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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Industrial Enterprise Communication Design Specification
GBJ42—81
1982 Beijing
Engineering Construction Standard Full-text Information System
W Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Industrial Enterprise Communication Design Specification
GBJ42—81
Editorial Department, Ministry of Posts and Telecommunications of the People's Republic of China Approval Department: National Capital Construction Commission of the People's Republic of China Ministry of Posts and Telecommunications of the People's Republic of China
Trial Date Issue: 1
Engineering Construction Standards Full Text Information System
January
Engineering Construction Standards Full Text Information System
Notice on Issuing the "Industrial Enterprise Communication Design Specification"
(81) Jianfashezi No. 194
According to the requirements of the National Capital Construction Committee's (73) Jiangeshezi No. 239 Notice, the "Industrial Enterprise Communication Design Specification" compiled by the Ministry of Posts and Telecommunications together with relevant departments and units has been reviewed by relevant departments. The "Industrial Enterprise Communication Design Specification" GBJ42-81 is now approved as a national standard and will be implemented on a trial basis from January 1, 1982.
This specification is managed by the Ministry of Posts and Telecommunications, and its specific interpretation and other work are the responsibility of the Beijing Design Institute of the Ministry of Posts and Telecommunications.
National Capital Construction Committee
May 6, 1981
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Engineering Construction Standards Full Text Information System
Preparation Instructions
This specification is prepared by our department in conjunction with the Ministry of Metallurgy, the Seventh Ministry of Machinery Industry and other relevant units in accordance with the Notice No. 239 of the National Capital Construction Committee (73) Jian Ge She Zi.
In the process of preparing the specification, we conducted a relatively extensive investigation and research, carried out necessary scientific experiments in combination with the characteristics of industrial enterprise communications, summarized my country's practical experience over the past 20 years, and solicited opinions from relevant units across the country on many occasions. After several discussions and revisions, it was finally reviewed and finalized in conjunction with relevant departments. This specification is divided into nine chapters, 336 articles and ten appendices. The main contents include general provisions, factory (mine) area telephone, long-distance communication, dispatch telephone and conference telephone, wired broadcasting, production amplification, DC master and slave clocks, power supply and building design. During the trial implementation of this specification, all units are requested to accumulate information and summarize experience. If any amendments or additions are found, please send your opinions and relevant information to the Beijing Design Institute of the Ministry of Posts and Telecommunications for reference in future revisions. Ministry of Posts and Telecommunications
May 1981
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1
Chapter 2
(Mining) Area Telephone
Phone Station Planning·
Section 1
Section 2
Section 3
Section 4
General Provisions
Site Selection
Transmission Design
Relay Method and Numbering System
Audio Line Network
Section 5
Section 6
Line Network Composition
Line Laying
Pitch Specifications Fixed
Pipeline cable line
(sub)
Tunnel cable line
Direct buried cable line
(v) Overhead line
(VI) Wall cable line
(VI) Concealed wiring and exposed pipe wiring in buildings·(VI) Mine cable line
Section 7
Section 8
Section 9
Section 10
Cable entry room and cable trough
Cable pipeline·
Inductive line·
Negative impedance amplifier line
Engineering construction standard full text information system
Engineering construction standard full text information system|| tt||Section 11
Cable inflation
Section 12
Section 13
Cable corrosion protection
Wiring equipment and user telephone equipment
I Factory (mine) telephone station
Section 14 Machine key calculation and equipment configuration
(I) Investigation and determination of telephone traffic
(I) Machine key calculation of step-by-step telephone exchange o00
() Selection of vertical and horizontal user telephone exchange equipment (IV) Determination of the number of manual telephone exchange equipment (v) Determination of the number of other equipment.
