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GB/T 12357.4: Evolution and historical versions
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| GB/T 12357.4-2026 | English | RFQ |
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Multimode optical fibres for telecommunication - Part 4: Sectional specification for category A4 multimode fibres
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| GB/T 12357.4-2016 | English | 339 |
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Multimode optical fibres for telecommunication -- Part 4: Sectional specification for category A4 multimode fibres
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| GB/T 12357.4-2004 | English | 319 |
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Multimode optical fibres for telecommunication -- Part 4: Sectional specification for category A4 multimode fibres
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Basic data
| Standard ID | GB/T 12357.4-2026 (GB/T12357.4-2026) |
| Description (Translated English) | Multimode optical fibres for telecommunication - Part 4: Sectional specification for category A4 multimode fibres |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | M33 |
| Classification of International Standard | 33.180.10 |
| Date of Issue | 2026-03-31 |
| Date of Implementation | 2026-10-01 |
| Older Standard (superseded by this standard) | GB/T 12357.4-2016 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 12357.4-2016: Multimode optical fibres for telecommunication -- Part 4: Sectional specification for category A4 multimode fibres
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Multimode optical fibers for telecommunication.Part 4. Sectional specification for category A4 multimode fibres
ICS 33.180.10
M33
National Standards of People's Republic of China
Replace GB/T 12357.4-2004
Multimode fiber for communication
Part 4. A4 type multimode fiber characteristics
Part 4. SectionalspecificationforcategoryA4multimodefibres
(IEC 60793-2-40..2009, Opticalfibres-Part 2-40. Productspecifications-
SectionalspecificationforcategoryA4multimodefibres, NEQ)
2016-04-25 released
2016-11-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China
China National Standardization Management Committee released
Directory
Preface III
Introduction Ⅴ
1 Scope 1
2 normative reference document 1
3 Terms and definitions 2
4 Product Category 2
5 request 2
5.1 size parameter 2
5.2 fiber length 3
5.3 Mechanical properties of optical fiber 3
5.4 Optical fiber transmission characteristics and optical properties 3
5.5 Environmental performance of optical fiber 5
Appendix A (normative appendix) Mechanical properties Test methods and requirements 7
Appendix B (normative) Additional requirements for A4a class 2 multimode fibers with operating wavelengths below 650 nm 10
Appendix C (normative) Apparatuses for A4a to A4d optical fibers
Foreword
GB/T 12357 "communication with multi-mode fiber" is divided into the following sections.
- Part 1. Class A1 multimode fiber characteristics;
- Part 2. Class A2 multimode fiber characteristics;
- Part 3. Class A3 multimode fiber characteristics;
Part 4. Characteristics of A4 multimode fiber.
This part is part 4 of GB/T 12357.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 12357.4-2004 "Multimode Fiber Series for Communications Part 4. A4 Multimode Fiber Features", this part
Compared with GB/T 12357.4-2004, the main technical changes are as follows.
--- Added "Introduction";
- modified normative reference documents (see Chapter 2,.2004, Chapter 2);
--- The product classification from A4a to A4d class expanded to A4a to A4h class multimode fiber, and A4a class multi-mode fiber is subdivided into
A4a.1 and A4a.2 (see Chapter 4, Chapter 4 of.2004);
--- A4a to A4h multimode fiber size parameter requirements (see Table 2, Table 3 and Table 4 of Table 5.1);
--- According to A4a to A4h transmission characteristics, transmission wavelength difference, divided into three tables are listed separately (see Table 5 in 5.4,
Table 6 and Table 7);
--- The diameter of the cladding of the A4b-type fiber is adjusted from 750 μm ± 45 μm to 750 μm ± 60 μm (see 5.1,.2004)
4.1)
--- increase the length of the fiber by the supplier and the user to determine, as well as the length of the fiber measurement method (see 5.2);
--- clarifies the mechanical performance requirements for A4e to A4h multimode fibers (see 5.3 and Appendix A);
---.2004 version 4.3.2 "macro bend loss to be studied" was clear, an increase of "fiber macro bending loss test methods and requirements"
(See 5.4,.2004 edition 4.3.2);
---.2004 version of the "environmental performance to be studied" was clear, an increase of "the environmental performance of fiber testing methods and to
"To consider the particularity of plastic optical fiber, clear the environmental humidity and temperature conditions (see 5, 5,.2004 version 4.4);
- Added Appendix B "Additional requirements for A4a class 2 multimode fibers with operating wavelengths below 650 nm" (see Appendix B);
--- Added Appendix C "Scrambler for A4a to A4d Class of Optical Fiber" (see Appendix C).
Partial use of the re-drafting method Reference IEC 60793-2-40..2009 "Fiber Optic Section 2-40. Product Specification A4 Multimode Fiber
Characteristics ", and IEC 60793-2-40..2009 consistency degree is not equivalent.
The main technical differences between this part and IEC 60793-2-40..2009 are as follows.
