Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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YD 5020-1996 Standards of Engineering Design for Digital Synchronization Network 315.0 via email in 1~5 business day abolished
GB/T 15409-1994 Frame structure for synchronous digital hierarchy signal 90.0 via email in 1~3 business day superseded
YD/T 905-1997 Multipoint control untts for audiovisual systems using digital channels up to 1920kbit/s 165.0 via email in 1~3 business day valid
YDJ 13-1988 Temporary Technical Regulations for Engineering Design of Optical Fiber Digital Transmission System of Urban Local Telephone Network 360.0 via email in 1~3 business day valid
GB 12048-1989 Requirements for clock and synchronization equipment used in the digital network 105.0 via email in 1~3 business day valid
YD 5021-1996 Provisional Standards of SDH Engineering Design for Long-Distance Optical Fibre Cable Transmission Project 645.0 via email in 1~8 business day superseded
YD 5064-1998 Interim Provisions ofr Design of Public FR Broedband Network Engineering 600.0 via email in 1~5 business day valid
YD/T 1011-1999 Technology requirement and test method of stand alone synchronization equipment in digital synchronization network 420.0 via email in 1~3 business day valid
YDN 045-1997 Basic Specifications for Management Network Information Model of Synchronous Digital Hierarchy (SDH) 1740.0 via email in 1~3 business day valid
YD/T 977-1998 Network capabilities to support broadband multimedia retrieval services 690.0 via email in 1~3 business day abolished
YD 5075-1998 Digital Cross-connect Equipment Engineering Designing Standard for Local Telephone Network 850.0 via email in 1~5 business day abolished
YD/T 1190-2002 Network-based IP VPN 330.0 via email in 1~3 business day valid
YD/T 871-1996 Universal Network Information Model of Telecommunication Management Network (TMN) 900.0 via email in 1~3 business day valid
YD 5023-1996 The Engineering Design Standard for the User Access Network 540.0 via email in 1~5 business day abolished
YD/T 959-1998 Management Functions of Telecommunication Management Network (TMN) 510.0 via email in 1~3 business day valid
YD/T 985-1998 Regulations for Establishment of Communications Between Audiovisual Terminals With 3 Or More Digital Channels At Below 1930kbit/S 570.0 via email in 1~3 business day valid
YD/T 930-1997 Principles for the maintenance of ISDNs 240.0 via email in 1~3 business day valid
YD/T 933-1997 TMN management services and telecommunications managed areas 240.0 via email in 1~3 business day valid
YD/T 934-1997 TMN physical architecture 240.0 via email in 1~3 business day valid
GB/T 4110-1983 Pulse code modulation communication system hierarchy 60.0 via email in 1~3 business day valid
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