Section 15
Machine room and equipment layout
Long-distance communication
Chapter 3
Open-wire carrier line
Section 1
Section 2
Section 3
Section 4
Section 5
Routing selection
Open-wire transmission
Pole surface crossing
Line construction
Introduction equipment
Open-wire carrier communication
Section 6
Section 7
Section 8
Section 9
Section 10bzxz.net
Path organization
External line introduction system
Audio system
Feeding method
Equipment configuration
Section 12
Section 12
Computer room and equipment layout
Indoor wiring
I Long-distance telephone exchange
Section 13
Communication system and connection method
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Engineering Construction Standard Full Text Information System
Section 14
Section 15
Section 16
Relay method of long-distance switching equipment
Equipment configuration
Computer room and equipment layout
Chapter 4
Dispatch phone and conference phone
Section 1|| tt||Dispatching Telephone
Section 2 Conference Telephone
Chapter 5 Cable Broadcasting
Section 1
Cable Broadcasting Network
Section 2
Section 3
Chapter 6
Cable Broadcasting Station
User Equipment
Production Sound Amplification
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 7
Chapter 8
Scope of Application
Principles for Equipment Selection
Transmission Lines
Machine Room and Equipment Layout
DC Master and Slave Clock||t t||Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
AC Power Supply Mode
DC Power Supply Mode and Ripple Voltage
Calculation of Battery Quantity and Capacity
Selection of Power Supply Equipment
Arrangement of Equipment Room and Equipment
Voltage Drop Distribution of DC Feeder Line
Chapter 9 Building
Section 1
Section 2
Section 3
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Fire Resistance Grade and Earthquake Resistance Grade
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General plan design and layout
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Architectural and structural design requirements for various production rooms Engineering construction standard full text information system
Engineering construction standard full text information system
Section 4 Heating, ventilation, fire protection*
Section 5 Electrical lighting
Appendix 1
Design regulations for optimal distribution of line attenuation in audio line network 97 Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
Minimum clearance between overhead cables or open wires and other buildings, etc.
Internal dimensions of various manholes,
Traffic load table of trunk lines·
Crosstalk attenuation standard between loops on each amplification segment 118 Basic pole surface type of open-line carrier line·120
Appendix VII
Cross index table of standard eight-wire pole, standard four-wire pole and bent-leg pole surface of open-line carrier line·
Appendix VIII
Appendix IX
Appendix X
Architectural requirements for production rooms of telecommunication stations and broadcasting stations.138 Glossary ·
Description of Standardized Terms
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Chapter I General Provisions
Article 1 The design of industrial enterprise communications must reflect the spirit of more, faster, better and cheaper, implement the policy of hard work and building the country with diligence and thrift, implement the principles of tapping potential, innovation and transformation, economize on the use of copper, lead and wood, save land, occupy less farmland, carefully design, achieve advanced technology, economic rationality, safety and applicability, and ensure quality, so that industrial enterprise communications meet the requirements of rapidity, accuracy, safety and convenience, and serve the socialist modernization construction. Article 2 This specification applies to new construction, expansion and reconstruction projects of general industrial enterprises. For expansion and reconstruction projects, it should proceed from reality and make full use of existing facilities.
Article 3 In addition to being implemented in accordance with this Code, the communication design of industrial enterprises shall also comply with the current "Code for Fire Protection of Building Design", "Code for Seismic Design of Industrial and Civil Buildings", "Design Standard for Lighting of Industrial Enterprises", "Design Standard for Lighting of Industrial Enterprises", "Design Standard for Heating, Ventilation and Air Conditioning of Industrial Enterprises" and other relevant standards and specifications.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 2 Factory (Mine) Area Telephone
I. Telephone Station Planning
Section 1. General
Establishment Provisions
Article 4 The planning and design of factory (mine) area telephone stations shall meet the following requirements:
1. Be compatible with the development plan of the enterprise; 2. Meet the requirements of production technology and enterprise management for factory (mine) area telephones and dispatch telephones;
3. Be compatible with the development of postal and telecommunications networks and relay methods; 4. Make reasonable use of existing communication facilities.
Article 5 The planning of telephone stations shall include the following contents: 1. Number, location, final capacity and order of station establishment; 2. Telephone exchange mechanism and relay method; 3. Exchange area boundary and transmission design;
4. Machine and line capacity to be constructed in the near future;
5. Building area of telephone station;
6. AC power supply plan.
Article 6 If the number of telephone users in the factory (mine) area is less than 20, and the city telephone bureau can meet the needs and it is technically and economically reasonable, no telephone station may be set up. When it is necessary to set up a telephone station, it is not advisable to set it up together with the city telephone bureau or other enterprises that are not under the same management system.
Article 7 If the factory (mine) area is not large, or the area is large but the factory buildings are arranged in a concentrated and compact manner, and there are no obstacles such as rivers, hills, ditches, etc. that are difficult to cross on the main line route, generally one telephone station is set up. If the factory (mine) area is large and the factory buildings are scattered, or there are obstacles that are difficult to cross on the main route, several telephone stations can be set up. Article 8 The demarcation of telephone exchange areas should meet the following requirements: 1. The distribution of telephone stations should be reasonable and meet the transmission requirements; 2. The zoning plan should focus on the short term and take into account the long term; 3. Analyze the distribution of various types of users and the direction of user lines. All users who have close communication and belong to the same dispatching system should be included in one exchange area as much as possible;
4. The shape of the exchange area should be as neat as possible;
5. The route of the trunk cable should be compared according to the terrain and landforms (rivers, hills, ditches, railways, etc.). Cable lines should try to avoid unnecessary relocation, detours or crossing obstacles. Article 9 The recent capacity of the telephone exchange should be determined by the recent number of users plus 20-30% of the reserve capacity. When there is a lack of recent user data, it can be determined by referring to the actual needs of similar enterprises or the telephone penetration rate indicators formulated by relevant departments.
