CECS : 7297 Design Specifications for Integrated Cabling Systems for Buildings and Building Complexes
Some standard content:
Revised version of the Code for Engineering Design of Integrated Cabling Systems for Buildings and Building Complexes (CECS72:97)
1. System Design
1.0.1 The integrated cabling system (GCS) should be an open structure, and should be able to support telephones and various computer data systems, as well as the needs of systems such as conference television and surveillance television. The integrated cabling system should be designed with a star topology, in which each branch subsystem is a relatively independent unit, and changes to each branch unit system will not affect other subsystems. As long as the node connection is changed, the network can be converted between various types of networks such as star, bus, and ring. The integrated cabling system should adopt an open structure and should be able to support various local networks and computer systems currently in common use: mainly RS-232-C (synchronous/asynchronous), star network (Star), local area/wide area network (LAN/WAN), Wang An network (WangOIS/VS), token ring (TokenRing), Ethernet (Ethernet), optical fiber distributed data interface (FDDI), etc.
1.0.2This specification refers to the provisions of the international standard IS0/IEC11801 "General Requirements for Cable Laying in Customer Buildings" and divides the building integrated wiring system into six subsystems: Workspace Subsystem
Wiring (Horizontal) Subsystem
Trunk (Vertical) Subsystem
Equipment Room Subsystem
Management Subsystem
Building Complex Subsystem
The workspace subsystem consists of the connection (soft cord) between the terminal equipment and the information socket. It includes the assembly soft cord, connector and the extension soft cord required for connection, and is connected between the terminal equipment and the input/output (I/O). It is equivalent to the user line and telephone terminal part connected to the telephone in the telephone wiring system. In the intelligent building wiring system, the workspace is replaced by the term service area (coverage area), and the service area is usually larger than the workspace. The wiring subsystem extends the trunk subsystem line to the user's workspace, which is equivalent to the wiring cable or the user line part connected to the user's outlet box in the telephone wiring system. The trunk subsystem provides the routing of the building's trunk cables. This subsystem consists of cables of different types, or cables and optical cables, as well as the connection of this trunk to the relevant supporting hardware. It is equivalent to the trunk cables in the telephone distribution system.
The equipment room subsystem connects the trunk cross-connection and the wiring cross-connection to the functional system equipment. It consists of cables, connectors and related supporting hardware in the equipment, and it interconnects the various different equipment of the functional system equipment. It is equivalent to the in-station wiring equipment and cable and wire connection part in the telephone distribution system.
The management subsystem consists of cross-connection, interconnection and input/output (I/O), providing a means of connection for connecting other subsystems. It is equivalent to the wiring box or telephone junction box part of each floor in the telephone distribution system. The building complex subsystem extends from the cable in one building to the communication equipment and devices in other buildings in the building complex. It provides the hardware required for communication facilities between buildings. Among them are cables, optical cables and electrical protection equipment to prevent the surge voltage of the cable from entering the building. It is equivalent to the key cable protection box of the telephone distribution and the line cables between buildings. The structure of the integrated wiring system for buildings and building complexes is shown in Figure 1.02-1:
The schematic diagram of the integrated wiring system is shown in Figure 1.0.2-2:1.0.3 The engineering design of intelligent buildings and intelligent building parks should select an appropriate type of integrated wiring system based on actual needs, and should meet the following requirements:1 Basic type, suitable for occasions with lower configuration standards in the integrated wiring system, and use copper core twisted pair cables for networking. Basic integrated wiring system configuration:
Each work area has an information socket;
The distribution cable for each work area is a 4-pair twisted cable; clamp-type handover hardware is used;
The trunk cable of each work area has at least 2 pairs of twisted pairs, 2 Enhanced type, suitable for occasions with medium configuration standards in the integrated wiring system, and use copper core twisted pair cables for networking. Enhanced integrated wiring system configuration:
Each work area has two or more information sockets; each work area's wiring cable is 2 4-pair twisted cables using value-added connection or plug-in handover hardware; each work area's wiring cable consists of at least 1 pair of twisted pairs. 3 Comprehensive type, suitable for occasions with higher configuration standards in the integrated wiring system, using optical cables and copper core twisted pair cables for mixed networking. The configuration of the integrated integrated wiring system should add an optical cable system on the basis of the basic and enhanced integrated wiring systems.
All basic, enhanced, and integrated integrated wiring systems support voice/data and other systems, and can be switched to higher-function wiring systems as the project requires. The main differences between them are: ① The method used to support voice and data services, ② The flexibility of line management during movement and re-layout. Most basic integrated wiring systems can support voice/data, and their features are: 1. It is a price-competitive integrated wiring solution that can support all voice and data applications; 2. It can be used for voice, voice/data or high-speed data; 3. It is easy for technicians to manage; 4. It uses gas discharge tube overvoltage protection and self-recovering transition protection; 5. It can support the transmission of data from multiple computer systems. The enhanced integrated wiring system not only has enhanced functions, but also provides room for development. It supports voice and data applications, and can be managed by terminal boards as needed: Enhanced integrated wiring system features:
1 Each work area has two information sockets, which are not only exciting and flexible, but also fully functional: 2 Any information socket can provide voice and high-speed data applications; 3 The color code can be unified, and the terminal board can be used for management as needed; 4 It is an economical and effective integrated wiring solution that can serve multiple data equipment creation department environments; 5 It adopts gas discharge tube overvoltage protection and self-recovering overcurrent protection: The main feature of the integrated integrated wiring system is the introduction of optical cables, which can be applied to large-scale intelligent buildings. The other features are the same as the basic or enhanced machines. The twisted pair cable in the article refers to the cable with a special cross-over method and material structure that can transmit high-speed digital signals, not ordinary city telephone cables.
The clamp-type handover hardware system in the article refers to the handover equipment with clamping and winding fixed connections. Plug-in handover hardware refers to the handover equipment connected with plugs and sockets. 1.0.4The integrated wiring system shall be able to meet the transmission rate requirements of the supported data system, and the corresponding level of cables and transmission equipment shall be selected.
