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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Multicore and symmetrical pair/quad cables for digital communications—Part 41Riser cables—Blank detail specification
Standard published on 5.10.2025
Selected format:Multicore and symmetrical pair/quad cables for digital communications - Part 42:Riser cables - Capability approval-Sectional specification
Standard published on 23.1.2007
Selected format:Multicore and symmetrical pair/quad cables for digital communications—Part 5Symmetrical pair/quad cables with transmission characteristics up to 1000MHz—Horizontal floor wiring—Sectional specification
Standard published on 5.10.2025
Selected format:Multicore and symmetrical pair/quad cables for digital communications—Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1000MHz—Working area wiring—Sectional specification
Standard published on 5.10.2025
Selected format:Multicore and symmetrical pair/quad cables for digital communications—Part 7: Symmetrical pair/quad cables with transmission characteristics up to 1 200MHz—Sectional specification for digital and analog communication cables
Standard published on 29.12.2017
Selected format:Multicore and symmetrical pair/quad cables for digital communications—Part 8: Symmetrical pair/quad cables with transmission characteristics up to 1200MHzWork area wiring sectional specification
Standard published on 29.12.2017
Selected format:Firm booking message--Part 1:Firm booking message of United Nations standard
Standard published on 11.11.1999
Selected format:Firm booking message--Part 2:Firm booking message subset--Booking message
Standard published on 11.11.1999
Selected format:Booking confirmation message--Part 1:Booking confirmation message of United Nations standard
Standard published on 11.11.1999
Selected format:Booking confirmation message--Part 2:Booking confirmation message subset--Booking confirmation message
Standard published on 11.11.1999
Selected format:Latest update: 2026-09-09 (Number of items: 2 300 143)
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