The long-term capacity of telephone exchanges shall be determined based on the development plan of the enterprise and the long-term telephone penetration rate indicators. In the absence of the above information, it can be determined at 150~200% of the recent capacity.
Article 10 The capacity of the outbound lines of telephone stations shall generally be determined at 120~160% of the capacity of telephone exchanges and dispatch telephone switchboards. Article 11 The telephone exchange mode shall generally be selected according to the following provisions: Engineering Construction Standard Full Text Information System
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1. If the capacity in the near term is more than 200 lines, it is advisable to use an automatic telephone exchange;
2. If the capacity in the near term is 200 lines, if there is no major development in the long term, it is advisable to use a public telephone exchange; if there is a major development in the long term, it is advisable to use an automatic telephone exchange;
3. If the capacity in the near term is less than 200 lines, it is advisable to use a public telephone exchange; if the production characteristics of factories and mines require a higher degree of communication automation, or if the capacity is small but the scope of the factory is large, the use of a public telephone exchange requires increased line investment, an automatic telephone exchange may also be used: 4. If the capacity in the near term is 100 lines or less, a magnet telephone exchange may also be used.
When there are several telephone stations in an enterprise, the telephone exchange mode should be as unified as possible.
Section 2 Site Selection
Article 12 The site selection should be as close to the center of the line network as possible while meeting the following requirements:
1. Places with frequent large vibrations or strong noises should be avoided as much as possible. 2. Explosive and flammable places and places with excessive dust content in the air, corrosive gases, and corrosive excrement should be avoided as much as possible. If it is impossible to avoid, the telephone station should be located on the upwind side of the maximum frequency wind direction throughout the year of the above-mentioned corrosive gases or factories that produce more dust, smoke, and water vapor. 3. The main step-down substation should be avoided as much as possible. 4. The site should be selected to have a relatively flat terrain, solid geology, a low groundwater level, and a place that will not be flooded. Areas with frequent lightning strikes and places where landslides, landslides, and excavation of pits and tunnels are possible should be avoided. Engineering Construction Standard Full Text Information SystemEngineering Construction Standard Full Text Information System
1. If the capacity is more than 200 lines in the near future, it is advisable to use automatic telephone exchanges;
2. If the capacity is 200 lines in the near future, if there is no major development in the long term, it is advisable to use public telephone exchanges; if there is a major development in the long term, it is advisable to use automatic telephone exchanges.
3. If the capacity is less than 200 lines in the near future, it is advisable to use public telephone exchanges; if the production characteristics of factories and mines require a high degree of communication automation, or if the capacity is small but the scope of factories and mines is large, the use of public telephone exchanges requires increased line investment, and automatic telephone exchanges can also be used: 4. If the capacity is 100 lines or less in the near future, magnetic telephone exchanges can also be used.
When there are several telephone stations in an enterprise, the telephone exchange mechanism should be as unified as possible.
Section 2 Site Selection
Article 12 The site selection should be as close to the line network center as possible under the condition of meeting the following requirements:
1. Avoid places where there are often large vibrations or strong noises as much as possible. 2. Avoid explosive and flammable places as much as possible, as well as places with excessive dust content in the air, corrosive gases, and corrosive excrement. If it is impossible to avoid, the telephone station should be located on the upwind side of the annual maximum frequency wind direction of the factory building with the above-mentioned corrosive gases or dust, smoke, and water vapor. 3. Avoid the main step-down substation as much as possible. 4. Choose a place with flat terrain, solid geology, low groundwater level, and no flooding. Avoid areas with frequent lightning strikes and places where landslides, mudslides, and excavation pits and tunnels are possible. Engineering Construction Standards Full Text Information SystemEngineering Construction Standard Full Text Information System
1. If the capacity is more than 200 lines in the near future, it is advisable to use automatic telephone exchanges;
2. If the capacity is 200 lines in the near future, if there is no major development in the long term, it is advisable to use public telephone exchanges; if there is a major development in the long term, it is advisable to use automatic telephone exchanges.
