Campus integrated system wiring scheme
In a building, the integrated wiring system is an important component. So, how should we design a construction plan on campus?
1. The goal of the integrated wiring system:
Integrated wiring is a modular and highly flexible information transmission channel within a building or between building groups. Through it, voice equipment, data equipment, switching equipment and various control equipment can be connected with the information management system, and these equipments can also be connected with external communication networks. If the network is compared to the human body, then wiring is the nervous system of network construction. The operating condition of the network depends to a large extent on the quality of the cabling. Therefore, the planning and design of the wiring system must pursue the optimal performance at that time. First, pursue the latest standards. Construction design must be carried out in strict accordance with the international standards of ISO / IEC 11801 and ANSI EIA / TIA 568B to ensure the security and performance of the network. Second, look at long-term use. The development of technology is changing rapidly. Therefore, the integrated wiring system should adapt to the continuous development of technology. Third, the connectors must be sufficient. Except for some cables fixed in the building, the connectors must fully conform to the unified standard, which is convenient for equipment expansion. Fourth, meet diversification requirements. Once the system is implemented, the connection between the information points and the computer or computer equipment should be smoother. Fifth, it supports various data transmissions, such as Fast Ethernet, Gigabit Ethernet, Token Ring Network, FDDI, ISDN, and so on.
2. Design principles:
(1) Compatibility and comprehensiveness are better. It is to ensure the good transmission performance of the wiring system and reduce the investment cost of the campus training building.
(2) Be flexible and adaptable. In order not to change the structure of the original wiring system due to changes in equipment, only a little adjustment is needed to improve the adaptability of the network.
(3) Easy management and maintenance. It is to facilitate the management and maintenance of the campus network.
(4) The technology and economy are reasonable. It is to use less economy to realize a larger network wiring system and better optimize the network environment of our campus. Provide a good environment for users on campus. In short, the principle of integrated wiring system is to save costs and improve work efficiency.
3. Demand analysis:
Prior to the planning and design of the integrated wiring system project, the user's information needs must be investigated and predicted. Without scientific and accurate survey predictions, the comprehensive wiring design of the campus network is just extravagance. It is necessary to conduct field surveys of related buildings, understand the structure and design of the building, and use the construction drawings provided by the user to comprehensively grasp the difficulty and progress of the construction and estimate the approximate cost. Other data to know include: the location of the central computer room, the number of information points, the longest distance between the information point and the central computer room, the status of the power system, the condition of the building, etc. First, determine the number and type of cores in the fiber optic cable. The optical cable is mainly composed of optical fiber, plastic protective sleeve and plastic sheath. A certain number of optical fibers form a cable core in a certain way. It is sheathed and some are covered with an outer sheath to achieve optical signal transmission. Kind of communication line. When designing integrated wiring, you must determine the relevant data of the optical cable according to the cost and the distance of the building. Second, inspect the laying method. The determination of the laying method is not arbitrary, and judgment must be made according to the distance between the building groups and the road conditions. Third, determine the indoor wiring method and the location of the wiring room. After comprehensively examining the information points of each building group, the specific wiring method and the reasonable location of the wiring room are determined.
4. Network topology diagram:
In the comprehensive wiring design plan, the determination of the network topology diagram is very important. The so-called network topology diagram refers to a physical layout. This layout is based on the interconnection of transmission media, and the structure generally covers a tree structure, a mesh structure, a ring structure, a bus structure, and so on. Generally, a star topology is selected in the integrated wiring system, and it will be managed, maintained, and expanded later.
5. The scheme of six subsystems:
5.1 Workspace subsystem
The work area subsystem is an area that extends from the information outlet to the terminal equipment. Work area wiring requirements are relatively simple, making it easy to move, add, and change equipment. This subsystem includes the information outlets of the horizontal distribution system, jumpers to connect the information outlets and terminal equipment, and adapters. The location of information points in some school work areas is so small that it can be concealed. Users can choose between telephone access and network access according to their needs and actual conditions. In this bidding scheme, a total of 169 information points were designed according to user needs. In the design of the work area, in order to meet the actual needs of the college, the MAX series modules of Simon Company were specially selected. The product consists of adapters, information panels, super five types of information modules, and mechanism soft jumpers.
