and different number of cores are adopted. Optical fiber connectors are mainly st, SC, MT-RJ and other different types.
MT-RJ type optical fiber connector st type optical fiber connector SC type optical fiber connector
Because the voice terminal must be directly connected to the voice master equipment (telephone switchboard), it can not use optical fiber, but must use large pair twisted pair as the backbone, which can be classified into three or five categories.
|  | At present, most voice devices require at least one twisted pair to connect each voice terminal, but many advanced voice systems have adopted two or more twisted pairs to connect voice terminals. Therefore, no matter how many pairs of wires are used to connect the telephone, at least two pairs of twisted pairs are used to support one voice terminal on the trunk. To avoid the problem of insufficient backbone pair when upgrading the telephone system in the future.
The connection between optical cables must be made with special optical cable connection box or distribution frame. To protect the optical cable from being damaged by external impact. The optical cable distribution frame is as follows:
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