3. If the capacity is less than 200 lines in the near future, it is advisable to use public telephone exchanges; if the production characteristics of factories and mines require a high degree of communication automation, or if the capacity is small but the scope of factories and mines is large, the use of public telephone exchanges requires increased line investment, and automatic telephone exchanges can also be used: 4. If the capacity is 100 lines or less in the near future, magnetic telephone exchanges can also be used.
When there are several telephone stations in an enterprise, the telephone exchange mechanism should be as unified as possible.
Section 2 Site Selection
Article 12 The site selection should be as close to the line network center as possible under the condition of meeting the following requirements:
1. Avoid places where there are often large vibrations or strong noises as much as possible. 2. Avoid explosive and flammable places as much as possible, as well as places with excessive dust content in the air, corrosive gases, and corrosive excrement. If it is impossible to avoid, the telephone station should be located on the upwind side of the annual maximum frequency wind direction of the factory building with the above-mentioned corrosive gases or dust, smoke, and water vapor. 3. Avoid the main step-down substation as much as possible. 4. Choose a place with flat terrain, solid geology, low groundwater level, and no flooding. Avoid areas with frequent lightning strikes and places where landslides, mudslides, and excavation pits and tunnels are possible. Engineering Construction Standards Full Text Information SystemEngineering Construction Standard Full Text Information System
1. If the capacity is more than 200 lines in the near future, it is advisable to use automatic telephone exchanges;
2. If the capacity is 200 lines in the near future, if there is no major development in the long term, it is advisable to use public telephone exchanges; if there is a major development in the long term, it is advisable to use automatic telephone exchanges.
3. If the capacity is less than 200 lines in the near future, it is advisable to use public telephone exchanges; if the production characteristics of factories and mines require a high degree of communication automation, or if the capacity is small but the scope of factories and mines is large, the use of public telephone exchanges requires increased line investment, and automatic telephone exchanges can also be used: 4. If the capacity is 100 lines or less in the near future, magnetic telephone exchanges can also be used.
When there are several telephone stations in an enterprise, the telephone exchange mechanism should be as unified as possible.
Section 2 Site Selection
Article 12 The site selection should be as close to the line network center as possible under the condition of meeting the following requirements:
1. Avoid places where there are often large vibrations or strong noises as much as possible. 2. Avoid explosive and flammable places as much as possible, as well as places with excessive dust content in the air, corrosive gases, and corrosive excrement. If it is impossible to avoid, the telephone station should be located on the upwind side of the annual maximum frequency wind direction of the factory building with the above-mentioned corrosive gases or dust, smoke, and water vapor. 3. Avoid the main step-down substation as much as possible. 4. Choose a place with flat terrain, solid geology, low groundwater level, and no flooding. Avoid areas with frequent lightning strikes and places where landslides, mudslides, and excavation pits and tunnels are possible. Engineering Construction Standards Full Text Information SystemEngineering Construction Standard Full Text Information System
1. If the capacity is more than 200 lines in the near future, it is advisable to use automatic telephone exchanges;
2. If the capacity is 200 lines in the near future, if there is no major development in the long term, it is advisable to use public telephone exchanges; if there is a major development in the long term, it is advisable to use automatic telephone exchanges.
3. If the capacity is less than 200 lines in the near future, it is advisable to use public telephone exchanges; if the production characteristics of factories and mines require a high degree of communication automation, or if the capacity is small but the scope of factories and mines is large, the use of public telephone exchanges requires increased line investment, and automatic telephone exchanges can also be used: 4. If the capacity is 100 lines or less in the near future, magnetic telephone exchanges can also be used.
When there are several telephone stations in an enterprise, the telephone exchange mechanism should be as unified as possible.
Section 2 Site Selection
Article 12 The site selection should be as close to the line network center as possible under the condition of meeting the following requirements:
1. Avoid places where there are often large vibrations or strong noises as much as possible. 2. Avoid explosive and flammable places as much as possible, as well as places with excessive dust content in the air, corrosive gases, and corrosive excrement. If it is impossible to avoid, the telephone station should be located on the upwind side of the annual maximum frequency wind direction of the factory building with the above-mentioned corrosive gases or dust, smoke, and water vapor. 3. Avoid the main step-down substation as much as possible. 4. Choose a place with flat terrain, solid geology, low groundwater level, and no flooding. Avoid areas with frequent lightning strikes and places where landslides, mudslides, and excavation pits and tunnels are possible. Engineering Construction Standards Full Text Information System
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