The transmission rate requirements of the computer system are shown in Table 1.0.4Table 1.0.4 Transmission rate requirements
RS-232
StarLANI
IBM3270
4MtokenRing
10BASE-T
16MTokenRing
TP-PMD/CDDI
100BASE-T
Transmission rate requirements (bit/s)
≤20K
1M-10M
155M/622M
1.0.5The integrated wiring system shall be able to meet the transmission standard requirements of the supported telephone, data and television systems. 1.0.6 The classification and transmission distance limit of the integrated wiring system shall comply with the provisions listed in Table 1.0.6: Table 1.0.6 System classification and transmission distance limit table Note: 1100m distance includes the 10m allowable total length including the connection cord/jumper, work area and equipment area wiring. The technical conditions of the link are considered based on 90m horizontal cable, 7.5m long connection cable and 3 similar connectors. If the total additional length of the integrated work and equipment area cable is not more than 7.5m, this type of use is valid.
23000m is the limit specified in the international standard range, not the dielectric limit. 3 For distances greater than the length of 100m twisted pair cable in the horizontal cable subsystem, feasible application standards should be negotiated.
The system classification and transmission distance limit adopts the IS0/IEC11801:1995 (E) international standard, which focuses on the requirements of various computer networks. When the integrated wiring system is used for other purposes such as public telephone network or public data communication, it should be designed in accordance with relevant standard requirements. The table specifies two specifications, 100Q and 150Q, which are formulated according to the communication industry standard YD/T838.1~4-1996 <Twisted Pair/Star Twisted Symmetrical Cable for Digital Communication>. my country stipulates that 120Q products are not produced, but considering that the projects that have been built and are under construction have adopted 120Q products imported from abroad, the relevant standards can be referred to during the construction acceptance to properly resolve the issue. New projects are not allowed to use 1202 products.
1.0.7 The networking of the integrated wiring system and the length limit of each cable segment shall comply with the provisions shown in Figure 1.0.7: Chunxi
1.0.8. In the engineering design of the integrated wiring system, all the selected cables, optical cables, various connecting cables, jumpers, and wiring equipment and other hardware facilities shall comply with the provisions of the international standard IS0/IEC11801:1995 (E) to ensure the implementation of the system indicators. In the engineering design of the integrated wiring system, appropriate integrated wiring hardware facilities shall be selected according to the needs of short-term and long-term communication services, computer network topology, etc. The indicators of the selected products shall be higher than the system indicators to ensure that the system indicators are met, but the higher the better. If the selection is too high, the project cost will increase, and if the selection is too low, it will not meet the project needs. It should be appropriate. 1.0.9 The integrated wiring system shall be equipped with a Chinese display computer information management system. Manually log in the working status information of the hardware facilities related to the integrated wiring system, including: the purpose of the community and cables, the using department, the topological structure of the LAN, the paging element information rate, the configuration status of the terminal equipment, the occupied hardware number, the color code, the function of the link and the main characteristic parameters, the integrity of the link, the fault record and other contents. The equipment location and cable direction should also be logged in, such as the building name, location, area code, floor number, room number, etc.
Considering that the integrated wiring system is applicable to various services such as various communication services and computer networks, and is also applicable to various units or departments using the integrated wiring system of the same building, if the use and management cannot keep up, it will cause unnecessary trouble. In order to ensure that the operation of the integrated wiring system can be clear at a glance, the specification stipulates the establishment of a computer information management system, and the manual logging of various operating states is convenient for operators to quickly and accurately dispatch applications and handle fault conditions in a timely manner. 1.0.10 When designing the system, the cables, connecting hardware, jumpers, connecting wires, etc. selected for the entire system must be consistent with the selected category. If shielding measures are adopted, the entire system must be designed according to shielding. When designing the system, if the Category 5 standard is selected, the cables, connecting hardware, jumpers, connecting wires, etc. of the entire system must all be Category 5 to ensure that the system is Category 5. If shielding measures are adopted, all components of the entire system should use shielded hardware, and good grounding should be done according to design requirements to ensure the shielding effect. 2. System indicators
The system indicators specified in this chapter refer to the relevant parts of the IS0/IEC11801 international standard. Product standards for cables, connection hardware, etc. should also comply with international standards.
2.0.1 The maximum attenuation limit of the link transmission of the integrated wiring system, including the connection hardware, jumpers and work area connection cables at both ends, shall comply with the provisions of Table 2.0.1:
Table 2.0.1 Maximum attenuation limit of link transmission Table Maximum attenuation limit (dB)
Note: It is required that after connecting each point into a curve, all the tested curves should be within the limit range of the standard curve. 2.0.2 The near-end crosstalk attenuation limit between any two pairs of lines in the integrated wiring system, including the connection hardware, jumpers and work area connection cables at both ends (but not including equipment 2.0. connectors), 2.0. It shall comply with the provisions of Table 2.0.2: Table 2.0.2 Minimum crosstalk attenuation limit between pairs Table Minimum crosstalk attenuation limit (dB)
Note: 1 The noise of all other sound sources shall be 10db54 lower than the crosstalk noise of all application frequencies
2 In large-log trunk cables, the near-end crosstalk attenuation value of the worst pair shall be measured by the power accumulation number. 3 For bridged branched or multi-combination cables, and cables connected to multiple information sockets, the near-end crosstalk attenuation between any symmetrical cable group or unit shall be at least one value △ better than the near-end crosstalk attenuation of a single combination of 4 pairs of cables, △=6dB+101g(n+1)dB Where: n is the number of symmetrical cable groups other than optical fibers in the cable. 2.0.3 The reflection attenuation limit at any cable interface in the integrated wiring system shall comply with the provisions of Table 2.0.3: Table 2.0.3 Minimum reflection attenuation limit at cable interface Table Minimum reflection attenuation limit
1≤f≤10
10≤f≤16
16≤f≤20
20≤f≤100
2.0.4 The ratio of link attenuation to near-end crosstalk attenuation (ACR) of the integrated wiring system shall comply with Table 2.0. 0.4 provisions: Table 2.0.4-1 Minimum ACR limit table
Minimum ACR limit (dB)
Note: 1ACR(dB)=aN-a(dB)
Where: αN-near-end crosstalk attenuation between any two line pairs a
attenuation value of link transmission
2The ACR values listed in this table are better than the calculated values. A certain limit of trade-off is allowed between attenuation and crosstalk attenuation, and the selection range is shown in Table 2.0.4-2.