5.2 Horizontal Zone Subsystem
The horizontal subsystem is a part of the entire wiring system. Generally on a floor, it starts from the information outlet in the work area to the distribution frame of the management room subsystem. First, in order to achieve the convenience and flexibility of network applications, voice lines and the like are all super five twisted pairs. Category 5 twisted-pair cables have the characteristics of low attenuation and low crosstalk, and have higher attenuation and crosstalk ratios, signal-to-noise ratio, and smaller delay errors. Secondly, in order to solve the problem of optical fiber to the desktop, a multi-media optical fiber coupling panel will be adopted and lead directly from the equipment to the work area information interface. Third, the length should be appropriate. Generally speaking, the horizontal distance is between 15m and 75m. Fourth, the horizontal steel channel must have 1/3 of the redundancy when wiring. The access work area uses a 2.0mm thick galvanized steel pipe, and voice points and data points are all enhanced five UTP cables.
5.3 Vertical Trunk Subsystem
The integrated wiring system includes three subsystems: wiring (horizontal) subsystem (TO-FD); trunk (vertical) subsystem (FD-BD); building group subsystem (BD-CD). Among them, the trunk (vertical) subsystem (FD-BD) has a very prominent position. First, the system distributes routes between equipment to various management areas and distribution frames and distribution line frames. Second, the backbone of the voice communication system uses Category 5 25 pairs of large log UTP cables. Third, the selection of optical fibers and optical transceivers. According to reality
In some cases, the data backbone system mostly uses 6-core 62.5um / 125um multimode fiber, and the fiber transceiver generally uses multimode 10Mb / s / 100Mb / s. Fourth, measures for network upgrade. The development of the network is changing rapidly, and it may be upgraded at any time. Therefore, it is necessary to leave two optical fibers and channels in the main shaft for emergency needs.
5.4 Management Subsystem
The management subsystem, also called the management subsystem, is a subsystem of the integrated wiring system. The integrated wiring system includes the equipment subsystem, the building trunk subsystem, the vertical wiring subsystem, the management subsystem, the horizontal wiring subsystem, and the work area wiring subsystem. The management subsystem consists of wiring equipment, input / output equipment, etc. in the transfer room. The management subsystem can also be applied to the subsystem between devices. The management subsystem should use a single point to manage the dual transfer interface. The transfer field depends on the work area. First, the data distribution system uses Cat.5e, which is a super-type five-type 24-port unshielded distribution frame. Second, the connection between the main equipment. The equipment connection between the main equipment is generally a 24-port cabinet-type optical fiber distribution frame. Third, the voice system selects 100 pairs of 110 wire racks. Fourth, there are a total of 3 sub-administration areas. The first to fourth layers are managed between the master devices on the second floor, the fifth to seventh floors are managed on the sixth floor, and the eighth to eleven floors are on the eighth floor. In addition, there must be a fiber link, and 2 fiber channels and a 6-core fiber must be reserved at the same time.
5.5 Inter-device subsystem
The equipment room subsystem consists of equipment room cables, connectors, and related supporting hardware to interconnect various common system equipment. The main equipment among the equipment are digital program-controlled switches, computer network equipment, servers, host computers for building automation equipment, and so on. The equipment room is the data exchange center of the entire network. Its normality directly affects the user's office, so the wiring room must be strictly designed. At the same time, make sure that the horizontal cable length of each information point does not exceed 90m. In this project design, the wiring room should be designed as appropriate, with wiring rooms on the 2nd, 6th, and 8th floors, respectively. Generally, the wiring cabinet is a 2m 19in (about 48cm) cabinet.
5.6 Building Complex Subsystem
The building group subsystem should be composed of integrated cabling lines, building group distribution equipment (CD), and jumpers, etc. that connect the various buildings. The subsystems of the building group should adopt the laying method of underground pipes or cable trenches. The copper or optical cables laid in the pipeline shall follow the design requirements for telephone pipelines and access holes. At the same time, at least 1 or 2 spare pipe holes should be reserved during installation for expansion. The wiring distance of the building subsystem is mainly determined by the distance between the two buildings. Generally, 1M cables are reserved in each outdoor wiring well. The design plan has left interfaces and redundancy for the cables in the work area. The cables from each building are connected to their respective management centers, and the campus network can be formed.
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