Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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GB/T 20851.1-2007/XG1-2012 Electronic toll collection―Dedicated short range communication―Part 1:Physical payer, including Amendment 1 165.0 via email in 1~3 business day valid
GB/T 20851.5-2007 Electronic toll collection—Dedicated short range communication—Part 5:Test methods of the main parameters in physical layer 90.0 via email in 1~3 business day superseded
GB/T 15127-2008 Information technology - Telecommunications and information exchange between systems - Twisted pair multipoint interconnections 335.0 via email in 1~5 business day to be valid
GB/T 17535-1998 Information technology--Telecommunications and information exchange between systems--Interface connector and contact assignments for ISDN basic access interface located at reference points S and T 150.0 via email in 1~3 business day valid
GB/T 15123-2008 Information technology - Telecommunication and information exchange between systems - DTE/DCE interface back-up control operation using GB/T 3454 interchange circuits 170.0 via email in 1~3 business day valid
GB/T 17959-2000 Information technology - Telecommunications and information exchange between systems - 50 - Pole interface connector mateability dimensions and contact number assignments 140.0 via email in 1~3 business day valid
GB/T 18235.1-2000 Information technology - High - Performance Parallel Interface - Part 1: Mechanical, electrical and signaling protocol specification (HIPPI - PH) 630.0 via email in 1~3 business day valid
GB/T 17559-1998 Information technology--Telecommunications and information exchange between systems--26-pole interface connector mateability dimensions and contact number assignments 140.0 via email in 1~3 business day valid
GB/T 13133-1991 Data communication?DTE to DTE physical connection using X.24 interchange circuits with DTE provided timing 75.0 via email in 1~3 business day abolished
GB/T 14397-2008 Information technology - Telecommunication and information exchange between systems - Start-stop transmission signal quality at DTE/DCE interfaces 200.0 via email in 1~3 business day to be valid
GB/T 1989 7.3-2005 GB/T 1989 7.3-2005 Automatic Meter Reading System Lower Layer Communication Protocol Part 3: Physical layer services and procedures for connection oriented asynchronous data exchange 300.0 via email in 1~3 business day valid
GB/T 17183-1997 High speed 25-position interface for data terminal equipment and data circuit-terminating equipment,including alternative 26-position connector 375.0 via email in 1~3 business day valid
GB/T 17534-1998 Information technology - Open Systems Interconnection - Physical service definition 345.0 via email in 1~3 business day valid
GB/T 20851.1-2007 Electronic toll collection—Dedicated short range communication—Part 1:Physical payer 120.0 via email in 1~3 business day superseded
GB/T 13133-2008 Information technology - Telecommunication and information exchange between systems - DTE to DTE direct connections 200.0 via email in 1~3 business day valid
GB/T 20851.5-2007/XG1-2012 Electronic toll collection—Dedicated short range communication—Part 5:Test methods of the main parameters in physical layer 90.0 via email in 1~3 business day valid
YD/T 1947-2009 Technical Requirement of Physical Layer for Extended Reach Ethernet based on 2D-PAM3 and 4D-PAM5 810.0 via email in 1~3 business day valid
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