Table 2.0.4-2 Attenuation and near-end crosstalk attenuation selection limit table Frequency (MHz)
Maximum attenuation (dB/100m) Minimum near-end crosstalk attenuation L at 100m (dB)
The ratio of link attenuation to near-end attenuation (ACR) of the integrated wiring system, taking 100MHz as an example, is specified as 4dB in Table 2.0.4-1 and 10dB in Table 2.0.4-2, and subtracted from Table 2.0.1 and Table 20.2 0.8dB is obtained, and ACR has three values. When designing, the DC loop resistance limit of the integrated wiring system line pair should be reasonably selected according to the use requirements. When the system classification and transmission distance are specified in 1.0.6, they should comply with the provisions of Table 2.0.5:
Table 2.0.5 DC loop resistance limit table
Link level
Maximum loop resistance (2)
The DC loop resistance value of the link should be 12/100m. Note: The DC loop resistance value of the 100 twisted pair cable should be 19.2/100m; the 150 twisted pair cable should comply with the provisions of Table 2.0.6:
2.0.6 Propagation delay limit of the integrated wiring system line pair, Table 2.0.6 Maximum propagation delay limit table
Measurement frequency (MHz)
The maximum propagation delay of the wiring (horizontal) subsystem shall not exceed 1μS. Note:
Delay (Us)
2.0.7 The longitudinal differential conversion attenuation (balanced) limit of the integrated wiring system shall comply with the provisions of Table 2.0.7: Table 2.0.7 Longitudinal differential conversion attenuation limit table Minimum longitudinal differential conversion attenuation limit table (dB) Class A
Note: The test method for longitudinal differential conversion attenuation is under study. Grade D
Should comply with the provisions of Table 2.0.8:
2.0.8 Various parameters of the wavelength window of the optical cable of the integrated wiring system, Table 2.0.8 Optical cable wavelength window parameter table
Fiber mode, nominal wavelength (nm) Lower limit (nm) Upper limit (nm) Benchmark test wavelength (nm) Maximum spectral width FWHM (nm) Multimode 850
Multimode 1300
Single mode 1310
Single mode 1550
Note: 1 Multimode optical fiber: The nominal diameter of the core wire is 62.5/125 or 50/125. The maximum attenuation of 850nm wavelength is 3.5dB/km;?/font>3. Work area subsystem
3.0.1 An independent area where terminal equipment needs to be set up should be divided into a work area. The work area subsystem should be composed of connecting cables and adapters extending from the information sockets of the wiring (horizontal) wiring system to the workstation terminal equipment. The service area of a work area can be estimated as 5-10m2. Each work area is equipped with a telephone or computer terminal equipment, or it can be set up according to user requirements. Each information socket in the work area should support the setting and installation of terminal equipment such as telephones, data terminals, computers, televisions and monitors. 3.0.2 The selection of work area adapters should meet the following requirements: 1 When using connectors of different information sockets at the equipment connector, a dedicated cable or adapter can be used: 2 When opening ISDN services on a single information socket, a network terminal adapter should be used; 3 When the cable category (medium) selected in the wiring (horizontal) subsystem is different from the cable category (medium) required by the equipment, an adapter should be used;
4 When connecting corresponding devices such as digital-to-analog conversion or data rate conversion using different signals, an adapter should be used; 5 For the compatibility of network protocols, a matching adapter can be used: 6 According to the different telecommunications terminal equipment in the work area, corresponding terminal adapters can be equipped. 4. Wiring subsystem
4.0.1 The wiring subsystem should consist of information sockets for the work area, wiring cables from each floor wiring equipment to the information sockets, floor wiring equipment and jumpers.
The wiring subsystem is a general term for the wiring (horizontal) cables on each floor. 4.0.2 The wiring subsystem should be designed according to the following requirements: 1 According to the short-term and long-term terminal equipment requirements of the project; 2 The number of information sockets to be installed on each floor and their locations; 3 The details of the possible movement, modification and rearrangement of the terminals in the future; 4 Comparison of the one-time construction and phased construction schemes. 4.0.3 The wiring subsystem should use 4 pairs of twisted cables. The wiring subsystem should use optical cables in high-speed applications. According to the requirements of the entire integrated wiring system, the wiring subsystem should be connected on the wiring equipment in the secondary handover room, handover room or equipment room to form and manage the telephone, data, and television systems. 4.0.2 Ordinary copper core twisted cables should be used for wiring cables. For the selection of wiring cables, please refer to the stripe description in Chapter 2. 4.0.2 The information sockets of the integrated wiring system should be selected according to the following principles: 1 Single-connected 8-core sockets should be used for basic systems; 2 Double-connected 8-core sockets should be used for enhanced systems; A given integrated wiring system design can use multiple types of information sockets. 4.0.6 The length of the wiring subsystem cable should be within 90m. 4.0.7 The information sockets are connected with fixed wires inside. 5. Trunk subsystem
5.0.1 The trunk subsystem should consist of wiring equipment and jumpers between devices and connecting cables from equipment to wiring rooms on each floor. The trunk subsystem is a general term for vertical trunk cables between floors. 5.0.2 Before determining the total number of cable pairs required for the trunk subsystem, the sharing principle of voice and data signals in the cable must be determined. For the basic type, 2 pairs can be selected for each work area; for the enhanced type, 3 pairs of twisted pairs can be selected for each work area. For the comprehensive type, each work area can add an optical cable system based on the basic or enhanced type. 5.0.3 The shortest, safest and most economical route for the trunk cable should be selected. It is advisable to choose a closed channel with a door to lay the trunk cable. There are two major types of channels in buildings, closed and open. A closed channel is a series of vertically aligned handover rooms, one on each floor, with cable shafts, cable holes, pipe cables, cable trays, etc. passing through the floor layers of these rooms. Each handover room usually has some facilities and fire protection devices to facilitate the fixing of cables. An open channel is an open space from the basement to the top of a building, without any floor slabs in the middle, such as ventilation or elevator passages, where trunk subsystem cables cannot be laid. 5.0.4 Trunk cables can be terminated point-to-point, or by decreasing termination and direct cable connection methods. Point-to-point termination is the simplest and most direct connection method. Each trunk cable of the trunk subsystem extends directly to the designated floor and handover room. The protection box divides out several small cables, which extend to each handover room or each floor respectively and terminate at the connection hardware at the destination.
