Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
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YDB 007-2007 Technical Requirements for PSTN/ISDN Simulation Services in NGN 195.0 via email in 1~3 business day valid
YDB 006-2007 Technical Requirements for PSTN/ISDN Emulation Services in NGN 120.0 via email in 1~3 business day valid
YD/T 1377.1-2005 Testing methods of service and protocol of peer to peer short message interworking between networksPart1 : Testing methods of peer to peer short message interworking between PSTN and 675.0 via email in 1~3 business day valid
YD/T 1430-2006 Specification of interworking requirements for one number services 120.0 via email in 1~3 business day valid
YD/T 1377.2-2005 Testing methods of service and protocol of peer to peer short message interworking between networks.Part2 : Tesing methods of peer to peer short message interworking between PSTN and 525.0 via email in 1~3 business day valid
YD/T 2024-2009 Technical Requirements of Increasing Trunk Capacity for Internet Connections 150.0 via email in 1~3 business day valid
YD/T 2010-2009 Technical Requirements of Services based on the Unified IMS Multimedia Conferencing Service (Release 1) 1050.0 via email in 1~3 business day valid
YDB 005-2007 Technical Requirements for IP multimedia services in NGN 195.0 via email in 1~3 business day valid
YD/T 1589-2006 The Test Methods for Interworking Gateway in Point to Point Short Message Interworking 450.0 via email in 1~3 business day valid
YD/T 1883.1-2009 Technical Requirements and Testing Methods for Voice Service of the Fixed Softswitch Network Part 1:TG and SG Access Mode 540.0 via email in business day abolished
YD/T 2009-2009 Technical Requirement of Services based on the Unified IMS Customized Multimedia Ringing Service (Release 1) 560.0 via email in business day valid
GB 33473-2016 General technical requirements of handover interfacefor instant communication services 220.0 via email in 1~3 business day valid
YD/T 1379-2005 The requirements for the calling line identification restriction between networks. 135.0 via email in 1~3 business day valid
YD/T 3315-2018 Telecommunication network and internet security service implementation requirements via email in business day valid
YD/T 2011-2009 Technical Requirements of Services based on the Unified IMS Call Waiting (CW) and Call HOLD (HOLD) Services (Release 1) 240.0 via email in 1~3 business day valid
YD/T 1328-2004 The technical requirement and test method for the charging performance of currently used central office switching equipment--mobile network part 345.0 via email in 1~5 business day abolished
YD/T 1248.3-2004 Short message service based on PSTN Technique requirements of short message centre 450.0 via email in 1~5 business day valid
YD/T 1926.1-2009 IT Operations and Maintenance Service Management Technical Specification Part 1:Architecture 210.0 via email in 1~3 business day valid
YD/T 1388.5-2005 Technical requirements of the softswitch based services part 5 : Click to dial services 360.0 via email in 1~3 business day valid
YD/T 1921.1-2009 Technical Requirements for IPService Detail Record Part 1:General Requirements 360.0 via email in 1~3 business day valid
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