Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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YD/T 1660-2007 Technical Specification and Testing Methods for NT1+ Plus Equipment 2190.0 via email in 1~3 business day valid
YD/T 1473-2006 Technical Requirements of V5.2 User Adaptation Layer 210.0 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
GB/T 11444.4-1996 Transmitter, receiver and ground communication equipment used in domestic satellite communication earth stations-Technical requirements-Part 4: Intermediate data rate (IDR) transmiss 240.0 via email in 1~3 business day valid
YD/T 1420-2005 Technical requirements for jitter and wander in digital networks based on 2048kbit/s hierarchy 525.0 via email in 1~5 business day valid
YD/T 941-1997 ISDN user-network interface supplementay service comformance testing specification 2175.0 via email in 1~10 business day valid
YD/T 935-1997 TMN logical layered architecture 150.0 via email in 1~3 business day valid
GB/T 12010.7-2010 Plastics—Poly(vinyl alcohol) (PVAL) materials—Part 7:Determination for sodium hydroxide contents 120.0 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 933-1997 TMN management services and telecommunications managed areas 240.0 via email in 1~3 business day valid
GB/T 15839-1995 ~ 165.0 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
YD/T 1472-2006 Technical Requirements for Adaptation Layer of ISDN Signalling Interworking with IP 540.0 via email in 1~3 business day valid
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