The direct cable connection method is a technology used in special cases. One case is that all horizontal terminations on a floor are concentrated in the trunk handover room, and the other case is that the secondary handover room is too small and the termination is completed in the trunk handover room. 5.0.5 If the equipment room and the computer room are in different locations, and the voice cable needs to be connected to the computer room, different trunk cables or different parts of the trunk cables should be selected in the design to meet the needs of different routing voice and data. When necessary, optical cable systems can also be used to meet this requirement. 6. Equipment room subsystem
6.0.1 The equipment room is a place where incoming line equipment is set up at appropriate locations in each building, where network management is carried out and where management personnel are on duty. The equipment room subsystem should consist of the building incoming line equipment of the integrated wiring system, various host equipment such as telephone, data, and computer, and their security wiring equipment.
The telephone, data, computer host equipment, and their security wiring equipment of the equipment room system should be set up in one room. If necessary, the outputs can be set up separately, but the distance between the programmable telephone exchange and the computer host room should not be too far from the equipment room. 6.0.2 All incoming line terminal equipment in the equipment room should use color codes to distinguish the wiring areas of different types of purposes. 6.0.3 The location and size of the equipment room should be determined based on the number, scale, optimal network center, etc. of the equipment. 7. Management subsystem
7.0.1 The management subsystem is set in the room of the wiring equipment on each floor. The management subsystem should consist of wiring equipment, input/output equipment, etc. in the handover room. It can also be applied to the equipment room subsystem. The management subsystem provides a means of connecting with other subsystems. Handover makes it possible to arrange or rearrange routes, so that the communication lines can continue to the various information sockets connected to the inside of the building, thereby realizing the management of the integrated wiring system. 7.0.2 The management subsystem provides a means of connecting with other subsystems. The structure of the handover field depends on the work area, the scale of the integrated wiring system and the selected hardware. When the management scale is large, complex, and there is a secondary handover room, dual-point management and dual handover are set up. At the management point, it is advisable to mark each termination field with a marking insertion strip according to the application environment. Single-point management is located near the switch in the equipment room, and is directly connected to the second wiring handover area in the user room or service wiring room without jumper management through the line. In addition to the dual-point management handover room, a second manageable handover is also set up. The dual handover is through a secondary handover device. The way to achieve line management in each handover area is to connect jumper wires or patch cords between the color-coded fields. These color codes are used to indicate whether the field is a trunk cable, a distribution cable, or an equipment termination point. These fields are usually assigned to designated wiring blocks, and the wiring blocks are arranged in a vertical or horizontal structure. 7.0.3 The handover area should have a good marking system, such as signs of building name, building location, area code, starting point, and function. The integrated wiring system uses three types of markings: cable markings, field markings, and insertion markings. Among them, insertion markings are the most commonly used. These markings are usually cardboard or other forms, and are removed and used by installers when needed. 7.0.4 The equipment of the main line in the handover room and the secondary handover room should be distinguished by color codes for wiring areas of various purposes. 7.0.5 The selection of the connection method of the handover equipment should comply with the following provisions: 1 When the lines on the floor are rarely modified, moved or reorganized, the clamp wiring method should be used: 2 When the lines are frequently reorganized, the plug wiring method should be used. 7.0.6 Space should be left between the handover sites to accommodate the handover hardware for future expansion. 8. Building complex subsystem
8.0.1 The building complex subsystem consists of the telephone, data, and television systems of two or more buildings to form a building complex integrated wiring system, which connects the cables and wiring equipment (CD) between the buildings to form the building complex subsystem. 8.0.2 The building complex subsystem should be laid in underground pipelines. The copper cable or optical cable laid in the pipeline should comply with the various design regulations of the telephone pipeline and manhole. In addition, at least 1-2 spare pipe holes should be reserved during installation for expansion. 8.0.3 When the building complex subsystem is laid in a direct buried trench, if other image and monitoring cables are buried in the same trench, an obvious common sign should be set up.
8.0.4 The advantages and disadvantages of the cable laying methods for the building complex subsystems 8.0.1, 8.0.2, and 8.0.3 are shown in Table 8.0.1. Table 8.0.1 Cable laying methods
In the pipeline
9. Optical cable transmission system
Provides the best mechanical protection. The cables can be laid at any time by digging trenches, opening pipelines, and building entry holes. The laying and expansion of cables are easy, and the initial investment can be kept high. The appearance of roads and buildings is neat.
Provides a certain degree of mechanical protection, keeps the appearance of roads and buildings neat, and the initial investment is low. If there are electric poles, the cost is the lowest. The appearance of roads and buildings is not mechanically protected, and the safety is poor, which affects the beauty of buildings.
9.0.1 When the integrated wiring system needs to transmit long-distance lines between a group of buildings, the lines in the building will form a high-speed network with telephones, computers, hubs, dedicated switches and other information systems, or the outside world and other networks, especially the power network, are laid together with anti-electromagnetic interference requirements, optical cable digital multiplexing equipment should be used as the transmission medium. The optical cable transmission system should be able to meet the comprehensive transmission requirements of the building and building environment for telephone, data, computer, television, etc. When used for computer local area networks, multi-mode optical cables should be used; when used as part of a public telephone or data network, single-mode optical cables should be used. The optical cable transmission system can provide higher speeds and transmit more information, and is suitable for large-scale integrated wiring systems. At present, practical optical cable transmission equipment, devices and optical cables can be provided. Integrated wiring system integrates multiple information systems such as voice, data, conference television, and surveillance television. The use of optical cables can increase the transmission distance. Therefore, the integrated wiring system is an integrated distribution network system composed of optical cables and copper cables. The optical cable transmission system can form a network that is resistant to electromagnetic interference.
Generally, multimode optical cables are suitable for short-distance computer local area networks. If used in public telephone networks and data networks, it is better to use optical cable systems with appropriate specifications.
9.0.2 When the handover hardware of the integrated wiring system uses optical cable components, the equipment room can be used as the location for setting up the main handover field of the optical cable. The trunk optical cable extends from this centralized termination and entry and exit point to other floors, and the optical cable is distributed horizontally on each floor through the optical cable and the connection device.
