Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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YD/T 1970.6-2009 Maintenance Requirements of Power Supply for Telecommunication Stations/Sites Part 6:Generator sets System 105.0 via email in 1~3 business day valid
YD/T 1970.10-2009 Maintenance Requirements of Power Supply for Telecommunication Stations/Sites Part 10:Valve Regulated Lead Acid Battery 105.0 via email in 1~3 business day valid
YD/T 5040-2005 Design Specifications of Engineering for Telecommunication Power Supply Equipment Installation (excluding the Annexes) 160.0 via email in 1 business day valid
YD/T 1058-2007 High Frequency Switch-Mode Power Supply for Communications 300.0 via email in 1~5 business day superseded
YD/T 944-2007 Technical Specification and Testing Methods for Surge Protection of Power Supply for Communications 60.0 via email in 1~2 business day valid
YD/T 512-1992 Technical Conditions for Telegraph Power Supply Unit 150.0 via email in 1~3 business day abolished
YD/T 777-2006 Inversion equipment for telecommunications 285.0 via email in 1~3 business day valid
YD/T 1970.4-2009 Maintenance Requirements of Power Supply for Telecommunication Stations/Sites Part 4:Uninterruptible Power Systems 165.0 via email in 1~3 business day valid
YD/T 1271-2003 Ring generator for telecommunication equipment 225.0 via email in 1~3 business day valid
YD/T 1360-2005 Valve-regulated colloid battery for telecommunication 255.0 via email in 1~3 business day valid
YD/T 1817-2008 DC Remote Feeding Power System for Telecommunication Equipment 240.0 via email in 1~3 business day valid
GB/T 26264-2010 The photovoltaic power system for telecommunication 360.0 via email in 1~3 business day valid
YD/T 1095-2000 Uninterruptible Power Systems for Communications 240.0 via email in 1~3 business day superseded
YD/T 731-2008 High Frequency Switch-Mode Rectifier for Telecommunications 330.0 via email in 1~3 business day valid
GB/T 21544-2008 The charger for lithium-ion batteries of cellular phones 225.0 via email in 1~3 business day valid
YD/T 1104-2001 Technical Requirements & Testing Methods for Supervision Module of Telecommunication Switch Power Supplies 540.0 via email in 1~3 business day valid
YD/T 1074-2000 A.C Voltage stabilizer fr telecommunications 180.0 via email in 1~3 business day valid
YD/T 731-2002 High Frequency Switch-mode Rectifier for Telecommunication 300.0 via email in 1~5 business day superseded
YDJ 31-1983 Technical Specifications for Installation Engineering Construction and Acceptance of Communication Power Supply Equipment 630.0 via email in 1~3 business day valid
YD/T 1004-1999 Technical specifications and test methods of multi-port telephone accounting system 225.0 via email in 1~3 business day valid
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