--- A4b class fiber cladding diameter from 750μm ± 45μm adjusted to 750μm ± 60μm;
- Test methods for environmental performance are referred to by IEC 60793-1-50, IEC 60793-1-51 and IEC 60793-1-52
With GB/T 15972.50, GB/T 15972.51 and GB/T 15972.52;
--- Added Appendix A to clarify the mechanical performance test methods and requirements;
--- for the standard readability and easy to find, IEC 60793-2-40..2009 sub-category in the appendix presented in the form of structure
A comprehensive combing the content of this part of the standard form of division.
Please note that some of the contents of this document may relate to patents and that the issuer of this document does not assume responsibility for the identification of these patents.
This part is made by the Ministry of Industry and Information Technology of the People's Republic of China.
This part is headed by the National Communications Standardization Technical Committee (SAC/TC485).
This part of the drafting unit. Wuhan Posts and Telecommunications Research Institute, Inner Mongolia Golden Triangle Fiber Technology Co., Ltd., Jiangsu Tongding Group, Fortis Group
Co., Ltd., Shenzhen Zhongyu Technology Patent Co., Ltd., Sichuan Huiyuan Optical Communication Co., Ltd., Hebei Quartet Communication Equipment Co., Ltd., Jiangxi
Dasheng Plastic Optical Fiber Co., Ltd.
The main drafters of this part. Chen Wei, Liu Cheng, Fang Sheng, Kang Xiaojian, Zhang Liyong, Wang Yahui, Zhang Yongzhi, Huang Xinge, Chen Ming
GB/T 12357 was first published in.1990; the first revision in.2004 the standard is divided into multiple parts; this time for the second revision.
Introduction
GB/T 12357 multi-mode fiber is divided into A1, A2, A3, A4 four categories, including A4 class multimode fiber refers to what we usually say
Plastic multimode fiber, the main technical content of this part is the A4 class multi-mode fiber requirements and specifications.
Multimode fiber for communication
Part 4. A4 type multimode fiber characteristics
1 Scope
This part of GB/T 12357 specifies the product classification, geometry parameters, optical and transmission characteristics of A4 multimode fiber, mechanical
And environmental performance requirements.
This section applies to A4 class multimode fibers used in short distance communication cables and other information transmission equipment.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 2421.1 Overview of environmental testing of electrical and electronic products and guidance (GB/T 2421.1-2008, IEC 60068-1. 1988,
IDT)
GB/T 7424.2-2008 General specification for optical cables - Part 2. Basic test methods for optical cables (IEC 60794-1-2..2003, MOD)
GB/T 14733.12 Telecommunications terminology Optical fiber communication (GB/T 14733.12-2008, IEC 60050 (731)..1991, IDT)
GB/T 15972.20 Specifications for optical fiber test methods - Part 20. Methods of measurement of dimensional parameters and test procedures - Optical fiber geometry
Parameters (GB/T 15972.20-2008, IEC 60793-1-20..2001, MOD)
GB/T 15972.22 Specifications for optical fiber test methods - Part 22. Measurement methods and test procedures for dimensional parameters - Length
(GB/T 15972.22-2008, IEC 60793-1-22..2001, MOD)
GB/T 15972.40 Specifications for optical fiber test methods - Part 40. Measurement methods and test procedures for transmission characteristics and optical properties
Order - attenuation (GB/T 15972.40-2008, IEC 60793-1-40..2001, MOD)
GB/T 15972.41 Specifications for optical fiber test methods - Part 41. Measurement methods and test procedures for transmission characteristics and optical properties
(GB/T 15972.41-2008, IEC 60793-1-41..2001, MOD)
GB/T 15972.42 Specifications for optical fiber test methods - Part 42. Measurement methods and test procedures for transmission characteristics and optical properties
Sequence - wavelength dispersion (GB/T 15972.42-2008, IEC 60793-1-42..2001, MOD)
GB/T 15972.43 Specifications for optical fiber test methods - Part 43. Measurement methods and test procedures for transmission characteristics and optical properties
Sequence - numerical aperture (GB/T 15972.43-2008, IEC 60793-1-43..2001, MOD)
GB/T 15972.47-2008 Specifications for optical fiber test methods - Part 47. Methods of measurement of transmission characteristics and optical properties and tests
(GB/T 15972.47-2008, IEC 60793-1-47..2001, MOD)
GB/T 15972.50 Specifications for optical fiber test methods - Part 50. Methods of measurement of environmental performance and test procedures - Constant humidity
(GB/T 15972.50-2008, IEC 60793-1-50..2001, MOD)
GB/T 15972.51 Specifications for optical fiber test methods - Part 51. Methods of measurement of environmental performance and test procedures - Dry heat
(GB/T 15972.50-2008, IEC 60793-1-51..2001, MOD)
GB/T 15972.52 Specifications for optical fiber test methods - Part 52. Methods of measurement of environmental performance and test procedures - Temperature cycling
(GB/T 15972.52-2008, IEC 60793-1-52..2001, MOD)
IEC 60793-1-41..2010 Fiber Optics Part 1-41. Bandwidth Test Methods and Test Procedures (OpticalfibresPart 1-41.
Measurementmethodsandtestprocedures-Bandwidth)