9.0.3 The optical cable transmission system should use standard unit optical cable connectors. The connectors can be terminated at the optical cable handover unit. The connection of the ceramic head should ensure that the attenuation of each connection point is not more than 0.4dB. The attenuation of each connection point of the connector with a plastic head is not more than 0.5dB. For the STII connector with a ceramic head, the attenuation change caused by every 1000 reconnections is less than 0.2dB. For the STⅡ connector with a plastic head, the attenuation change caused by every 200 reconnections is less than 0.2dB. Regardless of the type of STII connector, the average time required to install a connector is 16 minutes. However, if 12 STII connectors are installed at the same time, the average installation time for each connector is 6 minutes. 9.0.4 The integrated wiring system should use a slow-change enhanced multi-mode optical cable with an optical fiber diameter of 62.5um and an optical fiber cladding diameter of 125, with a nominal wavelength of 850nm or 1300nm; a single-mode optical cable with a nominal wavelength of 1310nm or 1550nm can also be used. Integrated wiring in buildings is generally used for long-distance transmission. 9.0.5 The digital serial bit rate and digital interface characteristics of the optical cable digital transmission system shall comply with the following provisions: 1PDH digital serial bit rate level shall comply with the provisions of the national standard GB4110-83 "Pulse Code Modulation Communication System Series", as shown in Table 9.0.5:
Table 9.0.5 Series bit rate
Digital serial level
Nominal bit rate (kbps) 2048
Secondary group
Third group
Fourth group
139264
2 The bit rate deviation, pulse waveform characteristics, code type, input and output port specifications of the digital interface shall comply with the provisions of the national standard GB7611D-87 "Pulse Code Modulation Communication System Network Digital Interface Parameters". 9.0.6 The optical cable transmission system should use loose tube or skeleton fiber bundled optical cable, and ribbon optical fiber cable can be used. 9.0.7 The hardware handover equipment of the standard optical cable connector in the optical cable transmission system should not only support the connector, but also directly support the bundled optical cable and the jumper optical cable.
9.0.8 The connection of various optical cables should use a universal optical cable box to provide reliable connection and protective housing for the joints of bundled optical cables, ribbon optical cables or jumper optical cables. The optical cable entrance provided by the universal optical cable box should be able to accommodate multiple building optical cables at the same time. Optical cables, like copper cables, also have armored, ordinary and filled types. When ribbon optical cables are interconnected with ribbon optical cables, display splicing connectors must be used. If the optical cable in a ribbon optical cable is to be interconnected with an indoor non-ribbon optical cable, an enhanced conversion splicing connector should be used. 9.0.9 The optical cable wiring network can be installed in a building or building complex environment, and can support various bandwidth communication services that were not clearly defined in the initial design stage. Such a wiring system can be used as an independent local area network (LAN) or a local image transmission network such as conference television and surveillance television, and can also be connected to the public telephone network. 10. Power supply, protection and grounding
10.1 Power supply
10.1.1 When placing a computer host in an equipment room, the engineering design should be carried out in accordance with the power supply requirements of the computer host. 10.1.4 When placing a program-controlled user exchange in an equipment room, the engineering design should be carried out in accordance with the "Engineering Design Specifications for Program-controlled User Exchanges in Industrial Enterprises" CECS09:89.
10.1.6 A reliable AC 220V, 50Hz power supply should be used in the equipment room and the handover room. The equipment room should have a reliable AC power supply. Do not use the adjacent lighting switch to control these power sockets to reduce accidental power outages.
10.2 Electrical protection and grounding
10.2.1 Protective measures should be taken for the integrated wiring network in the following situations: 1. When the following interference sources exist inside the building and a safe interval cannot be maintained: High-frequency interference generated by the distribution box and distribution network Some interference waves generated by the electric spark of high-power motors Fluorescent lamps, electronic starters
Switching power supply
Ringing current of the telephone network
Periodic pulses generated by information processing equipment 2. When the following interference sources exist outside the building, And in an environment with high electromagnetic field strength: radar
radio transmitting equipment
mobile phone base station
high voltage wire
electrified railway
lightning strike area
3When the interference signal field strength of the surrounding environment or the noise battery of the integrated wiring system exceeds the following provisions: For computer local area network, the interference signal below 10kHz to 600MHz is introduced, and its field strength is 1V/M; the interference signal from 600kHz to 2.8GHz is 5V/M.
For telecommunications terminal equipment, through signal, DC or AC lead-in lines, the RF0.15MHz to 80MHz interference signal is introduced, and its field strength is 3V, (amplitude modulation 80%, 1KHz) For terminal equipment with analog/digital terminal interface, when providing telephone services, the noise signal level shall comply with the provisions of Table 10.2.1-1. Table 10.2.1-1 Noise signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
-20 Note
-20 Note
Note: The bandwidth where the noise level exceeds -40dBm should be less than 200MHz When the terminal equipment provides acoustic interface service, the noise signal level should comply with the provisions of Table 10.2.1-2: Table 10.2.1-2 Noise signal limit Acoustic signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
Reference level
Reference level+20dB Note
Reference level
Reference level+20dB Note
Note: 1. The total bandwidth of the noise level exceeding the reference level should be less than 200MHz 2. The nature of the reference level: 1KHz-40dBmo sinusoidal signal. Additional requirements for primary access equipment of ISDN: the number of frame line losses should be less than 10 within a 10-second test period. The background noise should be at least -12dB less than the reference level. When the electric field strength of the interference wave emitted by the integrated wiring system exceeds the provisions of Table 10.2.1-3: Table 10.2.1-3 Limits of the electric field strength of the emitted interference wave Frequency range
Measurement distance
30MHz~230MHz
>230MHz~1GHz
Note: 1. Class A equipment: tertiary industry; Class B equipment: residential. 2. The lower limit applies to the case of reduced frequency 1 Class B equipment 10m
Class A equipment 30m
30dBμV/m
37dBμV/m
30dBμV/m
37dBμV/m
Whether the integrated wiring system needs to take protective measures is relatively complex, among which the most harmful is the prevention of electromagnetic interference and electromagnetic radiation. Electromagnetic interference will affect the normal operation of the integrated wiring system; electromagnetic radiation will affect the security of the integrated wiring system in normal operation, preventing information from being stolen by irrelevant personnel, or cause electromagnetic pollution. When designing the integrated wiring system project, it is necessary to make careful arrangements and considerations according to the requirements of the construction unit and select appropriate protective measures. Different protective measures should be taken according to different use occasions of the integrated wiring. The specifications list various types of interference sources, which should be paid attention to during design. The key points of protection are explained as follows: 1 Anti-electromagnetic interference5um fiber cladding diameter 125 slow-change enhanced multimode optical cable, nominal wavelength 850nm or 1300nm; single-mode optical cable with nominal wavelength 1310nm or 1550nm can also be used. Integrated wiring in buildings is generally used for distance transmission. 9.0.5 The digital serial bit rate and digital interface characteristics of the optical cable digital transmission system shall comply with the following provisions: 1PDH digital serial bit rate level shall comply with the provisions of the national standard GB4110-83 "Pulse Code Modulation Communication System Series", as shown in Table 9.0.5:
Table 9.0.5Serial bit rate
Digital serial level
Nominal bit rate (kbps) 2048
Secondary group
Third group
Fourth group
139264
2The bit rate deviation, pulse waveform characteristics, code type, input and output port specifications of the digital interface shall comply with the provisions of the national standard GB7611D-87 "Pulse Code Modulation Communication System Network Digital Interface Parameters". 9.0.6The optical cable transmission system should use loose tube or skeleton fiber bundled optical cable, and ribbon optical fiber cable can be used. 9.0.7 The hardware handover equipment of the standard optical cable connector in the optical cable transmission system should not only support the connector, but also directly support the bundled optical cable and the jumper optical cable.
