Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
LoginRegister
Position: Search valid to be valid superseded to be superseded abolished to be abolished
Standard No. Title Price(USD) Delivery Status Add to Cart
GB/T 14731-1993 Synchronous digital hierarchy bit rates 45.0 via email in 1~3 business day abolished
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
YD/T 1190-2002 Network-based IP VPN 330.0 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/T 906-1997 A Real time control protocol for simplex applications using LSD/HSD/MLP channels of the frame structure for A64TO 1920kbit/s channel in i 135.0 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 847-1996 Frame Structures of 64 -1920kbit/S Channels in Audiovisual Telecommunication Services 390.0 via email in 1~3 business day valid
GB/T 15940-1995 Basic multiplexing structure for synchronous digital hierarchy signals 165.0 via email in 1~3 business day abolished
YD/T 1012-1999 Node clock set of digital synchronization network and its timing feature 210.0 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 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SDH Engineering Design for Long-Distance Optical Fibre Cable Transmission Project 645.0 via email in 1~8 business day superseded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/T 930-1997 Principles for the maintenance of ISDNs 240.0 via email in 1~3 business day valid
GB/T 13158-1991 Compatibility test procedures of clock and synchroni-zation equipment of digital switch introduced into di-gital network 120.0 via email in 1~3 business day valid
GB/T 16858-1997 A far end camera control protocol for videoconferences using data link protocol 120.0 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
YD 5020-1996 Standards of Engineering Design for Digital Synchronization Network 315.0 via email in 1~5 business day abolished
YD 5023-1996 The Engineering Design Standard for the User Access Network 540.0 via email in 1~5 business day abolished
YD/T 848-1996 Systems for Establishment of Communication Between Audiovisual Terminals By Using 2Mbit/S and Below 2Mbit/S Digital Channels 420.0 via email in 1~3 business day valid
YD/T 959-1998 Management Functions of Telecommunication Management Network (TMN) 510.0 via email in 1~3 business day valid
About Us | Contact Us | Payment
Tel: +86-10-8572 5655 | Fax: +86-10-8581 9515 | Email: coc@codeofchina.com | Send me a messageQQ: 672269886
Copyright: Codeofchina Inc 2008-2020