9.0.8 The connection of various optical cables should use a universal optical cable box to provide reliable connection and protective housing for the joints of bundled optical cables, ribbon optical cables or jumper optical cables. The optical cable entrance provided by the universal optical cable box should be able to accommodate multiple building optical cables at the same time. Optical cables, like copper cables, also have armored, ordinary and filled types. When ribbon optical cables are interconnected with ribbon optical cables, display splicing connectors must be used. If the optical cable in a ribbon optical cable is to be interconnected with an indoor non-ribbon optical cable, an enhanced conversion splicing connector should be used. 9.0.9 The optical cable wiring network can be installed in a building or building complex environment, and can support various bandwidth communication services that were not clearly defined in the initial design stage. Such a wiring system can be used as an independent local area network (LAN) or a local image transmission network such as conference television and surveillance television, and can also be connected to the public telephone network. 10. Power supply, protection and grounding
10.1 Power supply
10.1.1 When placing a computer host in an equipment room, the engineering design should be carried out in accordance with the power supply requirements of the computer host. 10.1.4 When placing a program-controlled user exchange in an equipment room, the engineering design should be carried out in accordance with the "Engineering Design Specifications for Program-controlled User Exchanges in Industrial Enterprises" CECS09:89.
10.1.6 A reliable AC 220V, 50Hz power supply should be used in the equipment room and the handover room. The equipment room should have a reliable AC power supply. Do not use the adjacent lighting switch to control these power sockets to reduce accidental power outages.
10.2 Electrical protection and grounding
10.2.1 Protective measures should be taken for the integrated wiring network in the following situations: 1. When the following interference sources exist inside the building and a safe interval cannot be maintained: High-frequency interference generated by the distribution box and distribution network Some interference waves generated by the electric spark of high-power motors Fluorescent lamps, electronic starters
Switching power supply
Ringing current of the telephone network
Periodic pulses generated by information processing equipment 2. When the following interference sources exist outside the building, And in an environment with high electromagnetic field strength: radar
radio transmitting equipment
mobile phone base station
high voltage wire
electrified railway
lightning strike area
3When the interference signal field strength of the surrounding environment or the noise battery of the integrated wiring system exceeds the following provisions: For computer local area network, the interference signal below 10kHz to 600MHz is introduced, and its field strength is 1V/M; the interference signal from 600kHz to 2.8GHz is 5V/M.
For telecommunications terminal equipment, through signal, DC or AC lead-in lines, the RF0.15MHz to 80MHz interference signal is introduced, and its field strength is 3V, (amplitude modulation 80%, 1KHz) For terminal equipment with analog/digital terminal interface, when providing telephone services, the noise signal level shall comply with the provisions of Table 10.2.1-1. Table 10.2.1-1 Noise signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
-20 Note
-20 Note
Note: The bandwidth where the noise level exceeds -40dBm should be less than 200MHz When the terminal equipment provides acoustic interface service, the noise signal level should comply with the provisions of Table 10.2.1-2: Table 10.2.1-2 Noise signal limit Acoustic signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
Reference level
Reference level+20dB Note
Reference level
Reference level+20dB Note
Note: 1. The total bandwidth of the noise level exceeding the reference level should be less than 200MHz 2. The nature of the reference level: 1KHz-40dBmo sinusoidal signal. Additional requirements for primary access equipment of ISDN: the number of frame line losses should be less than 10 within a 10-second test period. The background noise should be at least -12dB less than the reference level. When the electric field strength of the interference wave emitted by the integrated wiring system exceeds the provisions of Table 10.2.1-3: Table 10.2.1-3 Limits of the electric field strength of the emitted interference wave Frequency range
Measurement distance
30MHz~230MHz
>230MHz~1GHz
Note: 1. Class A equipment: tertiary industry; Class B equipment: residential. 2. The lower limit applies to the case of reduced frequency 1 Class B equipment 10m
Class A equipment 30m
30dBμV/m
37dBμV/m
30dBμV/m
37dBμV/m
Whether the integrated wiring system needs to take protective measures is relatively complex, among which the most harmful is the prevention of electromagnetic interference and electromagnetic radiation. Electromagnetic interference will affect the normal operation of the integrated wiring system; electromagnetic radiation will affect the security of the integrated wiring system in normal operation, so that information will not be stolen by irrelevant personnel, or cause electromagnetic pollution. When designing the integrated wiring system project, it is necessary to make careful arrangements and considerations according to the requirements of the construction unit and select appropriate protective measures. Different protective measures should be taken according to different use occasions of the integrated wiring. The specifications list various types of interference sources, which should be paid attention to during design. The key points of protection are explained as follows: 1 Anti-electromagnetic interference5um fiber cladding diameter 125 slow-change enhanced multimode optical cable, nominal wavelength 850nm or 1300nm; single-mode optical cable with nominal wavelength 1310nm or 1550nm can also be used. Integrated wiring in buildings is generally used for distance transmission. 9.0.5 The digital serial bit rate and digital interface characteristics of the optical cable digital transmission system shall comply with the following provisions: 1PDH digital serial bit rate level shall comply with the provisions of the national standard GB4110-83 "Pulse Code Modulation Communication System Series", as shown in Table 9.0.5:
Table 9.0.5 Series bit rate
Digital serial level
Nominal bit rate (kbps) 2048
Secondary group
Third group
Fourth group
139264
2 The bit rate deviation, pulse waveform characteristics, code type, input and output port specifications of the digital interface shall comply with the provisions of the national standard GB7611D-87 "Pulse Code Modulation Communication System Network Digital Interface Parameters". 9.0.6 The optical cable transmission system should use loose tube or skeleton fiber bundled optical cable, and ribbon optical fiber cable can be used. 9.0.7 The hardware handover equipment of the standard optical cable connector in the optical cable transmission system should not only support the connector, but also directly support the bundled optical cable and the jumper optical cable.
9.0.8 The connection of various optical cables should use a universal optical cable box to provide reliable connection and protective housing for the joints of bundled optical cables, ribbon optical cables or jumper optical cables. The optical cable entrance provided by the universal optical cable box should be able to accommodate multiple building optical cables at the same time. Optical cables, like copper cables, also have armored, ordinary and filled types. When ribbon optical cables are interconnected with ribbon optical cables, display splicing connectors must be used. If the optical cable in a ribbon optical cable is to be interconnected with an indoor non-ribbon optical cable, an enhanced conversion splicing connector should be used. 9.0.9 The optical cable wiring network can be installed in a building or building complex environment, and can support various bandwidth communication services that were not clearly defined in the initial design stage. Such a wiring system can be used as an independent local area network (LAN) or a local image transmission network such as conference television and surveillance television, and can also be connected to the public telephone network. 10. Power supply, protection and grounding
10.1 Power supply
10.1.1 When placing a computer host in an equipment room, the engineering design should be carried out in accordance with the power supply requirements of the computer host. 10.1.4 When placing a program-controlled user exchange in an equipment room, the engineering design should be carried out in accordance with the "Engineering Design Specifications for Program-controlled User Exchanges in Industrial Enterprises" CECS09:89.
10.1.6 A reliable AC 220V, 50Hz power supply should be used in the equipment room and the handover room. The equipment room should have a reliable AC power supply. Do not use the adjacent lighting switch to control these power sockets to reduce accidental power outages.
10.2 Electrical protection and grounding
10.2.1 Protective measures should be taken for the integrated wiring network in the following situations: 1. When the following interference sources exist inside the building and a safe interval cannot be maintained: High-frequency interference generated by the distribution box and distribution network Some interference waves generated by the electric spark of high-power motors Fluorescent lamps, electronic starters
Switching power supply
Ringing current of the telephone network
Periodic pulses generated by information processing equipment 2. When the following interference sources exist outside the building, And in an environment with high electromagnetic field strength: radar
radio transmitting equipment
mobile phone base station
high voltage wire
electrified railway
lightning strike area
3When the interference signal field strength of the surrounding environment or the noise battery of the integrated wiring system exceeds the following provisions: For computer local area network, the interference signal below 10kHz to 600MHz is introduced, and its field strength is 1V/M; the interference signal from 600kHz to 2.8GHz is 5V/M.
For telecommunications terminal equipment, through signal, DC or AC lead-in lines, the RF0.15MHz to 80MHz interference signal is introduced, and its field strength is 3V, (amplitude modulation 80%, 1KHz) For terminal equipment with analog/digital terminal interface, when providing telephone services, the noise signal level shall comply with the provisions of Table 10.2.1-1. Table 10.2.1-1 Noise signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
-20 Note
-20 Note
Note: The bandwidth where the noise level exceeds -40dBm should be less than 200MHz When the terminal equipment provides acoustic interface service, the noise signal level should comply with the provisions of Table 10.2.1-2: Table 10.2.1-2 Noise signal limit Acoustic signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
Reference level
Reference level+20dB Note
Reference level
Reference level+20dB Note
Note: 1. The total bandwidth of the noise level exceeding the reference level should be less than 200MHz 2. The nature of the reference level: 1KHz-40dBmo sinusoidal signal. Additional requirements for primary access equipment of ISDN: the number of frame line losses should be less than 10 within a 10-second test period. The background noise should be at least -12dB less than the reference level. When the electric field strength of the interference wave emitted by the integrated wiring system exceeds the provisions of Table 10.2.1-3: Table 10.2.1-3 Limits of the electric field strength of the emitted interference wave Frequency rangewwW.bzxz.Net
Measurement distance
30MHz~230MHz
>230MHz~1GHz
Note: 1. Class A equipment: tertiary industry; Class B equipment: residential. 2. The lower limit applies to the case of reduced frequency 1 Class B equipment 10m
Class A equipment 30m
30dBμV/m
37dBμV/m
30dBμV/m
37dBμV/m
Whether the integrated wiring system needs to take protective measures is relatively complex, among which the most harmful is the prevention of electromagnetic interference and electromagnetic radiation. Electromagnetic interference will affect the normal operation of the integrated wiring system; electromagnetic radiation will affect the security of the integrated wiring system in normal operation, preventing information from being stolen by irrelevant personnel, or cause electromagnetic pollution. When designing the integrated wiring system project, it is necessary to make careful arrangements and considerations according to the requirements of the construction unit and select appropriate protective measures. Different protective measures should be taken according to different use occasions of the integrated wiring. The specifications list various types of interference sources, which should be paid attention to during design. The key points of protection are explained as follows: 1 Anti-electromagnetic interference1 Power supply
10.1.1 When placing a computer host in an equipment room, the engineering design should be carried out in accordance with the power supply requirements of the computer host. 10.1.4 When placing a program-controlled user exchange in an equipment room, the engineering design should be carried out in accordance with the "Engineering Design Specifications for Program-controlled User Exchanges in Industrial Enterprises" CECS09:89.
10.1.6 A reliable AC 220V, 50Hz power supply should be used in the equipment room and the handover room. The equipment room should have a reliable AC power supply. Do not use the adjacent lighting switch to control these power sockets to reduce accidental power outages.
10.2 Electrical protection and grounding
10.2.1 Protective measures should be taken for the integrated wiring network in the following situations: 1. When the following interference sources exist inside the building and a safe interval cannot be maintained: High-frequency interference generated by the distribution box and distribution network Some interference waves generated by the electric spark of high-power motors Fluorescent lamps, electronic starters
Switching power supply
Ringing current of the telephone network
Periodic pulses generated by information processing equipment 2. When the following interference sources exist outside the building, And in an environment with high electromagnetic field strength: radar
radio transmitting equipment
mobile phone base station
high voltage wire
electrified railway
lightning strike area
3When the interference signal field strength of the surrounding environment or the noise battery of the integrated wiring system exceeds the following provisions: For computer local area network, the interference signal below 10kHz to 600MHz is introduced, and its field strength is 1V/M; the interference signal from 600kHz to 2.8GHz is 5V/M.
For telecommunications terminal equipment, through signal, DC or AC lead-in lines, the RF0.15MHz to 80MHz interference signal is introduced, and its field strength is 3V, (amplitude modulation 80%, 1KHz) For terminal equipment with analog/digital terminal interface, when providing telephone services, the noise signal level shall comply with the provisions of Table 10.2.1-1. Table 10.2.1-1 Noise signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
-20 Note
-20 Note
Note: The bandwidth where the noise level exceeds -40dBm should be less than 200MHz When the terminal equipment provides acoustic interface service, the noise signal level should comply with the provisions of Table 10.2.1-2: Table 10.2.1-2 Noise signal limit Acoustic signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
Reference level
Reference level+20dB Note
Reference level
Reference level+20dB Note
Note: 1. The total bandwidth of the noise level exceeding the reference level should be less than 200MHz 2. The nature of the reference level: 1KHz-40dBmo sinusoidal signal. Additional requirements for primary access equipment of ISDN: the number of frame line losses should be less than 10 within a 10-second test period. The background noise should be at least -12dB less than the reference level. When the electric field strength of the interference wave emitted by the integrated wiring system exceeds the provisions of Table 10.2.1-3: Table 10.2.1-3 Limits of the electric field strength of the emitted interference wave Frequency range
Measurement distance
30MHz~230MHz
>230MHz~1GHz
Note: 1. Class A equipment: tertiary industry; Class B equipment: residential. 2. The lower limit applies to the case of reduced frequency 1 Class B equipment 10m
Class A equipment 30m
30dBμV/m
37dBμV/m
30dBμV/m
37dBμV/m
Whether the integrated wiring system needs to take protective measures is relatively complex, among which the most harmful is the prevention of electromagnetic interference and electromagnetic radiation. Electromagnetic interference will affect the normal operation of the integrated wiring system; electromagnetic radiation will affect the security of the integrated wiring system in normal operation, so that information will not be stolen by irrelevant personnel, or cause electromagnetic pollution. When designing the integrated wiring system project, it is necessary to make careful arrangements and considerations according to the requirements of the construction unit and select appropriate protective measures. Different protective measures should be taken according to different use occasions of the integrated wiring. The specifications list various types of interference sources, which should be paid attention to during design. The key points of protection are explained as follows: 1 Anti-electromagnetic interference1 Power supply
10.1.1 When placing a computer host in an equipment room, the engineering design should be carried out in accordance with the power supply requirements of the computer host. 10.1.4 When placing a program-controlled user exchange in an equipment room, the engineering design should be carried out in accordance with the "Engineering Design Specifications for Program-controlled User Exchanges in Industrial Enterprises" CECS09:89.
10.1.6 A reliable AC 220V, 50Hz power supply should be used in the equipment room and the handover room. The equipment room should have a reliable AC power supply. Do not use the adjacent lighting switch to control these power sockets to reduce accidental power outages.
10.2 Electrical protection and grounding
10.2.1 Protective measures should be taken for the integrated wiring network in the following situations: 1. When the following interference sources exist inside the building and a safe interval cannot be maintained: High-frequency interference generated by the distribution box and distribution network Some interference waves generated by the electric spark of high-power motors Fluorescent lamps, electronic starters
Switching power supply
Ringing current of the telephone network
Periodic pulses generated by information processing equipment 2. When the following interference sources exist outside the building, And in an environment with high electromagnetic field strength: radar
radio transmitting equipment
mobile phone base station
high voltage wire
electrified railway
lightning strike area
3When the interference signal field strength of the surrounding environment or the noise battery of the integrated wiring system exceeds the following provisions: For computer local area network, the interference signal below 10kHz to 600MHz is introduced, and its field strength is 1V/M; the interference signal from 600kHz to 2.8GHz is 5V/M.
For telecommunications terminal equipment, through signal, DC or AC lead-in lines, the RF0.15MHz to 80MHz interference signal is introduced, and its field strength is 3V, (amplitude modulation 80%, 1KHz) For terminal equipment with analog/digital terminal interface, when providing telephone services, the noise signal level shall comply with the provisions of Table 10.2.1-1. Table 10.2.1-1 Noise signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
-20 Note
-20 Note
Note: The bandwidth where the noise level exceeds -40dBm should be less than 200MHz When the terminal equipment provides acoustic interface service, the noise signal level should comply with the provisions of Table 10.2.1-2: Table 10.2.1-2 Noise signal limit Acoustic signal level limit table Frequency range (MHz)
30~890
890~915
915~1000
Noise signal limit
Reference level
Reference level+20dB Note
Reference level
Reference level+20dB Note
Note: 1. The total bandwidth of the noise level exceeding the reference level should be less than 200MHz 2. The nature of the reference level: 1KHz-40dBmo sinusoidal signal. Additional requirements for primary access equipment of ISDN: the number of frame line losses should be less than 10 within a 10-second test period. The background noise should be at least -12dB less than the reference level. When the electric field strength of the interference wave emitted by the integrated wiring system exceeds the provisions of Table 10.2.1-3: Table 10.2.1-3 Limits of the electric field strength of the emitted interference wave Frequency range
Measurement distance
30MHz~230MHz
>230MHz~1GHz
Note: 1. Class A equipment: tertiary industry; Class B equipment: residential. 2. The lower limit applies to the case of reduced frequency 1 Class B equip
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.